Making a test run – Dynojet 224: Pit Eddy Current Brake User Manual
Page 52
Model 224 Pit Eddy Current Brake Installation and User Guide
C H A P T E R 3
Making a Test Run
3-10
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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.
4a
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.
4b
Stop the vehicle, return to the MakeRun Configuration dialog box, and enter
the correct value for the plug firing order.
5
Press the red brake button to apply 100% braking and slow down the vehicle.
Using the vehicle’s own brakes to slow or stop the drum at speeds over 30
m.p.h. can severely over heat the brake parts. Dynojet dynamometers with the
mechanical brake, 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 brakes
should be used in an emergency stop situation only.
6
Shut the engine off and put the vehicle in gear (manual transmission) or park
(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.