Failure to follow these codes, regulations and recommendations could result in hazardous installation, bodily injury and/or death.

Transcription

1 Carburetors IMPORTANT INFORMATION: Product must be installed and used in strict conformance with NFPA Pamphlet 8 and/or NFPA Pamphlet 4 and all other codes, regulations and manufacturer recommendations. Failure to follow these codes, regulations and recommendations could result in hazardous installation, bodily injury and/or death. PRODUCT TRAINING SCHOOLS AVAILABLE. Contact a GEC customer service representative for more information. WARNING: LP Gas is extremely flammable and explosive. Devices used for handling LP Gas and Anhydrous Ammonia must be installed and used in strict conformance with NFPA Pamphlet 8 and 4 and all other codes, regulations and manufacturer recommendations. 29

2 Carburetor Sizing Selecting the Correct Carburetor Size Formulas for Cubic-Feet-Per-Minute (CFM) Air Flow Requirements. Determining specific airflow requirement for any engine requires only the application of the following formulas: Naturally Aspirated Engines (Carbureted) CID x RPM /728/2 x.8 = CFM Required The engine air-flow requirement determined by this formula is at 8% of volumetric efficiency for four-cycle engines. For two-cycle engines double the cubic feet/minute valve.. Determine the cubic inch displacement of the engine from the identification plate or the user s manual. (If the displacement is known in cubic centimeters, convert to cubic inches by multiplying cubic centimeters by If in liters, convert to cubic inches by multiplying liters by 6.02.) 2. Multiply the figure by the RPM figure corresponding to the maximum engine speed at wide open throttle. (Use the point at which the tachometer is redlined. If the engine is not equipped with a tachometer, refer to the user s manual supplied with the vehicle or engine.). Divide this CIM (cubic inches per minute) by 728 to obtain cubic feet per minute. 4. Divide the result by 2 (for 4 stroke engines).. Multiply the figure you obtain by.8 For 8% volumetric efficiency). 6. This figure is the precise air-flow requirement for the engine, accurate to one cubic foot/minute. Example: CID x 4000 RPM =,404,000 cubic inches per minute,404,000 /728 = 82. CFM (2 stroke) 82./2 = CFM (4 stroke) x.8 = 4 CFM (at 8% volumetric efficiency. Fuel Injected Engines Due to improved intake manifold design, use 00% of volumetric efficiency for fuel injected engines. CID x RPM /728 /2 = CFM required. Example: CID x 4000 RPM =,404,000 CIM,404,000 /728 = 82. CFM (2 stroke) 82. /2 = CFM (4 stroke) X CFM (at 00% volumetric efficiency) Turbocharged Engines (with mixer upstream of turbocharger) CID x RPM/728 x 2 x % boost pressure + = CFM Required Normal air inlet pressure to the engine is 4.7 PSI (one atmosphere). Adding a turbocharger merely serves to increase the inlet pressure. For example, 6 PSI boost equates to 4.7 PSI plus 6 PSI, or a combined inlet pressure of 20.7 PSI (or 40% of one atmosphere) at sea level. Here is how this works starting with the above formula: I. One atmosphere equals 4.7 PSI. II. 6 PSI boost equals 40% of one atmosphere. III. Thus you must multiply the normal CFM by.40 to establish the requirement for six pounds of boost pressure. Example: CID x 4000 RPM = 404,000 CIM,404,000 /728 = 82. CFM (2 stroke) 82. / 2 = CFM (4 stroke) x.4 = 68.7 CFM (at 6 PSI boost) In selecting the correct carburetor or mixer from the listing, bear in mind whether the conversion is to be straight propane or dual fuel (propane and gasoline). All models listed are available for straight fuel or dual fuel applications. Impco Carburetor (Mixer) Sizing As It Relates to Air Flow Vehicle Engine Applications Wide Open Throttle 2" Manifold Depression Model Related Horse- Power Cubic Feet/ min. Cubic Feet/ hr HP 9, HP 08 6, HP 70 0, HP 202 2, HP 20 2, HP 276 6, HP 29 9,740 00A-, 00A-20 00A-0, 00A HP 48 20, HP 42 2, HP ,

3 Impco Model J Series -00H.P. LP Gas Two-Stage Converter Ref. S7-4 Screen, atmosphere vent (Model J only) 2 S-9* 4 W-27* AD-26* AD-27* 6 S-42* 7 L-7 8 P x SEMS (6) Cover assy., secondary: C-4, P-0, S2-2, W-27, S7-4 Washer, hand primer Diaphragm assy., secondary, hydrin: D-26, P2-28, P2-27, R2-4 (2) Diaphragm assy., secondary, hydrin: D-27, P2-28, P2-27, R2-4 (2) 8-2 x SEMS Lever, secondary regulator Pin, secondary fulcrum 9 S4-27* Seat, secondary regulator (new) 0 S2- S2-8** Spring, blue secondary, standard Spring, orange secondary, optional AC-4 AB- Body assy,: B-, J-7, P-4, J- 2 S x SEMS (2) S4-6* 4 G-8* P2-26 Seat, primary regulator Gasket, body to plate Plate, convertor body cover 6 P- Plug, pipe, hex head 7 S2-6 8 P-4* 9 AD-22* 20 C- Spring, primary regulator Pin, primary valve Diaphragm assy., primary: D-22, P2-29, R2-, (), L-6 Cover, primary regulator 2 S-0* 8-2 x " SEMS ( 7) 22 V-20* ** Check valve * ** Retainer ring NOTES: * Indicates repair kit components. ** Two vapor outlet pressures are available. Orange secondary spring gives negative 2" water column. Blue secondary spring gives negative 2" water column. To change any JB converter to JO, change blue secondary spring to orange. *** Not shown. Repair Kits RK - J RK - J - 2 Buna Silicone 29

4 Two-Stage Converters Impco Model L Series 2 H.P. - LP Gas Ref. S7-2 S-9* 4 W-27* AD-0* AD-* 6 L-6 Screen, atmosphere vent 8-2 x SEMS (8) Cover assy., secondary: C-6, P-0, S2-2, W-27, S7-4 Washer, hand primer Diaphragm assy., secondary, hydrin: D-0, P2-6, P2-4, R2-4 (2) Diaphragm assy., secondary, silicone: D-, P2-6, P2-4, R2-4 (2) Lever, secondary 7 S4-2* Seat, secondary (new) 8 P-7 Pin, secondary lever fulcrum 9 S2-92 Spring, secondary regulator (blue) 0 S-9 C x SEMS (6) Cover, primary diaphragm 6 S-9* 7 C x SEMS () Cover, water passage 8 G-8* Gasket, water passage 9 S x SEMS (2) 20 P-4 Pin, primary valve 2 G-9 Gasket, vaporizing chamber 2 S-* 24 S4-8 2 S4-2* 26 S x SEMS (9) Seat, primary Seat support, primary Spring, primary valve AC-6 2 S2-92 Spring, primary regulator ( 2) AD-2* Diaphragm assy., primary: D-2, P2-, P2-6, R2-0 (2) 4 AB-7 Body assy,: B-7, J-8 P- Plug, pipe, hex head (2) 22 AC-64 Cover, vaporizing chamber: C-64, J-7 27 ASH-2-8 Bushing assy., fuel inlet: B-2, R-4 28 AF4-22 Fuel inlet, / 8" flare x / 8" NPT, 90, w/retainer (optional) NOTES: In colder climates, the Model L vaporization capacity will be reduced by 20% during WOT operation. Due to lower rate of water flow in industrial application, Model L is rated at 200 H.P. in these installations. * Indicates repair kit components. Repair Kits RK - L RK - L - 2 Buna Silicone 296

5 Impco Model E & PE Series 2 H.P. LP Gas H.P. Ratings Two-Stage Converters Ref. S7- Screen, atmosphere vent 2 S-* AC-22-4 W-27* AD-4-* AD-2* 6 AL * 0-24 x SEMS (8) Cover assy., secondary: C-22-, P-0, S2-2, W-27, S7-4 Washer, hand primer + Diaphragm assy., secondary, hydrin: D-4-, P2-6 (2), L2-, R2- (2) + Diaphragm assy., secondary, silicone: D-2, P2-6 (2), L2-, R2- (2) Lever, secondary S Seat, secondary (new) 8 S2-22 S2-2*** Spring, secondary regulator (blue), standard Spring, secondary regulator (orange), optional 9 P-7 0 S-40* S-9* 2 C-20 Pin, secondary lever fulcrum 0-24 x SEMS (2) 2-24 x 7 SEMS (7) Cover, primary diaphragm S2- Spring, primary regulator ( 2) 4 AD- Diaphragm assy., primary: D-, L-4, P2-8, R2- () P- Pin, primary valve 6 AB-20 Body, regulator, E series: B-20, J- 7 G-7* 8 F-* Gasket, regulator body Sponge 9 S4-7* Seat, primary 20 AB-9- Body assy., heat exchanger: B-9-, J-7, P-, P- 2 P-* Plug, pipe, hex head (2) 22 P- Plug, pipe, brass, water drain 2 G-* 24 C-2 2 S-* Gasket, heat exchanger cover Cover, heat exchanger 0-24 x SEMS (9) NOTE : ** Two vapor outlet pressures are available. Orange secondary spring gives negative 2" water column. Blue secondary spring gives negative 2" water column. To change any B regulator to O, change blue secondary spring to orange. Due to lower rate of water flow in industrial applications, Model E is rated at 200 H.P. in these installations. * Indicates repair kit components. + For Model E only NOTE 2: PE Series does not carry UL approval. Repair Kits RK - E RK - E - 2 Buna Silicone 297

