Dynojet Research, Inc. All Rights Reserved. Installation Guide For the Kart and ATV Dynamometers.

Transcription

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2 Dynojet Research, Inc. All Rights Reserved. Installation Guide For the Kart and ATV Dynamometers. This manual is copyrighted by Dynojet Research, Inc., hereafter referred to as Dynojet, and all rights are reserved. This manual, as well as the software described in it, is furnished under license and may only be used or copied in accordance with the terms of such license. This manual is furnished for informational use only, is subject to change without notice, and should not be construed as a commitment by Dynojet. Dynojet assumes no responsibility or liability for any error or inaccuracies that may appear in this manual. Except as permitted by such license, no part of this manual may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, electronic, mechanical, recording, or otherwise, without the prior written permission of Dynojet. The Dynojet logo is a trademark of Dynojet Research, Inc. Any trademarks, trade names, service marks, or service names owned or registered by any other company and used in this guide are the property of their respective companies. Dynojet Research, Inc., 2191 Mendenhall Drive, North Las Vegas, Nevada 89081, USA. Printed in USA. Part Number: Version 06 (12/2005)

3 Contents Chapter Installation and Setup Introduction Your Dyno Room Battery Computer Required Uncrate the Dyno Removing the Dyno from the Crate Installing the Battery Connect the Dyno to the DynoWare EX Connecting the Shop Air Final Assembly Chapter Hardware Installation DynoWare EX Atmospheric Sensing Module RPM Module Dynamometer Input/Output Module CPU Module Connecting the DynoWare EX Chapter Optional Accessories Installation Optional Accessories Above Ground Kit Contents Above Ground Kit Installation Motorcycle Carriage Contents Motorcycle Carriage Installation Document # i

4 Contents Chapter Basic Dyno Operation Loading the Vehicle Connecting the RPM Pickup RPM Pickup Descriptions Connecting the Secondary Inductive Pickup Connecting the Primary Inductive Pickup Pre-run Inspection Before Starting the Engine Engine Warm Up After Engine Warm Up Making a Test Run ii Document #

5 Chapter 1 Kart/ATV Installation and Setup Introduction Thank you for purchasing the Dynojet Kart/ATV Dynamometer. This document will give the information needed to install the Dynojet Dynamometer. Before your dyno arrives there are a few factors to consider. The beginning of this chapter discusses what you will need to provide for your dyno. Your Dyno Room 12 volt battery Computer System The rest of this chapter deals with uncrating, installation and setup of the dynamometer. If you have any questions please call Dynojet at (800) Document #

6 Your Dyno Room This section is not meant to imply that a dyno room is essential to repeatable results on a Dynojet dynamometer, though a dyno room with an engine cooling intake fan, exhaust extraction and noise reduction capabilities can add a new dimension to your shop. A proper dyno room design can help to ensure repeatable accurate runs. A good dyno room should: Minimize noise. Provide a controlled environment for testing. Provide a view window for customers. Be designed with safety in mind. Intake Fan After building your dyno room, you will need to supply a cooling fan. The cooling fan serves two functions. First it must supply air to cool the bike s engine. Second it must supply fresh oxygen for you and your vehicle to breathe. Many people have the misconception that you cannot tune without a large fan that simulates exact road conditions. A good cooling fan is the only requirement for consistent fault diagnostics and tuning. Exhaust Extraction An exhaust fan is needed to remove exhaust gases, especially Carbon Monoxide, in the dyno room. Carbon Monoxide causes two problems. It is extremely harmful to people if not removed from the room and affects engine power when mixed with fresh air. 1-2 Document #

7 Pressurized Dyno Room If the air coming into the dyno room is greater than the air leaving the dyno room, the room will become pressurized. A pressurized dyno room would make measured power misleading. To compensate for this you need an equalizer box. This box is basically a vent to the outside of your dyno room baffled to reduce noise. The size of the equalizer box is dependent on the size of your dyno room and the size of your fans. Industrial Noise Control, Inc. Industrial Noise Control, Inc. offers a zinc-coated steel room custom built for your specifications. This room will meet all of the dyno room requirements. For more information on building a dyno room, read the DynoSource newsletter Volume 1, No. 7 (published by Dynojet) included in your Information Pack. Document #

