Blower Drive B-1 Section Contents. Page. Drive Belts B-2. Belt Length Chart B-3. Sprockets B-4. Sprockets B-5. Sprocket Sectional Views B-6

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1 Blower Drive B-1 Section Contents Drive Belts Belt Length Chart Sprockets Sprockets Sprocket Sectional Views 14mm Overdrive Chart 8mm Overdrive Chart 8mm Overdrive Chart 11mm Overdrive Chart Idler Pulleys Idler Plates Idler Plates Blower Snouts Blower Snout Sectional Views Blower Drive Hubs/Sectional Views Page B-2 B-3 B-4 B-5 B-6 B-7 B-8 B-9 B-10 B-11 B-12 B-13 B-14 B-15 B-16

B-2 Drive Belts RCD stocks the largest selection of Gates Power Grip GT2, Poly Chain GT2 Standard HTD and HTD YU II positive drive belts in the racing industry.

2 B-2 Drive Belts RCD stocks the largest selection of Gates Power Grip GT2, Poly Chain GT2 Standard HTD and HTD YU II positive drive belts in the racing industry. These belts (in pitch sizes shown below) are available in a variety of widths and lengths. Standard HTD has been the leader in the new generation of high performance curvilinear synchronous belts. First developed in the early 70 s, it has been continuously improved through the years. Its neoprene and fiberglass construction have proven extremely durable for virtually all racing applications (with the exception of alcohol and fuel classes). This belt can be back-bent. Power Grip GT2 is an improvement over the HTD belt. It is a rubber belt with a fiberglass tensile member, neoprene backing and teeth, and a tough nylon facing for low friction and wear resistance. This belt has excellent flex life, high resistance to elongation and good length stability. This belt can be back-bent. 14mm GT2 PolyChain 14mm HTD PolyChain 13.9mm HTD PolyChain 11mm GT2 PolyChain 8mm GT2 PolyChain 8mm HTD Standard 5mm HTD Standard Poly Chain GT2 A second generation Poly Chain product has a patented tooth profile which substantially improves stress distribution. In addition, it incorporated the latest urethane and aramid materials technology for the tensile member, coupled with a completely new manufacturing method. These materials have very high modulus and tensile strength. This unique product has horsepower ratings up to four times that of its rubber counterpart! Its high impact strength withstands extreme shock and surge loading. The result is a product superior to anything in its class - without exception! This belt has been widely accepted in the fuel classes as giving superior performance compared to any other belt. This belt should NOT be back-bent. Poly Chain GT2 (PS Series) The newest generation Poly Chain belt developed exclusively for Top Fuel cars, but may be run in any class for those demanding superior performance. This new generation Poly Chain uses a modified core construction and materials used in the proven Poly Chain predecessor. Tests on championship race teams have shown an increase in reliability and the ability for more runs per belt, reducing overall belt replacement costs. The result is a product superior to anything in its class - without exception! This belt should NOT be back bent. 1/2 inch GT2 PowerGrip

3 Belt Length Chart B-3 BLOWER TO CRANKSHAFT DISTANCE BELT NUMBER AND PITCH T T T T T T T T T T T T T 14mm 8mm 13.9mm 14mm 11mm 8mm 14mm 14mm 11mm 14mm 14mm 8mm 14mm BELT LENGHTH INCHES

B-4 Sprockets ost requirements and is able to produce special sizes hined from solid billet 6061-T6 aluminum bars or solid ultra-sound tested for imperfections prior to machining. available.

5 drive flange thickness. ote the tooth count. (Example: 000000-54 = 54 tooth) ble in aluminum R 0.75 style only.

This greatly reduces the ten to distort out of round under high belt loading and also k bending. This is most critical on the large diameter spr blowers. GT 3.5" WIDE CENTER FLANG GT 4.

5" WIDE CENTER FLANG 8mm 8mm 11mm 11mm 150817-67 150857-67 151117-49 151157-49 150817-80 150857-80 151117-58 151157-58 3.

151413-26 151453-26 151413-34 151453-34 14mm 14mm 151415-26 151455-26 151415-34 151455-34 Special Orders: RCD is able to produce any size sprocket u 14 diameter in magnesium and up to 4.

50 from 8mm chrome-moly heat trea Drive hubs bored, keyed 50T & GT honed for an accurate Drive hubs have 1.