6 Carburetors Impco Model CA Standard Series Carburetors for Natural & LP Gas Impco s CA Series carburetors are offered in four design variations, providing proven, effective solutions for optimum metering and delivery of either alternative fuel or, in dualfuel configurations, gasoline in engines up 7 horsepower. The standard model, shown beginning on this page, can be mounted in either an updraft or downdraft orientation, feeding either LPG or natural gas to engines from. to 70 horsepower. The maximum flow rate is cfm. Various SAE flanges and airhorn sizes are available. 298

7 Impco Model CA Standard Series Ref. S-74 Idle Screw Carburetors 2 2 S Spring, Idle Screw P Plug, Pipe AB--C AB--2C AB--C AB--4C AB--C AV-492 AV R S2-4 8 P Air Horn Assy: B-; V2-29; W-4; W-; W-4; P-8 Air Horn Assy: B-; V2-29; W-4; W-; W-4; P-8 7 Air Horn Assy: B-; V2-29; W-4; W-; W-4; P-8 2 / 6" Air Horn Assy: B-; V2-29; W-4; W-; W-4; P-8 Air Horn Assy: B-; V2-29; W-4; W-; W-4; P-8 Air Valve Assy (std.): S4-2; V2-0; V-4694-; W-4697 Air Valve Assy (lean): S4-2; V2-0; V ; W-4697 Sealing Ring, Air Valve Spring, Air Valve A Check-Valve Plate Assay: P2-4699; B G-92 0 P4- Gasket, Throttle Body to Mixer Piston, Idle Cutoff S2-44 2* S- Spring, Idle Cutoff 0-24 X SEMS (4) 8 S-69 Screw -28 X / 6 " (2) T2-24 Throat, SAE flange 4 T2-2 Throat, SAE flange T2-26 Throat, " SAE flange 9 T 2-27 Throat, SAE flange P- Pin, Throttle Stop 0 6 S X SEMS (2) 7 F2- Fly, F2- Fly, F2-2 Fly, " F 2- Fly, 8 S-6 Throttle Shaft, dia. B2- Bearing, Oilite, i.d. (2) 9 B2-6 Bearing, Needle, i.d. (2) 20 S-8 Seal, shaft (2) 2 R-9 Ring, Seal Retainer 22 AL-8-2 L-8 24 S-2 2 S2- Throttle Stop Assy, i.d. : L-8, S2-; S-2; S-8 Throttle Stop Lever Stop 0-2 X Spring, Idle Stop Screw S-8 Screw Pin, Throttle Stop 27 AL-7- Throttle Lever w/screw: L-7-; S-7 28 L-7- Throttle Lever S X G-9 Gasket, flange G-6 Gasket, flange G-7 Gasket, " flange G -8 Gasket, flange 299

8 Carburetors Impco Model 00 Series Natural, LP Gas Standard Carburetors 00

9 Impco Model 00 Series Carburetors F. ig. No. No S- 2 C-7 S2-8 4 S-22 P D-7 D R-9 8 V x SEMS (4) Cover Spring, air valve -2 x SEMS (4) Plate, backup Diaphragm Diaphragm, silicone Ring, air valve T2- Throat, SAE flange T2-2 Throat, " SAE flang B Air gas valve assy.: V-4, S4-2, V2-7 9 AV-4 Valve and diaphragm assy., complete (refer to chart for correct air gas valve) 0 AB-8- to- Body assy.: B-8, V2-6, W-2, W-, W-4, R-2, P-8, S-69 S-69 Screw - 28 x / 6" (2) 2 S-74 idle S2-88 Spring, idle screw 4 P- Plug, pipe G- Gasket, throttle body to mixer 6 S x /8 " SEMS (4) T 2- Throat, SAE flange 7 T 2-4- Throat, SAE flange T 2-4- Throat, SAE flange T 2-6 Throat, and SAE flange, short T 2-2 Throat, SAE flange, short 8 P - Pin, Throttle Stop (2) S- Throttle shaft dia. (T2-, T2-2) 9 S -2 Throttle shaft, /6" dia. (T2-, T2-4-, T2-4-, T2-6, T2-2) F2- Fly, F2-2 Fly, " 20 F 2- Fly, F 2-4 Fly, F 2- Fly, S x SEMS (2) 2 S x / 6" SEMS (2) B2- Bearing, Oilite, i.d. (2) B2-2 Bearing, Oilite, / 6" i.d. (2) 22 B2-6 Bearing, Needle, i.d. optional (2) B2-7 Bearing, Needle, / 6" i.d. optional (2) S-8 Seal, shaft (2) 2 S-9 Seal, / 6" shaft (2) S-2 Seal, internal, / 6" I.D., optional (2) 24 R-9 Ring, Seal Retainer ( 2) AL-8- Throttle Stop Assy, i.d.: L-8-, S2-; S-2; S-8 2 AL-8-2 Throttle Stop Assy, / 6" i.d.: L-8-2, S2-; S-2; S-8 L-8- Throttle Stop Lever, I.D. 26 L-8-2 Throttle Stop Lever, / 6" I.D. 27 S2- Spring, Idle Stop Screw 28 S-2 Stop 0--2 x 29 S-8 Pin screw, throttle stop 0 AL-7- Throttle Lever, short, w/screw: L-7-; S-7 AL-7- Throttle Lever, long, w/screw: L-7-; S-7 G-6 Gasket, flange G-7 Gasket, " flange G -8 Gasket, flange G -9 Gasket, flange G -2 Gasket, flange G -6 Gasket, - flange 0

10 Carburetors Impco Model 2 Series Natural, LP Gas 02

11 Impco Model 2 Series Carburetors Ref. G S- 4 C-26 S2-8 6 S-22 7 P Gasket, mixer to air horn S - 20 x " SEMS D-7 D R-9 0 V x SEMS (4) Cover, Air valve Spring, Air valve 6-2 x SEMS (4) Plate, backup Diaphragm Diaphragm, silicone Ring, air valve T2- Throat, SAE flange T2-2 Throat, " SAE flang T 2- Throat, SAE flange 9 T 2-4- Throat, SAE flange T 2-4- Throat, SAE flange T 2-6 Throat, and SAE flange, short T 2-2 Throat, SAE flange, short 20 P- Pin, Throttle Stop ( 2) S- Throttle shaft, dia. (T2-, T2-2) 2 S-2 Throttle shaft, /6" dia. (T2-, T2-4-, T2-4-, T2-6, T2-2) F2- Fly, F2-2 Fly, " 22 F 2- Fly, F 2-4 Fly, F 2- Fly, S x SEMS (2) 2 S x / 6" SEMS (2) B2- Bearing, Oilite, i.d. (2) 24 B2-2 Bearing, Oilite, / 6" i.d. (2) B2-6 Bearing, Needle, i.d. optional (2) 2 B2-7 Bearing, Needle, / 6" i.d. optional (2) S-8 Seal, shaft (2) 26 S-9 Seal, / 6" shaft (2) S-2 Seal, internal / 6" I.D., optional (2) 27 R-9 Ring, Seal Retainer ( 2) AL-8- Throttle Stop Assy, i.d.: L-8-, S2-; S-2; S-8 28 AL-8-2 Throttle Stop Assy, / 6" i.d.: L-8-2, S2-; S-2; S-8 L-8- Throttle Stop Lever, I.D. 29 L-8-2 Throttle Stop Lever, / 6" I.D. 0 S2- Spring, Idle Stop Screw S-2 Stop 0--2 x 2 S-8 Pin screw, throttle stop 4 B Air gas valve assy.: V-4, S4-2, V2-7 AV-4 Valve and diaphragm assy., complete (refer to chart for correct air gas valve assembly) 2 S x / 6" () AB-2 Body assy.: B-2, V2-6, W-2, W-, W-4 4 S-28 Idle Screw S2-6 Spring, Idle Screw 6 P- Plug, pipe, brass 7 G- Gasket, throttle body to mixer 8 S x /8 " SEMS (4) AL-7- Throttle Lever, short, w/screw: L-7-; S- AL-7- Throttle Lever, long, w/screw: L-7-; S- G-6 Gasket, flange G-7 Gasket, " flange G -8 Gasket, flange G -9 Gasket, flange G -2 Gasket, flange G -6 Gasket, - flange 0

12 Carburetors Impco Model 200 Series - Natural & LP Gas Standard Carburetors NOTE: () DG (digester gas) carburetors reduce air flow 0% 04