8 Battery A vehicle starting system is included with your Dynojet Dynamometer. You will need an automotive battery if you want to use this feature. The dyno is designed to carry a group 24 deep cycle series battery with a minimum of 600 cold cranking amps. Computer Requirements You will need to provide a computer system to run the WinPEP software. WinPEP 7 includes complete documentation in online Help. From the WinPEP 7 menu bar, choose Help WinPEP 7 Help or visit (accessible with a valid user name and password). minimum system requirements recommended systems requirements Microsoft Windows 2000/XP Microsoft Windows 2000/XP Pentium 800 MHz Processor 2.4 GHz Processor or greater 256 MB of available RAM 256 MB of available RAM or greater one COM port, two COM ports for Tuning Link one COM port, two COM ports for Tuning Link 800x600, 256 color monitor (SVGA) 1280x color monitor (SVGA) or better 1.2 gigabyte hard drive 1.2 gigabyte hard drive 30 MB of available hard-disk space 100 MB of available hard-disk space CD ROM and floppy disk drive CD ROM and floppy disk drive printer, if hard copies are needed printer (preferably HP DeskJet ) 1-4 Document #

9 Uncrate the Dyno Use the following steps to uncrate your dyno. Step 1 Move the crated dyno to a clear area near your dyno room. Step 2 Remove the top of the crate with a suitable pry bar. Note: If you ordered the above ground kit it will be in the top portion of the crate. Remove the kit and top portion of the crate. Refer to chapter 3 (Optional Accessories Installation) for a list of the Above Ground Kits contents and installation instructions. Document #

10 Step 3 Remove the boxes from the crate and verify that they contain the following: G H H C A F E D B DynoWare EX+ system (A) The DynoWare EX+ system is comprised of four modules: the CPU module, the Dynamometer Input/Output module, the RPM module and the Atmospheric module. Mounting Hardware (B) This plastic bag contains the rubber stands for the bottom of the DynoWare EX+. Power Supply and Cable (C) The power supply and cable provides power to the DynoWare EX+. It is 7 1 / 2 feet long. Hand Held Pendant (D) The hand held pendant is used to turn the dyno brake on/off and start/stop dyno runs. The hand held pendant has a 20-foot cable that plugs into the DynoWare EX+ and must reach the driver of the vehicle. 1-6 Document #

11 Data Acquisition Cable (E) The data acquisition cable is 20 feet long. This cable connects the Breakout board on the dyno to the DynoWare EX+. Serial Port Cable (F) The serial port cable connects your computer to the DynoWare EX+. This cable is 12 feet long. DynoWare EX+ placement can be important if you run both front and rear wheel drive vehicles. The vehicle operator must be able to see the computer monitor during a run. Primary Wire RPM Pickup (G) The primary wire RPM (inductive) pickup is used to measure the vehicle s engine RPM. The primary wire inductive pickup has a 20-foot cable. One end of the cable plugs into the DynoWare EX+ and the other is placed on a wire connected to the primary side of the coil. (Optional) Secondary Wire RPM Pickup (H1 & 2) The secondary wire RPM (inductive) pickups are used to measure the vehicle s engine RPM. The secondary wire inductive pickups have a 20-foot cable. One end of the cable(s) plug into the DynoWare EX+, the other attaches to a spark plug wire on the vehicle. Vehicles with direct, wasted spark ignition may require two secondary inductive pickups. Document #