4 B-4 Sprockets ost requirements and is able to produce special sizes hined from solid billet 6061-T6 aluminum bars or solid ultra-sound tested for imperfections prior to machining. available. RCD s aluminum sprockets are hard anodize sprockets are coated to resist corrosion. ET Sprockets ts. All blower drive sprockets come with standard 2.00 iameter circle, and 0.5 drive flange thickness. ote the tooth count. (Example: = 54 tooth) ble in aluminum R 0.75 style only. 14mm 14mm RCD offers the 8mm, 11mm and 14mm GT profile cranksh flange centered in the sprocket. This greatly reduces the ten to distort out of round under high belt loading and also k bending. This is most critical on the large diameter spr blowers. GT 3.5" WIDE CENTER FLANG GT 4.3" WIDE CENTER FLANG 8mm 8mm 11mm 11mm 13.9mm HTD 3.5" WIDE CENTER FLANG 8mm 8mm 11mm 11mm mm 54T GT ET ET ET ET 14mm 14mm mm 14mm mm 14mm mm 14mm mm 14mm Special Orders: RCD is able to produce any size sprocket u 14 diameter in magnesium and up to 4.5 wide. Prices request mm 59T GT RCD blower drive hubs, with easily changeable sprockets supercharged engine for maximum horsepower and your Drive hubs machined 3.50 from 8mm chrome-moly heat trea Drive hubs bored, keyed 50T & GT honed for an accurate Drive hubs have 1.25 register and six 1/4-28 bol Sprockets machined from billet 6061T-T6 alumin Sprockets available in 8mm GT or HTD profiles f Call for availability and stocked sizes mm 27T GT m 14mm ET m 14mm DARD Drive Hubs PN: Adapter Hub Vortech PN: Adapter Hub Paxton PN: Adapter 4.30 Hub 14mm ATI ProCharger 30T GT Sprockets HTD CENTRIFICAL GT CENTRIFICAL 8mm 8mm Aluminum Aluminum /2 trapezoidal 33 tooth Aluminum

Center Flange Sprockets Sprockets B-5 aft sprockets with the

ockets used to drive screw E 14mm 14mm 6 151407-30 151447-36

Drive, allows you to tune your driving conditions. ted steel.

5 Center Flange Sprockets Sprockets B-5 aft sprockets with the drive dency of the circumference eeps the drive flange from ockets used to drive screw E 14mm 14mm E mm 75 tooth GT profile Aluminum E 14mm 14mm mm mm 42 tooth GT profile Magnesium p to 24 diameter in aluminum, and delivery are quoted upon Centrifugal Blower Drive, allows you to tune your driving conditions. ted steel. fit on the blower input shaft. ts for solid sprocket mounting. um and hard anodized for wear. rom 26 teeth to 55 teeth.

6 B-6 Sprocket Sectional Views Aluminum Top & Bottom Sprockets Top Sprockets Top Sprockets Top Sprockets Top Sprockets 2.68 Top Sprockets Magnesium Bottom Sprockets Bottom Sprockets places even Bottom Sprockets

7 14mm Overdrive Chart B-7 Percentage of Crankshaft Speed Blower Sprocket Tooth Count NOTE: Also used for 1/2 pitch Crankshaft Sprocket Tooth Count

8 Crankshaft Sprocket Tooth Count B-8 8mm Overdrive Chart Percentage of Crankshaft Speed Blower Sprocket Tooth Count

9 Crankshaft Sprocket Tooth Count 8mm Overdrive Chart B-9 Percentage of Crankshaft Speed Blower Sprocket Tooth Count

10 Crankshaft Sprocket Tooth Count B-10 11mm Overdrive Chart Percentage of Crankshaft Speed Blower Sprocket Tooth Count

Idler Pulleys B-11 Drawing 1 Drawing 2 Drawing 3 PULLEY DIM "A" SPINDLE DIM "B" DIM "C" PULLEY DIM "A" SPINDLE DIM "B" DIM "C" DRAWING 1 DRAWING 3 156014-0022 2.175" 156019-0002 0.15" 1.

65" 156019-0002 0.15" 1.250" *156024-0018 156019-0062 0.43" 0.655" 156019-0004 0.53" 1.625" 156024-0024 156019-0006 0.90" 2.000" *156024-0025 156014-0031 3.05" 156019-0002 0.15" 1.250" 156024-0030 156019-0004 0.