13 Impco Model 200 Series Carburetors Ref. S- 2 C-8 S2-7 4 S2-2 P2-2 6 D-6- D R-7 8 V x SEMS (4) Cover Spring, Air valve 8-2 x / 6" SEMS (4) Plate, backup Diaphragm Diaphragm, silicone Ring, Air Valve B Air gas valve assy.: V-2, S4-9, V2-6 9 AV-2 Air gas valve assy., complete with diagram (refer to chart for correct air gas valve assembly) A B-- Body assy., 2 air horn: B--, V2-0, W-8, W-9, W-20, R- 0 A B--2 Body assy., / 6" air horn: B--2, V2-0, W-20, W-8, W-9, R- S-69 Spring, Idle Screw 2 S-28 Idle G-2 Gasket, throttle body to mixer 4 S x /8 " SEMS (4) P- Plug Pipe T Throat, SAE Flange 6 T 2- Throat, SAE Flange T2-6 Throat, 2" SAE Flange 7 P- Pin, Throttle Stop ( 2) S-2 Throttle Shaft, / 6" dia. (T2-4-2) 8 S- Throttle Shaft, dia. (T2-, T2-6) F 2-4 Fly, 9 F 2- Fly, F2-6 Fly, 2" T 2-6 Throat, & SAE Flange, Short T 2-2 Throat, SAE flange, short 20 S x / 6" SEMS (4) B2-2 Bearing, Oilite, / 6" i.d. (2) 2 B2- Bearing, Oilite, i.d. (2) B2-7 Bearing, Needle, / 6" i.d. optional (2) 22 B2-8 Bearing, Needle i.d. optional (2) S-9 Seal, / 6" shaft (2) 2 S- Seal, shaft (2) 24 S-20 Seal, internal, I.D., optional R-9 Ring, Seal Retainer, / 6" shaft (2) 2 R-8 Ring, Seal Retainer, shaft (2) AL-8-2 Throttle Stop Assy, / 6" i.d.: L-8-2, S2-; S-2; S-8 26 AL-0 Throttle Stop Assy, i.d.: L-0, S2-; S-2; S-8 L-8-2 Throttle Stop Leve, r / 6" I.D. 27 L-0 Throttle Stop Lever, I.D. 28 S2- Spring, Stop Screw 29 S-2 Stop 0--2 x 0 S-8 Pin screw, throttle stop 2 4 AL-7- Throttle Lever, with: S-7, L-7- AL-9- Throttle Lever, with: S-26, L-9- L-7- L-9- S-7 S-26 Throttle Lever Throttle Lever 0-24 x 2-24 x G -9 Gasket, flange G -2 Gasket, flange G-24 Gasket, 2" flange 0

14 Carburetors Impco Model 22 Series -V - Natural & LP Gas Standard Carburetors NOTES: () Order air cleaner assembly separately. (2) Order air horn separately, refer to optional equipment for specific air horn. Model 22 Series - Standard Carburetors 2V- Natural & LP Gas NOTES: () Order air filter separately. (2) Refer to optional equipment for dimension information. 06

15 Impco Model 22 Carburetors Ref. G S- 4 C-2 S2-7 6 S-2 7 P2-2 8 Gasket, mixer to air horn S -20x" SEMS D-6- D R x SEMS () Cover, Air valve Spring, Air valve 8-2 x / 6" SEMS (4) Plate, backup Diaphragm Diaphragm, silicone Ring, air valve BV-2 Air gas valve assy., propane: V-2, S4-9, V2-6 0 DV-2 Air gas valve assy., natural gas: V-2, S4-9, V2-7 AV-2 Air gas valve assy., complete with diagram, propane CV-2 Air gas valve assy., complete with diagram, natural gas 2 AB-2 Body assy., B-2, V2-0, W-8, W-9, W-20 S2-6 Spring, idle screw 4 S-28 idle screw S-69 /4 "-28 x / 6" () 6 P- Plug, /8 " pipe, brass 7 G-2 Gasket, throttle body to mixer 8 S x /8 " SEMS (4) T Throat, SAE flange 9 T 2- Throat, SAE flange T2-6 Throat, 2" SAE flange 20 P- Pin, Throttle Stop ( 2) S-2 Throttle shaft, / 6" dia. (T2-4-2) 2 S- Throttle shaft, dia. (T2-, T2-6) F 2-4 Fly, 22 F 2- Fly, F2-6 Fly, 2" 2 S x / 6" SEMS (4) B2-2 Bearing, Oilite, / 6" i.d. (2) 24 B2- Bearing, Oilite, i.d. (2) B2-7 Bearing, Needle, / 6" i.d. optional (2) 2 B2-8 Bearing, Needle, i.d. optional (2) S-9 Seal, / 6" shaft (2) 26 S- Seal, shaft (2) 27 S-20 Seal, internal, I.D., optional R-9 Ring, Seal Retainer, / 6" shaft (2) 28 R-8 Ring, Seal Retainer, shaft (2) AL-8-2 Throttle Stop Assy, / 6" i.d.: L-8-2, S2-; S-2; S-8 29 AL-0 Throttle Stop Assy, i.d.: L-0, S2-; S-2; S-8 L-8-2 Throttle Stop Lever, / 6" I.D. 0 L-0 Throttle Stop Lever, I.D. S2- Spring, Stop Screw 2 S-2 Stop 0--2 x S- Pin screw, throttle stop AL-7- Throttle Lever, with: S-7, L-7- AL-9- Throttle Lever, with: S-26, L-9- S-26 S-7 L-7- L x 0-24 x /6" Throttle Lever G -9 Gasket, flange G -2 Gasket, flange G-24 Gasket, 2" flange 07

16 Carburetors Impco Model 00A Series Natural & LP Gas for Dual Fuel Standard Mixers Complete mixer with 4" air filter Complete mixer without air filter Complete mixer with 0" air filter 08

17 Impco Model 00A Series & 0 Carburetors Ref. S- 2 P-2 E-4 4 G-2* * * R-9 6 S- 7 E-4-8 S x SEMS () Plug, idle adjustment A Elbow with power adjustment: E-4, V2-9, W-2, W-4, W- *+ Gasket, gas elbow *+ Ring, seal retainer *+ Seal, idle screw B Elbow assy., complete: P-2, AE-4, R-9, S- idle adjustment S4-2 * Seat, gas valve (CA00A only) 9 S Seat, gas valve (CA00A-0 only) V2- Valve, gas metering (CA00A only). Refer to chart for correct gas valve 0 V2-9 Valve, gas metering (CA00A-0 only). Refer to chart for correct gas valve S2- Spring, gas valve A V2- + Gas valve assy., complete: S-, S4-2, V2-, S2- (CA00A only) 2 A V2-9 + Gas valve assy., complete: S-, S4-20, V2-9, S2- (CA00A-0 only) S x " ( ) 4 N- * + Nut, dome 0-24 ( ) W-2 + Washer, No. 0 light flat ( 6) 6 G- * + Gasket, filter cover 7 R2- + Rivet, vent valve 8 V- + Valve, cover vent C-2 Cover, diaphragm (CA00A only) 9 C-2- Cover, diaphragm (CA00A-0 only) A C-2 Cover assy., diaphragm with vent valve: R2-2, V-, C-2 (CA00A only) 20 A C-2- Cover assy., diaphragm with vent valve: R2-2, V-, C-2- (CA00A-0 only) 2 S2- + Spring, air valve 22 S- 8-2 x / 6" SEMS (4) 2 P2- Plate, diaphragm backup D-- * Diaphragm, air valve 24 D--2 * Diaphragm, air valve, silicone 2 G- * Gasket, air valve 26 R- Ring, air valve 27 BV- Valve, air metering: V-0, L-, B L- * Lock, nylon idle adjustment AV-0- + Air valve assy., complete with diaphragm: S-2 (6), P2-, D--, G-, R-2, V-0, L-, B-24 (CA00A only) 29 AV Air valve assy., complete with silicone diaphragm: S-2 (6), P2-, D--2, G-, R-2, V-0, L-, B-24 (CA00A & CA00A-0) R- Ring, diaphragm support (CA00A only) 0 R-40 Ring, diaphragm support (CA00A-0 only) S x hex head SEMS () 2 S x SEMS () C2- Clamp, Boden wire 4 S x SEMS () A B-2 Base assy., complete: L-2, B-2, S2- (), P- () (CA00A only) B B-2 Base assy., complete: L-2, B-2, S2- (), P- () (CA00A only) 6 N- Nut, square, S-69 x /6" (plug) 8 7C2-2 Cam assy.: C2-2, W-2, S-7 * Indicates components of minor repair kit. + Indicates components of major repair kit. Repair Kits RK00MI - /20-2 RK00MI - 0/70-2 RK00MA - /20-2 RK00MA - 0/70-2 Minor repair kit Major repair kit 09

18 Carburetors Impco Model 42 Series Standard Carburetors for Natural & LP Gas () Reference diagram pg. (2) Indicates silicon diaphragm (42-V Illustrated) 0