12 Removing the Dyno from the Crate You will have to provide equipment capable of lifting a minimum of 1600 lbs. (725 kg.) to lift the dyno off the crate and position in your dyno room. You will also need a pair of straps capable of supporting 1600 lbs. (725 kg.) to attach to the dyno (Dynojet recommends the single loop style straps). Use the following steps to remove the dyno from the crate. Step 1 Lift the top plate out of the crate and set it aside. Step 2 Loop two straps around the dyno axle as shown in the picture on the next page: Lift the dyno off the crate and position it in the dyno room. Warning: Loop the straps as close to the drums as possible. Take extra care when lifting the dyno that the straps don t come in contact with the sensitive electronics attached to the dyno. 1-8 Document #

13 Back panel removed for illustration purposes Install the Battery Install the battery in the battery carriage as shown below: + - Install the red battery cable to the positive post, and the black cable on the negative post Connect the Dyno to the DynoWare EX+ 25 Pin Data Acquisition Cable from the Dynoware Hardware Stack Connect the 25 pin data acquisition cable into the breakout board and hand tighten the screws, as shown below: Document #

14 Connect the Shop Air Remove the brake cover if necessary, and then run a 3/8 air hose through the hole in the side of the frame. Push the hose onto the nipple at the regulator, and then secure the air line to the brake line Document #

15 Final Assembly Step 1 Secure the dyno to a concrete floor with the supplied Red Head Anchor Kit. The feet come bolted on the dyno frame. Mark the (4) holes and then remove the feet. (4) Feet that come attached to the dyno. Using a carbide bit designed for concrete (see instructions included with anchors), drill four 1/2 holes in the floor where you made your marks. The holes should ideally be as deep as the length of the anchors (approx. 1 5/8 ). Note: Be sure to clean the debris out of the holes that you drilled. Step 2 Place the slotted end of the anchors in the holes that you drilled. They will most likely be very snug, so use a brass drift punch and hammer to drive them down. Document #

16 Step 3 Use the Set Tool to expand the base of the anchors. Place the small end of the Set Tool into the threaded end of the anchor (threaded end should be up). Drive the Set Tool with a large hammer until the anchor is fully seated. Set Tool Step 4 Replace the (4) feet on the dyno and secure them to the floor with supplied 3/8 hardware. Note: Level the Dynamometer frame by adjusting the bolts that run through the feet and into the frame. Height Adjuster Bolt 1-12 Document #

17 Step 5 Once you have secured the dyno into its final position, remove the (6) 3/8 hex bolts from the top deck. Warning: Never move the dyno without these bolts installed and torqued to 40 ft-lbs. Step 6 Lay the top plate on the top deck of the dyno and secure it with (6) 3/8 truss head bolts. (Above ground applications use (8) 3/8 truss head bolts.) Document #

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19 Chapter 2 Hardware Installation DynoWare EX+ System Expansion Connector The standard dynamometer electronics package is comprised of 4 interconnected modules: Atmospheric Sensing Module RPM Module Dynamometer Input/Output Module CPU Module Atmospheric Sensing Module: The atmospheric sensing module measures absolute pressure, air temperature and relative humidity. These measurements are used by WinPEP to correct power and torque measurements to standard atmospheric conditions according to a DIN, SAE or other formula. The green LED glows when the atmospheric sensing module is receiving power. The flashing amber LED indicates the module processor is operating properly. Document #

20 RPM Module: The RPM module receives and processes signals from up to 2 inductive pickups for measurement of engine RPM. Each input has an automatic gain circuit to compensate for a wide variance of ignition systems. The green LED glows when the RPM module is receiving power. The amber LED flashes when an RPM signal is detected. A steady flash rate, proportional to engine RPM, indicates a good RPM signal. These connectors are the inputs for both primary and secondary inductive pickup clips. Either input may be used with a primary inductive pickup or a secondary inductive pickup on a single ended coil. Both inputs can be used for a wasted spark ignition. 2-2 Document #