11 Idler Pulleys B-11 Drawing 1 Drawing 2 Drawing 3 PULLEY DIM "A" SPINDLE DIM "B" DIM "C" PULLEY DIM "A" SPINDLE DIM "B" DIM "C" DRAWING 1 DRAWING " " 1.250" " " 0.470" " 1.625" " 0.655" " 2.000" " " 0.470" " " 1.250" * " 0.655" " 1.625" " 2.000" * " " 1.250" " 1.625" * " 2.000" " " 0.470" " " 1.250" * " 0.655" " 1.625" DRAWING 2 * " 1.050" *MAGNESIUM " 1.450" " 1.850" " 1.050" * " 1.450" " 1.850" " " 1.050" * " 1.450" " 1.850"

B-12 Idler Plates Big Block Chevy Idler Plate Fits all Big Block Chevy, KB, KB Olds, Rodeck and 481X. It is machined from 3/4 thick aluminum or magnesium plate.

Option: Ported 1 water block-off plates are available.

The outboard support is 1/2 thick. Accepts either smooth or toothed idler pulleys. Includes 1/4 water block-off plates. All parts machined from 2024-T3 aluminum bar and plate. PN: 156200-0010 w/3.

Machined from 3/4 thick aluminum plate for rigidity in full competition applications. The kit includes: studs, spacers, nuts, washers and 1/4 thick water block-off plates.

12 B-12 Idler Plates Big Block Chevy Idler Plate Fits all Big Block Chevy, KB, KB Olds, Rodeck and 481X. It is machined from 3/4 thick aluminum or magnesium plate. It has a 7 long slot which provides for adequate adjustment. The assembly includes: studs, spacers, nuts, washers and 1/4 thick water block-off plates. Option: Ported 1 water block-off plates are available. PN: Big Block Chevy Idler plate with Outboard Support This idler bracket assembly provides the most stable mounting platform for the idler pulley. The back plate is 3/4 thick. The outboard support is 1/2 thick. Accepts either smooth or toothed idler pulleys. Includes 1/4 water block-off plates. All parts machined from 2024-T3 aluminum bar and plate. PN: w/3.2 Idler Spacing PN: w/4.4 Idler Spacing Small Block Chevy Idler Plate For all small block Chevys and derivatives such as Rodeck or Donovan. Machined from 3/4 thick aluminum plate for rigidity in full competition applications. The kit includes: studs, spacers, nuts, washers and 1/4 thick water block-off plates. PN: NOTE: Additional Chevy water block options on page E-8 Ford Idler Plate with Outboard Support This idler bracket assembly provides the most stable mounting platform for the idler pulley. The back plate is 3/4 thick. The outboard support is 1/2 thick. Accepts either smooth or toothed idler pulleys. All parts machined from 2024-T3 aluminum bar and plate. Note: This bracket does not block off the water holes. PN: w/3.2 Idler Spacing PN: w/4.4 Idler Spacing

Idler Plates B-13 426 Chrysler angled idler bracket Complete with top brace and dual magneto support. This idler bracket allows the maximum amount of idler pulley adjustment.

Top brace provides additional outboard support for the idler pulley keeping it parallel with the blower drive sprockets. The additional friction surface also helps prevent slipping.

The 3/4 diameter idler stud nut, and side stools for toothed idler, are available in titanium. Includes all bolts, nuts, studs and spacers.

idler plate for the 440 or the 426 Chryslers with only one magneto. It can be used with a dual magneto drive but the idler pulley travel is limited by interference with the magneto drive.

13 Idler Plates B Chrysler angled idler bracket Complete with top brace and dual magneto support. This idler bracket allows the maximum amount of idler pulley adjustment. The adjusting slot starts at the top in the center and moves out and down at a 45 angle to clear under a dual magneto drive. Top brace provides additional outboard support for the idler pulley keeping it parallel with the blower drive sprockets. The additional friction surface also helps prevent slipping. Dual magneto supports are for I.C.E., Enderle, and S.A.E. standard or tall cam location. Brackets and idlers are available in either aluminum or magnesium. The 3/4 diameter idler stud nut, and side stools for toothed idler, are available in titanium. Includes all bolts, nuts, studs and spacers. PN: Multiple configurations are available - Please call to configure your application and for pricing NOTE: Additional photos and options on pages E-2 and E Idler Plate This is the most popular idler plate for the 440 or the 426 Chryslers with only one magneto. It can be used with a dual magneto drive but the idler pulley travel is limited by interference with the magneto drive. This 3/4 thick idler plate provides a stable platform for the idler pulley. Assembly includes studs, spacers, nuts and washers. PN: Short Slot PN: Long Slot 392 Chrysler or 417 Donovan This 3/4 thick idler plate provides a stable mounting platform for the idler pulley. Spools, studs, nuts and washers for mounting idler plate available. All parts machined from 2024-T3 aluminum bar and plate. Magnesium plate machined from AZ31B-H24 plate. Studs are heat treated chrome-moly steel. Nuts are aircraft quality. PN: Idler Plate w/long Slot PN: Idler Plate w/short Slot Magnesium

B-14 Blower Snouts RCD s blower snouts are available in aluminum magnesium coated to resist corrosion. All snout assemblies are complete with shaft, bearings, seal, lock rings, fasteners and O ring.