19 Impco Model 42 Series - 2V Carburetors Ref. G-66 2 S- C-0 4 S2-0 S-22 6 P D-8 D-2 8 G-02 9 V-6 Gasket, air horn 0-24 x SEMS () Cover, Air valve diaphragm Spring, Air valve 6-2 x SEMS (4) Plate, backup Diaphragm, air valve Diaphragm, air valve, silicone Gasket, air valve B Air gas valve: V-6, V2-9, S4-4 0 AV-6 Air gas valve assy., with diaphragm (refer to chart for correct air-gas valve assembly) AB-27 Body assy.: B-27-2, C-29, J-9, S-0, S2-6, W-, S-27, V2-8, P- (), S-69 (), J- 2 S x / 6" (4) P- Plug, pipe () 4 S4- Seat, idle screw AD-28-- Idle diaphragm assy.: D-28, G-6, L-0, P2-2, R2-4 (2), S4-6 G-6 Gasket, idle diaphragm 7 S2-24 Spring, idle valve 8 C- Cover, idle valve 9 S x /8 " SEMS (4) 20 S2-89 Spring, idle adjustment 2 S- 0-2 x /4 ", idle adjust 22 G-74 Gasket, mixer to adapter 2 A-47 Adapter, mixer to throttle body 24 S x SEMS (4) 2 G-2 Gasket, adapter to throttle body 26 B-24 Body, 2B throttel 27 P-6 Pin, Throttle stop ( 2) 28 P- Plug, /8 " pipe 29 P- Plug, pipe 0 S x SEMS (4) S- 0-2 x / 6" SEMS (2) 2 F2-0 Fly, 2B S-4 Throttle shaft, 7 / 6" dia. B2-4 Bearing, Oilite, 7 / 6" i.d. (2) 4 B 2-9 Bearing, needle (optional), 7 / 6" i.d. (2) S-2 Seal, 7 / 6" shaft (2) S -9 Seal, internal (optional) 7 / 6" i.d. (2) 6 R- Ring, Seal Retainer ( 2 7 AL-- Throttle Stop Assy., 7 / 6" i.d. : L--, S2-; S-2; S-8 8 L-- Throttle Stop lever, 7 / 6" i.d. 9 S2- Spring, stop screw 40 S-2 Stop screw, 0-2 x 4 S-8 Pin screw, throttle stop 42 AL-2- Throttle Lever, long, with screw: L-2-, S-2 4 L-2- Throttle Lever, long 44 S-2-20 x 7 hex head 4 G-44 Gasket, throttle body to flange 46 B T2- Flange, 2B, with gasket B T2-2 Flange, 2B, with gasket BT2- Flange, Holley 2B, with gasket B T2- Flange, GMC 2B, with gasket 47 S x SEMS (4) 48 G -4 Gasket, 2B Flange G -46 Gasket, 2B Flange G-47 Gasket, Holley 2B Flange G -49 Gasket, GMC 2B Flange

20 Carburetion - Vacuum Fuelock Filter Impco Model VFF0 Series 2 H.P. - LP Gas Ref. S x SEMS (6) 2 C-7 Cover, diaphragm (VFF0 only) BD-27 Diaphragm assy., silicone: D-27, P2-28 (2), R2-4 (2) 4 S (2) F-2 6 L-9 7 W-42 Fulcrum Lever, valve operating Washer, seal retaining 0 S4-8 P- 2 S-42 S S-2 S7-6 F-0 Seat, valve Pin, valve operating Seal, O-ring Spring, valve 8-2 x / 6" SEM Screen, filter backup Filter S 8 AB-4 Body assy.: B-4, J-8 9 S- -20 x SEMS (2) 7 AF-0 Filtering assy., F-0, S7-8 G-89 9 C-8 20 S-00 Gasket, filter cover Cover, filter 2-24 x SEMS (0) NOTE: O-ring must be secured with washer when service is required. Washer is installed through LP-gas outlet and locked in slot by pin. Silicone grease will let pin slide easily. Be sure to properly lubricate "O" ring. Refer to Service Manual for further information. Repair Kit RK - VFF0-2 Vacuum Fuelock-Filter Repair Kit 2

21 Carburetion - Adapter System Unidapt Impco s modular carburetor adaptor system, Light-weight die-cast components for custom-fit installation of Impco CA 2 and CA 00A series mixers. The modular system offers selection and combination of interchangeable components to satisfy most space requirements and gasoline carburetor air horn size. CA7 & CA00 Adapter, Unidapt mixer A- Adapter, to CA 2 series mixers AA-7 Adapter assy, A-7 hood, G- gasket, S- screws ( 4) AA-9 Adapter assy, A-9 wedge, G- gasket, S- screws ( 4) AA-60 Adapterassy,A-60extension,G-gasket,S-screws( 4) A-62 Adapter, to air horn A-6 Adapter, to /8 air horn A-8 Adapter, to Toyota air horn A-4 Adapter, to air horn A - Adapter, 2 air horn A-6 Adapter, to 2 / 6" air hor n A-6 Adapter, to CA-00A series mixers

22 Carburetion - Adapters A Series Adapters 00A and 7A mixers to gasoline carburetor air horn. A dapter D ia. A Ht. B A-- 4 / 6" 00A &7A to 4 / 6" air horn A A & 7A to Chevrolet V8 duplex air horn A-6 / 6 " 7 / 6" 00A & 7A to duplex air horn A-6-00A & 7A to air horn (Gann A9-20) B A A & 7A to air horn (Gann A9-2) A-9 AA A & 7A to 2 air horn, high profile 00A & 7A to 2 air horn, w/clamp nuts. A-8, N-2(), S-2() A-4 2 / 6" 00A & 7A to 2 / 6" air hor n 00A & 7A to A-0-2 air horn offset; For GM & Chrysler requires spacer A2-7 A A to gasoline carburetor with air horn A Center Stud Air Horn AA-64-00A & 7 A to 982 & later Ford.0L throttle body EFI (Gann A9-26) AA2-46 Adapterassy. 90degrees, "toca42m(lowprofil e) AA Adapter assembly, 90 degrees, " CS to CA42M 4

23 Impco AF Series Carburetion - Air Filter Assemblies *Filter assembly fits on mixer. Add approximately 8" to height for stud and nut. Impco Accessories Vacuum Power Valve Vacuum Control Solenoid VPV Vacuum power valve VCS Vacuum control solenoid Start Assist Valve SV Start Assist Valve Electric Primer Electric solenoid for remote priming of Impco models E, J, or L and OHG X- or X-2 converters Electric primer

24 Carburetion - Accessories Beam Converter T0-B T60-B A small LP Gas regulator for up to 40HP combining primary and secondary section in a single unit for air-cooled engines-small industrial trucks-small stationary engines-generators-pumps-mixers-cranes Vaporizer/regulator for up to 60 horsepower for water For forklifts, farm tractors and small industrial engines cooled engines; Repair s 60-RK Repair kit for Model 0 and Model 60 convertor Beam Lockoffs L-46 LPG lockoff specify 6V-2V DC, female inlet x male outlet. FL-206 Gasoline lockoff specify 6V-2V DC x female pipe thread. (replaces GT-622) Repair s B-27 2V coil for L-46 L-46 L-42 Plunger assembly for L-46 Repair Kits for Obsolete Beam Converters 400-R-K Minor Repair kit for model 400-B 400B-RCK Major Repair kit for model 400-B 20A-RK Repair kit for model 20 convertor Filters & Solenoid Valves F-20 Filter only for LPG female inlet x male outlet. FL-28 Filter & solenoid valve for under 200 C.I.D. engines FL-48 Filter & solenoid valve for over 200 C.I.D. engines F-20 FL-28 FL-48 6

25 Carburetion - Century Fuelocks Century Fuelocks 284B Filter fuelock for LPG FNPT in/out, 2V. Chamois pack filter Replacement filter kit for part 284B 24A Fuelock for gasoline. FNPT in/out Replacement coil for part 24A, 2 volt 24 Fuelock for LPG forklift application. MNPT x FNPT, 2V Replacement coil for part 24, 2 volt 284B 24A Repair Kits For Century Fuelocks 0-6 For Fuelock Repair kit with plunger B Coil only, 2V 2-29 Coil & cover assembly, 2V Replacement coil & cover, 2V A Replacement coil & cover, 2V Universal Bulkhead 26 Universal bulkhead - Filter for LPG. Two openings for inlet side to accomodate hydro stat relief valve. 2 V. Chamois pack filter Replacement filter kit Approved Vacuum Switch 40-0 Vacuum switch will not allow LPG lock-off to open until engine is running or cranking. 7

26 Carburetion - Century Converters Century Converters Century offers a complete line of straight fuel carburetors for highway and industrial use. Call for additional information on your particular application. Additional literature is available. Century offers a full range of converters to cover every application need. These converters can be used for either straight fuel or dual fuel installations. All units are available with solenoid primer. Model G-8 Repair Kit Model M-6 2B Applications up to 8 HP Model G-8A Model H Century Converter Repair Kits For Convertor Model H M G M6 Century Speed Control Can be used for any application where a consistent fast idle speed is repeatedly required. It is designed especially to control engine speed while pumping from a bulk truck B Century Speed Control 8

27 Gann Adapter Systems Carburetion - Gann Adapter Systems A9-40 Inlets Has two 2 diameter inlets for connection to OEM air box. " high. Nylon/composite material. How Gann Adapter Systems Work... CA-42 A9-6 A9-40 X-40 A9-9