21 Dynamometer Input/Output Module: The dynamometer I/O module sends and receives data from the dynamometer and the hand held pendant. The module also contains a buzzer and light which are activated when either the vehicle or dynamometer speed limit is approached. The green LED glows when the dynamometer input/output module is receiving power. The amber LED flashes proportionally to dynamometer drum RPM. This 25-pin receptacle connects to the shielded cable from the dynamometer. This 9-pin receptacle connects to the hand held pendant which houses the button used to Start/Stop acquiring data. The pendant may also contain a brake switch. Document #

22 CPU Module: The CPU module contains a 32-bit processor which acquires data from the expansion modules and communicates to the main computer running the WinPEP software. The processor queries the expansion modules to determine their identity and capabilities. The green LED glows when the CPU module is receiving power. The blue LED is lighted when data from the modules is being acquired and saved. One of these connectors is used to communicate to the main computer. The 9-pin receptacle (left) connects to the PC s RS-232 serial communications port. The 8-pin modular connector (right) provides communications according to the RS-422/485 specification. 2-4 Document #

23 CPU Module:... Continued This connector provides a synchronization signal to a 3rd-party data acquisition system. This connector provides 12 Volt DC power to a 3rd-party data acquisition system. This connector accepts 12 Volt DC power from a power supply or battery. The adjacent LED glows bright green when power is properly connected. When this switch is on, power is supplied to all connected modules. Connecting the DynoWare EX+ Use the cables that came in the DynoWare package to make the following connections: 9-pin shielded serial cable between the RS-232 connector of the CPU Module and a free COM (serial communications) port on the PC. A 9- pin to 25-pin adapter may be required at the PC. 25-pin shielded cable from the dynamometer to the Dynamometer Input/Output Module. 9-pin connector from the hand held pendant to the Dynamometer Input/Output Module. 3-pin plug from the power supply to the CPU Module with its flat side facing down. (Refer to the picture on the next page) Note: The DynoWare EX+ stack must be mounted in your shop so as to be easily seen while making dyno runs. Document #

24 Primary Inductive Pickup Cable (not shown) Remote Switch Breakout Board to DynoWare Cable Cord from Power Supply Computer Serial Port Cable 2-6 Document #

25 Chapter 3 Optional Accessories Installation Several optional accessories are available for the Dynojet Kart/ATV Dynamometer. This Chapter describes them and give the operator the necessary instructions to install them. Call Dynojet for more information on these optional accessories. Optional Accessories Motorcycle Carriage Gives the operator the ability to easily dyno motorcycles. Available with normal or optional electrically powered carriage adjustment. Above Ground Kit Where a pit is not practical or a measure of portability is needed. Shown with both the Above Ground Kit and Motorcycle Carriage. Document #

26 Above Ground Kit Contents Front Decks: 2 Deck Assemblies 2 U-Legs 2 Lower Supports Hardware Pack (A) for U-Legs 8-3 / 8 " x 2 1 / 2 " Hex bolts 8-5 / 16 " Flat washers 8-3 / 8 " Lock washers 8-3 / 8 " Nuts Hardware Pack (B) Lower Support to Frame 4-3 / 8 " x 3 / 4 " Hex bolts w/ lock tight 4-5 / 16 " Flat washers Hardware Pack (C) Front Decks to the dyno 4-3 / 8 " Truss head bolts Front Decks A B C Lower Supports U-Legs 3-2 Document #

27 Rear Deck: 1 - Rear Deck Assembly 3 - Rear Deck Support Arms Hardware Pack (A) Supports to deck 6-3 / 8 " x 2 1 / 2 "" Hex bolts 6-5 / 16 " Flat washers 6-3 /8" Lock washers 6-3 / 8 " Nuts Hardware Pack (B) Supports to the dyno 2-3 / 8 " x 3 / 4 " Hex bolts w/ lock tight 2-5 / 16 " Flat washers Hardware Pack (C)Rear Deck to the dyno 4-3 / 8 " Truss head bolts Rear Deck Assembly A B Rear Deck Support Arms C Note: All three supports are interchangeable (Identical) Document #