Snout housings are machined from solid billet magnesium or aluminum. Drive shafts are gun drilled and interior dimension profiled for maximum weight reduction.

Sprocket fasteners are Grade 8 socket head bolts or 12 point bolts, with correct grip length for top sprocket and starter jaw.

125 P/N: 157000-0008 Blower Snout 3.875 P/N: 157000-00012 Blower Snout 5.125 P/N: 157000-00016 Blower Snout 5.125 Double Bearing P/N: 157000-00017 Blower Snout 5.

14 B-14 Blower Snouts RCD s blower snouts are available in aluminum magnesium coated to resist corrosion. All snout assemblies are complete with shaft, bearings, seal, lock rings, fasteners and O ring. Features: Face O ring seal between housing and blower front cover. Magnesium housings have flanged aluminum bushings around bolt holes. Snout housings are machined from solid billet magnesium or aluminum. Drive shafts are gun drilled and interior dimension profiled for maximum weight reduction. Standard blower drive shaft is machined from heat treated chrome-moly steel with major diameter 24 tooth involute spline for best strength and precision slip fit. Sprocket fasteners are Grade 8 socket head bolts or 12 point bolts, with correct grip length for top sprocket and starter jaw. Select snouts have 12 mount holes and 2 bearings in the snout to help carry the bending load the blower drive belt puts on the front of the blower and the rotors. P/N: Blower Snout P/N: Blower Snout P/N: Blower Snout P/N: Blower Snout Double Bearing P/N: Blower Snout Double Bearing w/teflon Seals P/N: Blower Snout Double Bearing Magnesium P/N: Blower Snout Double Bearing w/viton Seals P/N: Blower Snout Double Bearing w/teflon Seals P/N: Blower Snout Double Bearing P/N: Blower Snout Double Bearing Magnesium NOTE: Specify Standard Blower or Retro Hi-Helix when ordering snout. Option: 300M blower drive shaft is machined from heat treated E4340 modified steel with an incredible 280,000 psi tensile strength. Blower Snout Spacer with Center Support Bearing This spacer allows the blower to be moved back 1.50 while retaining the blower sprocket in the same location. The spacer is machined from billet aluminum and is complete with bearing, correct length bolts and two O ring seals. A longer drive hub is required. PN: NOTE: 1.5 longer coupler must be used. NOTE: If a blower mount starter is used, the stands must be extended.

15 Blower Snout Sections B-15

B-16 Blower Hubs Sectional View SSI Blower Drive Hubs Machined from heat treated chrome-moly steel billet.

the correct chamfer and spot face for our NAS 12 point bolts. The finish is black oxide.

10 Long PN: 157002-25 1.5 Bore 5.60 Long Roots Roots Roots Roots PN: 157002-09 1.60 Long PN: 157002-10 2.

16 B-16 Blower Hubs Sectional View SSI Blower Drive Hubs Machined from heat treated chrome-moly steel billet. RCD blower drive hubs have six 7/16 weight reduction holes and six 5/16 or 3/8 attachment holes that have the correct chamfer and spot face for our NAS 12 point bolts. The finish is black oxide. SSI SSI PN: Bore Long PN: Bore 5.10 Long PN: Bore 5.60 Long Roots Roots Roots Roots PN: Long PN: Long PN: Long PN: Long SSI (No Bolt) SSI (No Bolt) PN: Long PN: Long PN: Long SSI (No Bolt)

LONG LENGTH DESIGN MANUAL CONTENTS PAGE. Introduction Long Length features & benefits... 2 Long Length belting programme... 7

LONG LENGTH DESIGN MANUAL CONTENTS PAGE. Introduction Long Length features & benefits... 2 Long Length belting programme... 7 DESIGN MANUAL LONG CONTENTS PAGE LENGTH Introduction Long Length features & benefits... 2 Long Length belting programme... 7 Drive Design Belt drive selection procedure... 8 Belt pitch selection guides...