28 Carburetion - Gann Adapters Gann Adapters A9-2 Mounts the Impco CA-22 to TB9- throttle body. Nonoffset to facilitate installations where air cleaner is a problem. high A9-6 Mounts the CA-00A dual fuel mixer to the Impco CA-22 bolt spacing. Gasket and screws provided. 2 high A9-9 CA-2 to CA-22 bolt pattern. high A9- Mounts to TB9- throttle body for Impco CA-42 application. Can not be used on original gasoline throttle bodies. Has primary vacuum port. Gasket and screws provided. 7 high A9-7 Mounts CA-00A to Ford Motorcraft carburetor by removing the original air horn and replacing with this adapter. Gasket and screws provided. high A9-20 Mounts Impco CA-00A to existing gasoline carburetor with a airhorn. high A9- Mounts the CA-00A dual fuel mixer to the Impco CA-42 bolt spacing. Gasket and screws provided. high A9-8 Mounts on CA-2 carburetor and provides for the mounting of the original air cleaner on GM V-6 engines. 2 high A9-2 Mounts the CA-00A to existing gasoline carburetor. 2 high 20

29 Gann Adapters Carburetion - Gann Adapters A9-22 Mounts the Impco CA-00A to existing gasoline carburetor with a airhorn. 2 high A9-28- Fits GM-220 fuel-injected carburetors including.0l,.7l and 7.4L. Mounts Impco CA-42 on gasoline throttle body. Allows use of original air cleaner. A9--2 Allows installation of Impco CA-00A on GM fuel injection throttle body. For straight LPG/NG applications. Comes with gasket. A9-26 Adapts Impco CA-7 and CA-00A to Ford port-injected engines. A9-29 Allows the use of the OHG X-40 on any gasoline carburetor with a air horn when combined with Gann adapters A9-20, A9-2 or A9-22. Steel. A9-2 Mounts Impco CA-42 on gasoline throttle body with original air cleaner. Fits 990 GMC, 66 and 427 c.i.d. fuel injection. A9-27 Connects Impco CA-00A to air induction system on Ford port-injected systems large and small hosed Plastic/nylon composition. A9-0 Mounts Impco CA42 on TB9-. Screws and gasket included. A9-4 Nylon/plastic air shroud connects the dual-hose OEM air induction system to an X-40 or CA-42 mixer. 2

30 Carburetion - Gann Adapters Gann Adapters A9- Mounts Impco CA-22 on Ford.0L EFI engines. 4 degree adapter mounts mixer on mass air flow sensor in horizontal position. Mounting screws included. Recommended air filter: F9-4 A9-7 Mounts Impco CA-22 on Ford 4.0L EFI engines. 4 degree adapter mounts mixer on mass air flow sensor in horizontal position. Mounting screws included. Recommended air filter: F9-4. A9-4 Adapts OHG X-40 mixer to GM throttle bodies for dedicated UG/NG conversions. high. A9-6, AA9-6 Allows in-line mounting of CA42 mixer on Ford V-8 EFI engines. Two 2 diameter hose inlets. A9-6 adapter only, AA9-6 adapter w/ gasket and screws A9-8, AA9-8 Adapter fo large Ford port injection engines, providing two-hole (2 diameter) inlets to CA42. Has two NPT bosses for vent line. A9-8 adapter only, AA9-8 w/ adapter & screws. A9-44 Mounts 00-A off-center on air horn in GM throttle body applications. high. A9-42 Allows use of Impco 200 IFB mixer on 4.6L EFI Ford/Lincoln/Mercury products. Brass fitting included to create branch tee for idle speed control. Mixer must be drilled and tapped -20 for VF-2 vacuum port. 2" high. 22

31 Gann Adapters Carburetion - Gann Adapters A9-4 Connects dual-hose Ford intake to direct. CA-00A. Plastic. A9-49 Allows use of CA22 on Ford.0/.8-liter engines. Cast aluminum. AA degree adapter to connect 4" hose to air horn. Cast aluminum. A9-46 Connects dual-hose Ford intake to 22. Molded plastic. A9-0 Mounts OHG X-40 mixer on GM vehicles with air horns such as 4.-,.0, and.7-lite r trucks and vans. Mounts on either single stud or dual stud throttle bodies. 2 high AA9-4 Right-angle mounting of CA-42 on air horn 4 high A9-48 Mounts CA22 on 4.9-liter Ford engines. Cast aluminum. A9-0-2 Mounts X-40 on GM vehicles with air horns in dedicated conversions. Same applications as A9-0, but low profile. 7 high. AA9-90 degree mounting of Impco CA-42 on air horn. taller than A high 2

32 Carburetion - Gann Adapters Gann Adapters AA degree mounting of Impco CA-42 on air horn. Offset, low profile. A9-8 Adapts OHG X-40 to or single hose. Steel. " high A9-60-X40 Allows use of OHG X-40 on Dodge V-0 engines. Two-part cast aluminum adapter; simply mount the X-40 on the top half, mount the bottom half on the throttle body, then assemble the two halves. Gaskets and hardware included. " high A9-7 Aluminum bonnet connects Ford single-hose. " intake to either X-40 or CA-42. A9-9 Adapts CA-42 to or single hose. Steel. " high. A Allows use of Impco CA-42 on Dodge V-0 engines. Same style as A9-60-X40 above. Gaskets and hardware included. " high AT9- GM Quadrajet to Impco CA-42. Mounts the OHG X-40 to TB9-8 throttle body and any existing throttle body utilizing the Impco CA-42 bolt spacing. Has vacuum port for distributor. Gasket and screws provided. high 24

33 Carburetion Fittings Nylon Elbows Nylon Straight Hose - NPT EN x 4 EN x 84 EN " x 86 EN " x 88 EN " x " 08 EN x " Hose - NPT SN x 86SN " x 88SN " x " Nylon Crankcase Vent Fitting Assembly Hose - NPT 4EN-2 x Nylon Fuel Pump Plate Gasket is included. 622 N Hose - NPT bolt center 2

34 Carburetion - Gann Hose Fittings Zinc Straight Hose Nipples Zinc material, die-cast and machined. Brass Straight Hose Nipples All brass fittings produced from extruded bar stock. Hose - NPT 86 SZ* " x 86 SZ* " x" Zinc Hose - NPT SB* x 4 SB* x AIso available in nylon Brass Zinc Hose Elbows Die-cast, machined zinc material unless otherwise noted. Crankcase Vent Fitting Assemblies Illustrated is the Impco 00 Mixer with Gann 4EN-2 fitting to adapt crankcase ventilator hose. Includes 2 jam nuts and gasket. Zinc material unless otherwise noted. Brass Zinc & Nylon Brass Hose Elbows All brass fittings produced from extruded bar stock. 26

35 Carburetion - Miscellaneous Fittings Plastic Tie Straps Plastic tie strap - positive lock. 7 inches long. SST2 Positive lock, 7 inches long Compression Connector No. 68A - Tubing to male pipe. Fuel Pump Block Off Plates 622 bolt centers ( 7 / 6" thick), includes gaske t 622-N 2 bolt centers includes gasket 6-A 2 7 bolt centers ( 7 / 6" thick), includes gaske t N 6-A Water Hose Connections 66YN Universal water Y x (nylon) 66YN Clamps Range / 6" - " 70 - / 6 " / 6" - 2 Hose Clamps Worm gear clamps " GC-6 Strap Clamp 9 2" mounting hole for 8" hose 27

36 Carburetion - Miscellaneous Fittings Vapor Hose Neoprene lined, oil and heat resistant, coil wire support permits free flow regardless of degree of bend. This is a nonporous vapor hose for LP gas and natural gas. Vacuum Hose I. D / 6 " I. D. CVH-08 CVH-00 " CVH-4 Vacuum Y NOTE: CVH-00 available in 2ft. or 0 ft. coils Water Heater Hose Single braid of nylon reinforcement, oil and grease resistant. Bulkhead Fittings T44 /4 " NPT 2 ways x flare T444 " T" NPT ways STF- PV-866 Straight bulkhead fitting flare x flare Bulkhead tee w/ relief selpac STF- T44 T444 PV-866 Stainless Steel Wire Braid Hose and Fittings Developed for applications wherever a strong, corrosion resistant LPGas hose is desired. The special low extract tube handles propane or butane in liquid and gas form. WARNING!!: For LP and Natural Gas use only! Do not use in anhydrous ammonia or refrigeration applications! Do NOT use male swivel couplings or any type of couplings that use O-Ring sealing surfaces! U.L. 2 Dayco. Series 724 w/cloth cover Size I.D. Number SS2UL-4 /6" SS6-UL /2" SS2UL-8 SS2UL-0 Use only with Parker/Dayco series BN hose end fittings. Hose Ends for Parker/Dayco (Series 724) wire braid hose. Hose I.D. Flare Size Coupling P/N Use with Hose Straight 6FS-4 SS2UL-4 /6" /8 Straight 6FS SS6-UL /6 /8 90 degree 6FS-90 SS6-UL /6 /8 4 degree 6FS-4 SS6-UL /6 /4 MNPT Straight 6-4MP SS6-UL /2" Straight 6FS-8 SS2UL-8 Straight 6FS-8-0 SS2UL-0 Straight 6FS-0 SS2UL-0 28