28 Above Ground Installation Step 1 Remove (4) bolts from the rear frame panel. Remove these bolts Step 2 Using the Rear Deck Hardware Pack B, install the Rear Supports on the dyno. (Use the bolts that you removed earlier to secure the two outside supports) Rear Supports mounted 3-4 Document #

29 Step 3 Loosen the (6) screws that hold the top plate on the dyno. This will allow you to lineup the holes. and ease installation. Step 4 Place the Rear Deck on the three supports so that the silver tie-down hooks are away from the dyno and the lip deck plate is resting on the dyno. Line up the holes in the dyno frame with the holes in the deck plate and loosely fasten the deck to the dyno, using Rear Deck Hardware Pack C. Document #

30 Step 5 Bolt the rear deck to the Rear deck supports, using Rear Deck Hardware Pack A. Step 6 Bolt the two Lower Front Deck Supports to the dyno frame. (Front Deck Hardware Pack B) 3-6 Document #

31 Step 7 Bolt the two U supports to the lower Front Deck Supports. (Front Deck Hardware Pack A) Step 8 There is a right and a left Front Deck. The Deck that has a bolt and bracket welded to the underside is the LEFT and goes on the starter side of the dyno. (This is for the carriage and outrigger option) Place the Front Decks up to the dyno so that the lip of the deck plate is resting on the dyno. Line up the two holes on the lip of the deck with the holes in the dyno and loosely bolt the decks to the dyno, using the Front Deck Hardware Pack C. Document #

32 Step 9 Line up the holes in the bottom of the U-Legs with the holes in the Lower Supports and bolt them together, using Front Deck Hardware Pack A. Step 10 Set the rear deck on the supports and secure it just as you did with the front decks. (Rear Hardware Pack A) Step 11 Move the front decks, Rear Deck and Dyno cover as need to align them, and then tighten all the bolts. 3-8 Document #

33 Motorcycle Carriage Contents Motorcycle Carriage Outrigger Hardware Pack: 4-3 / 8 " x 2 1 / 2 " Hex bolts 8-3 / 8 " Flat washers 4-3 / 8 " Nylon Lock Nuts Motorcycle Carriage Installation Step 1 Remove the 5 / 8 " nut and washer from the Outrigger Stud under the left or starter side front deck. (There is also a round pipe shim and washer on the stud.) Slide the Outrigger over the pipe shim and up to the washer. Secure using the 5 /8 " nut and washer, previously removed. Document #

34 The Outrigger can now swivel into the lock channel on the deck to secure it for making runs or swivel neatly under the deck to get it out of the way, when not in use. Step 2 Using the 3 / 8 " x 2 1 / 2 " Hex Bolts, Flat Washers and Nylon Lock Nuts, bolt the carriage to the left front deck. Warning: When using the motorcycle carriage option, install the safety cover on the open drum. Place the lid over the open drum and secure it with two retainer pins. Retainer Pin Open drum 3-10 Document #

35 Chapter 4 Basic Dyno Operation The Dynojet Dynamometer gives state of the art technology, durability, and accuracy that you need. Dynojet s advanced engineering delivers the precise horsepower measurements a technician needs to make quick and accurate evaluations of engine performance and drive train problems. This chapter includes instructions for basic dyno operation. For more detailed instructions, refer to the WinPEP 7 User Guide. This manual can also be found on your WinPEP CD or at This chapter is divided into the following categories: Loading the Vehicle, page 4-2 Connecting the RPM Pickup, page 4-4 Pre-Run Inspection, page 4-8 Making a Test Run, page 4-10 Document #

36 Loading the Vehicle Use the following steps to load a vehicle on the dyno. 1. Verify your computer is running. Set the dyno brake on by pressing the red button on the hand held pendant. 2. Drive the vehicle onto the dyno and align the vehicle straight with the dyno. 3. Stop the vehicle when the drive axle is centered on the drum. center drive axle on dyno drum 4. When the vehicle is positioned properly on the dyno, shut the engine off. If the vehicle has an automatic transmission, place it in park. If the vehicle has a manual transmission, place it in gear. 5. Secure the non-drive wheels using the provided tire chocks. Do not use tire chocks for four wheel drive vehicles. 6. Attach two tie-down straps from the anchor points on the dyno to the rear of the vehicle. 7. Attach two tie-down straps from the anchor points on the dyno to the front of the vehicle. Note: If you are running an all wheel drive ATV, use differential jacks to get the front wheels off the dyno. 4-2 Document #

37 8. Tighten the four tie-down straps evenly making sure that the drive wheels remain centered on the drum. tie-down strap anchor points additional tie-down strap anchor points additional tie-down strap anchor points tie-down strap anchor points Document #

38 Connecting The RPM Pickup Your Dynojet dynamometer includes a primary wire inductive pickup and two secondary wire inductive pickups. These small clothespin like inductive pickups are used to sense RPM. An RPM pickup is required if you want to view torque graphs. Generally you will use one secondary wire inductive pickup on a spark plug wire. Vehicles with wasted spark ignition systems may require two secondary inductive pickups. On a wasted spark ignition, typically one coil will be connected to two spark plug wires. Attach one secondary pickup to each of these wires. If the pickups are connected to two plug wires that do not fire at the same time, an erratic RPM readout may occur. The primary wire inductive pickup senses RPM pulses from the coil. Although this pickup location generally works better, it is harder to find the correct location to connect the RPM pickup. Note: If a pickup is not being used, disconnect it from the dyno electronics to prevent any stray pick up of signals. CAUTION: Inductive pickups are very fragile. The ferrite core can easily be damaged and is not covered under warranty. Dropping, snapping, vibration, and heat can all damage the ferrite core. The dyno electronics RPM module contains the electronics that sense the RPM pulses. An auto-gain circuit looks at only the peak voltage of the vehicle s spark, ignoring the lower voltages to help reduce electronic noise problems. Wasted spark ignition systems will produce a lower voltage level on the exhaust stroke than the compression stroke. By definition of the auto-gain circuit, lower voltage spark levels will be ignored, missing every other spark the vehicle would produce. 4-4 Document #

39 RPM Pickup Descriptions RPM pickup Secondaries (Non- wasted spark system) Secondaries (Wasted spark ignition system) Primary pickup description Use one secondary pickup. Unplug the other pickup from the RPM module and set the degrees between plug fires to 720 in WinPEP 7. Use two secondary pickups. Attach one pickup on each spark plug wire on the same coil and set the degrees between plug fires to 360 in WinPEP 7. Attach the primary wire pickup to the primary side of the coil. Set the degrees between plug fires by taking 720 (four cycle engines) or 360 (two cycle engines) divided by the number of cylinders multiplied by the number of coils. For example, the number of degrees between plug fires on a four cylinder four cycle engine with dual coils (where each coil fires two cylinders) is 720/4 x 2=360 degrees. Document #

40 Connecting the Secondary Inductive Pickup The secondary inductive pickup cannot be in contact with, or it s connecting wire be crossing, other engine electrical wires or stray RF interference may result. 1. Clip the secondary inductive pickup around one spark plug wire. Note: On a wasted spark ignition system, two secondary inductive pickup wires may be needed. 2. Route the inductive pickup cable clear of devices that produce electronic noise (spark plug wires, coil wire, coil etc.) to the dyno electronics RPM module. Note: Inductive pickup placement is important. Position the inductive pickup so that it is not making contact with any other spark plug wires. Separate the spark plug wire from the spark plug wire bundle for proper operation. Note: You must ground the vehicle to the dyno for the electronics to function properly. coil connect secondary inductive pickup on the coil wire connect secondary inductive pickup on the coil wires coil 4-6 Document #