37 Carburetion - Miscellaneous Fittings Plastic Primary Wire Smooth finish thermoplastic insulation, stranded copper conductor. Provides good flexibility and color permanence. Impervious to oil, grease and diesel fumes. Boden Wire Control Cable C2-2 6 feet w/ chrome "T" handle (not shown) 60-blue 6 gauge 826 6/2 parallel wire, 6 gauge 86 6/ parallel wire, 6 gauge Primer Switch Heavy-duty, for either 6 or 2- volts. Has two binding head screw terminals. Mounting stem has thread, is 8" long Primer switch Rocker Switch positions, on-off-on, 6 terminals. 96-R positions, on-off-on, 6 terminals - Way Switches positions, on-off-on, screw terminals U.L. approved for amps at 2 VAC, 0 amps at 20 VAC positions, on-off-on, 6 screw terminals for 2 circuits positions, on-off-on, 6 spade terminals for 2 circuits 8264 positions, on-off-on, 9 terminals positions, on-off-on, 2 terminals Control Brackets for Dash Mounting of Controls 44A LP gas/gasoline switch bracket 244 For Boden wire and lockoff switch, 2 mounting screws included. 44 Hole diameter x x A 44 Solderless Terminals Ring terminal Push-on terminal male spade Push-on terminal female disconnect Spade or fork terminal Butt connector 9080 T-tap connector

38 Carburetion - Miscellaneous Benefits of Fresh Air Horsepower is directly related to the temperature of the air introduced into the carburetor. For every 0 F of temperature increase above 60 F you will lose % of available horsepower. The opposite is also true. Example: A vehicle producing OOHP at 60 F intake air. Reducing the air temperature to 00 F by bringing in outside air will increase horsepower by 6%. The net increase would be 6HP. Fresh Air Canisters Includes screw package, AF9-2 Impco CA 00A 4" Flexible Duct H- 4" x 48" flexible duct Fresh Air Inlet Shroud S6-4" shroud Converter Mounting Brackets All brackets include mounting hardware. GB87 GB88 GB89 NOTE: Pivot point to permit upright position on fender shield. GB9 GB80 GB86 0

39 Carburetion - Miscellaneous Remote Fill Kit 7647H SS2UL-0 SS2UL-4 6lFS-0 6lFS-4 Double check filter valve /2 " FNPT fill connectio n Wire braid hose Wire braid hose Female hose swivel Female hose swivel E-4B x x Male elbow E-0D x x Male elbow U-0E x x Male elbow 2700-R-BSS Remote fill receptacle 0DRF Fixed liquid w/ shut-off level gauge Quantity 744-A Primary adapter Note: Actual components may varydepending upon tank model and vehicle application. Please call our sales department for assistance R-KIT Pressure Relief Vents Pop-up relief vent assembly consists of nipple assembly, Iock-nut, rubber gaskets, spring and hex nut. Easily installed on a flat surface of auto body above trunk. 299-P RCP--90 Pop-up relief valve assembly- Vertical Pop-up relief valve assembly-directional

40 Carburetion - Dual Curve Integrated Processors Autotronics For Alternate Fuels & Clean Air Digital Adaptive Processing Features. Compensates for fuel variation. 2. Maintains lowest emission levels.. Provides load-sensitive ignition timing. 4. Preserves OEM diagnostics & code storage.. Maintains OEM gasoline fuel map. 6. Compensates for altitude change. 7. Produces top fuel mileage & driveability. 8. Adapts to changes in engine calibration. Ford Integrated Processor II Application The Ford Integrated Processor II, PN 96 is designed to support either dedicated or bi-fuel conversions to LPG or CNG or Ford pickup trucks with equipped with Sequential Fuel Injection (SEFI) and either Thick Film Ignition (TFI) or Distributorless Ignition (DIS) systems. s In Kit Ford Integrated Processor II 96 Wiring harness port solenoid valve Air filter for solenoid NPT orifice elbow Mounting screws Cable ties Heat shrink caps Fuel injector interface harness Quantity 4 PART NO. 96 Ford Integrated Processor III Application The PN 98 is designed to provide total conversion support for Ford Taurus or Mercury Sable.0L V-6 engines. s In Kit Quantity Ford III Integrated Processor Wiring harness port solenoid valve Foam air filter Sheet metal screws Heat shrink caps Cable ties 98 4 PART NO. 98 2

41 Autotronics GM Integrated Processor Carburetion - Integrated Processors Features All in One: Conversion Support, timing advance, & fuel control. Gasoline injector shut off relay control. Prevents false OBD codes on alternate fuel. Preserves factory gasoline computer block leam. Continuous closed loop diagnostic monitoring. Alternate fuels switching logic for system default to gasoline. Provides timing advance directly proportional to load. P arts In Kit Quantity GM integrated processor, PN port solenoid valve Air filter for solenoid NPT oriface elbow T-Tap wire splice Cable ties 7 4 CBA A B C D E F F E D C B A Male faston 2 Female faston 2 Mounting screw 4 GM OBD II Integrated Processor Application The GM OBD II Integrated Processor is designed to support dedicated and bi-fuel conversions to LPG, CNG, or LNG on 996 Chevrolet or GMC pickups equipped with the 4.L,.0L, or 7.4L Vortec engines. Use PN 92 - for bi-fuel CNG for low fuel - Auto/Switch. s In Kit GM OBD II Integrated Processor 924 Wiring Harness port solenoid 2 port high flow solenoid Foam air filter Calibrated orifice elbow Elbow without orifice Brass hex nipple NPT Cable ties Sheet metal screws Heat shrink caps Female wire lugs Molded plastic extension tab 0-2 x bolt 0-2 x nut Lock washers Quantity

42 Carburetion - Integrated Processors Autotronics Chrysler Integrated Processor Application The Chrysler Integrated Processor is designed to support dedicated or bi-fuel conversions to LPG or CNG of Chrysler Corporation vehicles equipped with longitudinally mounted engines (i.e.: engines, without electric cooling fans.) These include full size V-6 and V-8 pickups and vans, PART NO. 90 along with V-0 pickups, and Dakota pickups. s In Kit Chrysler Integrated Processor 90 Wiring Harness Three port solenoid Foam air filter Cable ties Sheet metal screws Heat shrink caps Quantity 4 A B C D D C B A A B C D E F Ford OBD II Integrated Processor Application The Ford OBD II Integrated Processor PN 944 is designed to support the conversion of the OBD II light duty trucks and cars with the IIC IV system and the 04 pin PCM to LPG, LNG, or CNG. s In Kit Ford OBD II Integrated Processor 944 Wire harness Injector wire harness Black plastic mounting tab port solenoid valve 4048 Foam air filter 2 port solenoid valve 40 Female insulated wire spade terminals Brass hex NPT nipple Heat shrink caps Orificed elbow 4049 Elbow Sheet metal screws 0-2 nut2 - lock washers 0 x 2 bolt Quantity PN 944 4

43 Carburetion - Integrated Processor Guide Autotronics This convenient guide will help you determine the correct Dual Curve components needed to convert your vehicle to alternate fuel operation. You can find the right Integrated Processor to give you maximum performance, lower emissions and great driveability for the best quality conversion. Chrysler/Dodge/Jeep Cars & Trucks Ford Cars & Trucks GM Cars & Trucks

44 Carburetion - Timing Optimizers Autotronics Ford Timing Optimizer Applications Fits Ford cars, trucks, & vans w/tfi distributor ignitions. Fits Ford cars, trucks w/dis ignitions. Note: This unit is not designed for the new EDIS ignitions found on the L and 4.6L engines. Use PN 8696 for EDIS ignitions. Features Offers selectable LPG or CNG timing curves. State of the art, factory compatible, direct plug-in design for Ford vehicles with TFI (Thick Film Integrated) distributors and DIS (Distributors Ignition System) ignitions. Fits most Ford cars, trucks, and vans with distributors or with DIS ignitions (except '90-'9 EDIS 4.0L & 4.6L engines, use PN 8696). Offers 4, 6, & 8 cylinder programming capabilities. No adjustment of the distributor during installation is required. Direct plug-in connectors mate with the vehicle's factory timing Spout connector. Employs anti-backfire logic during start-up and under load. Fits most Ford cars, trucks, and vans with distributors or with DIS ignitions (except 90-9 EDIS 4.0L & 4.6L engines, use PN 8696). Unique ability to provide timing advance directly proportional to load. Allows spark timing advance for increased vehicle performance without increasing NOx emissions when installed with the O2 Fuel Control II, PN * LPG/CNG Ford Timing Optimizer *Not for sale or use in California on pollution controlled motor vehicles, except with approved equipment. GM Timing Optimizer Features Exclusive connectors for directplug-in to MAP sensor Increases gas mileage, vehicle performance on LPG or CNG Unprecedented design provides flexible spark timing advance unlike any other unit presently In existence No timing adjustment/automatically programs 4, 6, or 8 cyl. Direct plug-in with all GM MAP sensors Allows spark timing advance for increased vehicle performance without increasing nox emissions Priced well below any other spark timing advance unit available in alternate fuel marketplace The GM timing optimizer comes complete with all necessary components and parts in one easy-to-order kit. 407 GM Timing Optimizer 6

45 Autotronics Chysler Support Applications All 992 thru 99 V-6 Dakota and 8 (ONLY) trucks and vans with MPFI. 42 Chrysler support Carburetion - Chrysler Supports & Injector Module Chysler Support IV Applications The Chrysler Support IV employs a direct plug-in design for 988-On Throttle Body Injection (T.B.I.) V-6 Dakota and V-8 8 & 60 trucks, with the O2 Sensor Support built-in. This unit will cure the Check Light and the computer memory code 26 (On Dodge) for Fuel Injector Drivers, when used with Autotronic 4046 O2 fuel controller. 424 Chrysler support IV Autotronics Chrylser OBD II Injector Module Application The Chrysler OBD II Injector Module is designed to be used along with the Chrysler Integrated Processor PN 90, the Chrysler CNG Boss PN 9, or the Chrysler Support PN 42 on 996 and beyond Chrysler Corporation vehicles equipped with.9l V-6, V-8, and V-0 engines and OBD II Powertrain Control Module (PCM). These vehicles consist of full size pickups and vans, and the Dakota pickup equipped with the.9 L engine. The PN 426 is also designed for conversions of the 996 Jeep 4.0L straight engine. 426 Chrysler OBD Injector Module YELLOW GREEN TAN GREEN BLACK BLUE TO FUEL INJECTOR 7

46 Carburetion - O 2 Fix Autotronics Superfix The super fix is designed to inform the ECM (Electronic Control Module), computer and sensors when on alternate fuels that basic computer functions are working properly. Codes, 2, 44 and 4 are directly related to problems the Super Fix can solve. Features. Supplies a Rich/Lean O2 feedback signal the ECM. Prevents O2 sensor codes (, 44, and 4). 2. Monitors ECM signals related to exhaust gas recirculation (EGR) and the fuel system, then it responds with the correct signals. Prevents false EGR performance warning code (2).. Prevents false knock sensor warning code (4) and computer limp-mode spark timing retard on alternate fuels, which leads to poor driving, low mileage, and high exhaust temperatures. The 6M is designed with direct plug-in capabilities to the engine MAP (Manifold Absolute Pressure) sensor and obtains its logic from maifold absolute pressure rather than throttle position M A Super Fix GM w/new TPV sensor. Plugs into MAP sensor (99 Caprice police cars require p/n S) Adapter cable mates the Super Fix 's single O2 sensor to the factory's double wire O2 sensor connector B Adapter cable, to oz. sensors Computer Fix The O2 Fix is designed to inform the ECM (Electronic Control Module), when on ALTERNATE FUELS that 02 sensor computer functions are working properly. When the O2 Fix is switched to gasoline mode, the proper gasoline function will be sent to the computer. All O2 sensors are the same in voltage output and switching characteristics. Most vehicles have a single wire or a -wire heated O2 sensor. We recommend the P/N * (Single Wire) O2 Fix. This unit can be adapted to any make or model vehicles O2 sensor, U.S.A. or foreign. Note: 989 Dodge Dakota and V-8 trucks use a 4-wire O2 sensor. Use only the P/N * O fix Computer Fix, single wire sensor GM cars , Chrysler cars/trucks 988-9, Ford cars/trucks

47 Autotronics O 2 Fuel Control II Carburetion - O2 Fuel Control & Mixture Monitor The O2 Fuel Control II regulates the air/fuel (A/F) mixture ratio when a vehicle is powered by alternate fuels. This control of the A/F mixture ratio is based on the voltage signals produced by the vehicle s factory O2 sensor - mounted on the exhaust system. s In Kit P art Quantity O2 air/fuel mixture control 4046 Solenoid valve Wire tap connectors Air filter for solenoid Insulated male fast-on ring lug connector Female fast on 6-pin male connector 4 x /4 self-tapping screws NPT oriface elbow Installation instructions Autotronics Mixture Monitor Application The Mixture Monitor comes with a direct plug-in cable harness, PN 4042, and will adapt to Autotronic Air/Fuel Mixture Control Products PNs: 404, 4046, and the forklift CO controller Overview The Mixture Monitor is a multi-purpose instrument designed for monitoring and tuning carbureted, fuel injected, propane or natural gas powered vehicles. The Mixture Monitor provides managers and technicians with the ability to monitor and analyze the vehicle s ideal mixture of air and fuel to ensure maximum power and low exhaust emissions. The Mixture Monitor has been designed to interface with Autotronic s Air/Fuel Mixture Controller s: 404, 4046, and the new 4047 Forklift Controller. NOTE: An optional universal harness, 404, is available to monitor other O2 sensors. The Mixture Monitor relies on the vehicle s O2 sensor to analyze the exhaust air/fuel mixture. (Vehicles without an O2 sensor can be updated by ordering the required supplement accessories from Autotronic Controls Corporation). 404 Mixture monitor 9

48 Carburetion - Motor Fuel Tanks Manchester Pick-up, In Bed Mount Tanks Large capacity bed mount tank for narrow bed pick-ups and trucks with utility bodies. Fits all makes & all years. Valves installed vertically. Gauge is visible through rear window for easy viewing. School Bus Tanks Widely used on large school buses Under Tool Box Mount Tanks For Small pick-up trucks or narrow bed full-size pick-ups. Fits most makes and most years. May require tool box to be raised. Gauge on driver s side for easy viewing. Diameter Vapor Seal Box Tanks Universal manifold tank adapts well to vehicles with recessed or sloped trunk floors. Adjustable mounting brackets on 2" tank. Requires remote fill. Slick Tanks Very popular tank for utility vans. Length W. P. W. C. LP Weight " 0.2 gal ga. l lbs. 0" " & 60" 8.0 gal. 0.4 gal. 9 lbs. 2 PSI " & 60" 48.8 gal. 9.0 ga. l 60 lbs. 2" " & 60" 4. gal. 4.6 gal. 209 lbs. Diameter " 48" " 2" Diameter Diameter Diamet er " " Length W. P. W. C. LP Weight Length W. P. W. C. LP Weight " & 0" 7" 27.9 gal gal. lbs. 2 PSI " 44" 27.6 gal gal. 49 lbs. Length W. P. W. C. LP Weight 42" Extra Heavy Duty Strap Brackets Available in 4" through 24" diameters. Required for school buses. 8.6 gal gal. 64 lbs. 20 PSI gal gal. 0 lbs. Length W. P. W. C. LP Weight " 80". 2 PSI 8. ga. l 6. gal. 22 lbs. Mounting Bracket 2 PSI. 2.8 gal gal. 0 lbs gal..2 gal. 9 lbs gal ga. l 46 lbs 20 PSI " 48" 8.6 gal gal. 67 lbs " 74.4 gal. 9.6 gal. 200 lbs 28 6" pair 206 8" pair " pair " pair

49 Carburetion - Impco Starting Problems Starting has never been a serious problem when dealing with straight LP-gas engines. However, with dual fuel applications, especially those under 20 CID, there are many factors that can contribute to hard starting. These are:. Vacuum and air leaks. 2. Incorrect carburetor sizing.. Improper idle mixture. 4. Over richening by start valve.. Incorrect location of carburetor, regulator, and/or fuelock. 6. Improper location of electric fuelock lead. 7. Poor engine condition. 8. Incorrect spark plug gap. 9. Cold ambient air temperatures. 0. Incorrect starting technique. Vacuum & Air Leaks In dual fuel applications on small displacement engines, an air leak which would not bother a larger engine becomes critical, especially at cranking speed. Any leak downstream of the air/gas valve will reduce the amount it will rise off its seat during cranking. In extreme conditions, air enters through the leak during the entire intake stroke, while the gas valve is lifted only during part of the stroke. This creates a mixture too lean to burn. A primer may furnish the added fuel around the metering valve to allow the engine to start, and with more numerous intake cycles the leak may be overcome. Vacuum leaks may be detected by applications of small amounts of LP Gas vapor around suspected air leaks downstream of the air valve. It is suggested that an unlit propane cigar lighter be used, since a small flow is all that is necessary. If a leak is located, the engine will speed up, due to the richer mixture. This technique is quite effective around the gasoline carburetor area. Take care to do this out of doors, since adequate ventilation is a must. Air leaks may also be found in the engine, through intake valve seals or past rings which are not seated. The orifice in the PCV valve, which is open during cranking and closed under vacuum, can add a sizable amount of air. Be sure PCV valve does close properly after engine starts. Carburetor Sizing Impco has found that the CA0-20L or -70L on engines of 600cc & under will give better performance and superior mileage as well as better starting than the CA2. The CA2-20 and 260 are adequate for engines 00 to 200 CID, the CA00A for 200 to 20 CID and the CA00A-0 for 20 CID & over. It is important to correctly size the air flow capacity of the mixer to the engine requirement. Use of a mixer that is too large for the engine displacement makes idle adjustment extremely sensitive. When the larger mixers are applied to smaller engines, enrichment for acceleration or power occurs too high in the RPM range to be practical. The small engine cannot lift the large air valve quickly or as high as a larger engine will. Idle Mixture Adjustment Correct idle mixture adjustment is critical to ease of starting. This is compounded if the mixer is oversize for the engine. When the idle mixture (air by pass) adjustment is closed, the air valve will open farther at cranking. Thus the air flow volume remains the same, but gas is increased. If the engine starts hard, check the idle mixture adjustment, following this procedure. Tighten the idle mixture screw in. If the engine starts more easily, slow the engine down while adjusting the idle mixture to prevent stalling from an over-rich mixture. Setting the idle mixture to the best idle (high vacuum) cold will give a reasonably lean but satisfactory mixture after the engine warms. If the idle adjustment must be backed out excessively in order to obtain a smooth idle, this may be compensated for by installing an R-29 spacer ring (for CA2 mixer). Placed between the air valve ring (R-9) and the air valve shoulder, it raises the R-9 by.00~, thereby increasing air flow at idle. This allows the idle screw to be adjusted in to richen the mixture, shutting off most of the bypass air and lifting the air valve farther off the seat during cranking. Setting the idle on a CA00A mixer is touchy on a small engine because of the large gas valve. With the gas inlet elbow removed, screw the idle adjustment in until the rub- ber valve contacts the seat and stops turning. Back the adjustment out 4 turn, re-install elbow. Advance idle speed adjustment screw a turn or so to keep the engine running, then start engine. The idle should be set cold or cool. Adjust the valve in and out gently to determine where the engine speeds up (best vacuum). For final setting, slow idle speed to desired setting. When testing between adjustments, place finger over the opening to the idle mixture screw to prevent air entry. Install idle adjustment plug after desired idle is obtained. Use of the SV start assist valve for priming during cranking is helpful. However, on engines two liters and under, a restriction such as the Impco J-20 ( 6" I.D.) should be used. If these are not available, a spark plug nut, approximately 6" I.D., pushed into the hose, will prevent over priming. Sizing the orifice to the engine can be checked for accuracy by energizing the SV valve separate from the starting circuit. When activated with the engine idling, it may slow the speed or actually kill the engine. However, if by opening the throttle it will start in a turn or two, the orifice size is satisfactory. The SV should always connect to air valve vacuum, not intake manifold. 4