41 Connecting The Primary Inductive Pickup The primary inductive pickup cannot be in contact with, or it s connecting wire be crossing, other engine electrical wires or stray RF interference may result. 1. Clip the primary inductive pickup around the wire to the primary side of the coil. 2. Route the primary wire cable clear of devices that produce electronic noise to the dyno electronics RPM module. Note: You must ground the vehicle to the dyno for the electronics to function properly. coil connect primary inductive pickup on the negative side of the coil Document #

42 Pre-run Inspection Perform a vehicle inspection before making a run. Check the radiator coolant (if applicable) and oil levels. Check the fuel source. Rotate the drum and check for rocks caught in the tire tread that could fly out. Check the tire pressure and tire speed rating. Improperly inflated tires or exceeding the maximum speed rating can result in premature wear or severe tire damage. Make sure the tire has no major deficiencies (cracks in sidewalls, tread life, etc.). Visually inspect the vehicle. Make sure it is in safe running order. Make sure ear protection and safety glasses are used when the dyno is being operated. Check the tie-down straps to make sure that they are tight and secured. Check the drive tires to be sure that they are aligned correctly on the dynamometer s drums. Keep all rotating components clear at all times. Only the operator should be near the dyno or the vehicle during the test. Never allow any person(s) to stand behind the dyno or vehicle when it is being operated. Perform any other safety inspections appropriate to running your vehicle on the dyno. WARNING: Never allow any person(s) to stand behind the dyno or vehicle when it is being operated. Only the operator should be near the dyno or the vehicle during the test. Before Starting the Engine Connect an exhaust hose or hoses (if dual exhaust) on the vehicle, make sure the hose fits over the tail pipe, is not plugged or kinked and the hose is vented correctly out of the dyno room. WARNING: Engine exhaust contains poisonous carbon monoxide gas. Breathing it could cause death. Operate machine in well ventilated area. 4-8 Document #

43 Engine Warm Up Warm the vehicle s engine and drivetrain before beginning testing. Consistent engine temperatures will assure your runs are repeatable. After Engine Warm Up Always leave the vehicle in neutral (automatic transmission) or in first gear (manual transmission), with the engine off, and make sure the park brake and the dyno brake are on when you get off the vehicle on the dyno. Fix any fuel, oil, or coolant leaks that may have shown up after engine warm up and check the carburetor for leaks. Any loud or unusual engine noises or excessive exhaust smoke should be resolved before continuing. Document #

44 Making a Test Run Dyno runs provide safe, reliable road testing right in the shop. The dyno allows you to measure, record, and diagnose performance problems quickly. The dyno combined with WinPEP 7 produces consistent, easily interpretable power graphs. Use the following instructions to ensure repeatable and accurate measurements. 1. Verify the vehicle is secured properly. 2. Place the vehicle in a low gear and release the dyno brake using the hand held pendant. 3. Slowly accelerate the vehicle to 20 m.p.h. 4. Test the tachometer operation. Rev the engine. The gauges on the computer screen should be moving. If the tachometer is moving but not registering the correct RPM values, the number of degrees of revolution of the crank shaft (the plug fires number) is incorrect. Stop the vehicle, return to the MakeRun Configuration dialog box, and enter the correct value for plug firing order. 5. Press the red brake button to apply 100% braking and slow down the vehicle. CAUTION: Using the vehicle s rear brake to stop the drum at speeds over 30 m.p.h. can severely over heat the rear brake parts. Dynojet dynamometers with the air brake or eddy current brake accessory can be used to slow the vehicle and drum to a full stop at any speed. The vehicle s brake should be used in an emergency stop situation only. 6. Shut the engine off and put the vehicle in gear (manual transmission) or neutral (automatic transmission). 7. Set the vehicle s parking brake and leave the dyno brake on. 8. Perform a final inspection. Verify the drive tire s alignment on the dyno drums. Make any adjustments to the tie-down straps as needed. Perform any other safety checks that you deem appropriate to your particular situation. You are now ready to make a high speed run on the dyno. Refer to your WinPEP 7 User Guide for more detailed instructions Document #