50 Carburetion - Impco Starting Problems Location of Components Mounting the converter and fuelock off the engine is desirable when carbureting 4-cylinder engines. The vibration of the engine moves the converter rapidly back and forth while the secondary diaphragm assembly tends to stay still. This causes the gas pressure to pulse, and can cause excess fuel consumption. The added weight of an LP Gas mixer and adapter on a gasoline carburetor, if not properly braced, can combine with the vibration of a 4-cylinder engine to cause the gasoline carburetor bolts and screws, etc., to loosen, causing air leaks. Keep the atmospheric vent of the regulator out of the direct air stream of the fan. This also can cause fluctuation of the secondary diaphragm and result in gas pressure pulsations. Electric Fuelock Connection Is often a source of starting trouble. Attaching the electric fuelock power lead to an ignition coil terminal. This is a weak source of current. And, it robs the ignition of needed amperage. Engine Condition As previously mentioned, the engine itself can be a source of air leaks. Leaking intake seals, poorly seated rings, and leakage through the PCV valve hose are problem areas to be checked. Beyond these problems, however, the engine must be in good working order. Check the engine for any leaks downstream of the air valve. Compression pressure of 0 psi or better at cranking is desirable to prevent hard starting. Incorrect Spark Plug Gap Spark plugs should be in good condition and gapped to.0" to.02". A protruded nose plug is helpful if it will clear the piston at the top of its stroke. Ambient Temperature At very cold ambient temperatures (-0 F., -4 C. or below), there may be insufficient vapor pressure in the fuel tank to supply fuel to the converter/regulator, resulting in no start or hard starting. Another condition which may prevent starting in cold weather involves over priming. If this condition is suspected, attempt to start the engine with the primer disconnected. The primer can be disconnected by removing the electrical connector or by pinching the fuel hose. 42

51 Carburetion - Impco Starting Problems Troubleshooting Hard Starting Check idle mixture for proper setting. Richen idle mixture as an aid to starting. 00A mixer idle screw out (counter clockwise) l 4 turn. CA42 out one to two turns CA 2, CA 22 idle screw in (clockwise) two turns. Idle mixture properly set. Possible cause: Oversize carburetion sizing. Idle mixture out of adjustment. Refer to "Idle mixture adjustment" section for proper setting technique. Verify that airflow capacity of mixer is correctly sized to engine requirement (See IMPCO publication SL-7 How to select the right carburetor"). Mixer is of proper capacity. Possible Cause: Loose vapor hose fittings or leaking vapor hose. Mixer is of improper capacity. Replace mixer with one of proper airflow capacity. Check vapor hose and fittings with soap and water solution to detect leaks. Hose and fittings not leaking. Possible cause: Weak current to electric (gasoline or LP-Gas) fuel lockoff. Hose and fittings leaking. Replace leaking vapor hose. Tighten or replace loose fittings. Check that power lead is not connected to an ignition coil terminal. Power lead is connected to strong source. Hard starting is apparently not a fuel related problem. Recheck the system and investigate the possibility of an ignition problem. Power lead is connected to ignition coil terminal. Reconnect lead to strong source of 2 VOLT current. Possible cause: Incorrect spark plug gap. Remove spark plugs and measure for correct gap. Spark plug gap is correct. Verify that rest of ignition system is in good working order. If no problems are found, investigate the possibility of engine mechanical problems. Spark plug gap is incorrect. Clean and gap spark plugs.00" to.02". Possible cause: poor engine condition. Check engine for compression of 0 PSI or better at cranking. Inspect for air leaks downstream of the air valve. Engine condition poor. Repair and seal air leaks. Engines with less than 0 PSI compression may require valve grind, valve seals, and/or rebuilding to obtain optimum starting. 4

52 Carburetion - Impco Starting Problems Troubleshooting Hard Starting Possible cause: No fuel supply to convertor. Insert matchstick into VFF0 atmospheric vent (front cover). Diaphragn within should resist pressure. Indicating fuel supply to regulator. Fuel supply O.K. Possible Cause: Cold ambient air temperatures No fuel supply. Check fuel tank valve. Check hose, fittings and VFF0 filter for restrictions. Verify that there is no over priming. Disconnect SV valve if over priming exists. Engine does not start. Possible cause: Improper starting technique. Engine starts. Insert orifice in 4" SV valve hose. Refer to "Start valve enrichment" section. Verify the condition. Perform visual inspection of fuel system components and attempt to start engine. Use open throttle. Engine does not start. Possible cause: Lack of priming or over priming (If over priming is suspected refer to "Cold ambient air temperature"). Engine starts. Review proper starting technique with driver. Explain reasons for open throttle conditions. Test for battery voltage and continuity to ground in the electrical primer circuit during cranking. Circuit complete. Circuit incomplete. Repair circuit as necessary. Jump battery to primer contact. Primer clicks, engine does not start. Possible cause: Vacuum and/or air leaks. Primer does not click. Replace primer. Check for loose carburetor mounting bolts or a leaking mounting gasket. Tight mounting. Loose/leaking mounting. Tighten mounting bolts or replace gaskets. Check for cracks in the gasoline carburetor housing (if dual fuel) or intake manifold. Carburetor O.K. Possible cause: Improper idle mixture. Cracks noted. Replace the carburetor or intake manifold. 44

53 Carburetion - Lean Idle Condition & Vehicle Electrical System Impco Lean Idle Condition Model 42 Series The pictures of the idle diaphragm assemblies show a correct and an incorrect assembly configuration. The assembly with the straight lever allows normal movement of the Viton valve off the valve seat, providing a full opening of the idle gas jet when adjusted rich. The bowed lever reduces available lift off the seat by limiting the travel. The bowed assembly can be straightened easily by bending to conform to a straight edge ruler or equivalent. In reassembling the idle diaphragm cover to the body, the idle mixture adjustment screw must be backed out until it is engaged by only three or four threads in the cover. This will allow assembly of the cover to the body and idle diaphragm assembly without bending the tip of the lever. After the diaphragm and cover are reassembled, the idle mixture adjustment screw may be turned in until the retainer spring is compressed about one third. With the engine running at idle, adjust the screw in or out for best idle vacuum. If the idle mixture is set with a cold motor to the smoothest possible idle, the mixture when the engine is hot will lean out to a practically ideal mixture for minimum CO readings, without being too lean, thereby causing misfire. Correct Assembly Configuration Incorrect Assembly Configuration Mak-Saf Vehicle Electrical System The Mak-Saf is a UL listed device that allows the isolation of a vehicle s battery, or alternator from the rest of the electrical system by pulling a cable-connected handle. The handle can be mounted in the instrument panel or hidden. Features Safety Switch Ensures a no-start condition particularly for equipment used in dangerous atmospheres such as LP transport vehicles. Prevent Battery Drain For vehicles like RVs & construction equipment that are left inoperative for long periods of time. Anti-Theft Hide the handle in a clever but convenient place. Application Fork lifts, tank transports, off-road construction equipment, cars. 28 Safety Disconnect Switch 4