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Ignition/Tuner/ECM/Fuel InjectionNeed advice on ignition issues? Questions about a tuner? Have questions about a EFI calibration or Fuel Injection? Tips on Engine Diagnostics, how to get codes, and what they mean. Find your answers here.
If you go to Basic Settings under Module Configuration you will see the Speedo Cal. Click on it and you will get the calculator. The pulley teeth method is based on the rear pulley, not the front. (I found out the hard way.) So if you are lowering the front you have to increase the rear pulley count.
If you had a stock 32 this is the math: 32 times the current count = new count
30
The best way to do it is to use the Actual vs. Indicated Speed but you need radar or ride next to a buddy at a predetermined speed to see how far off you are.
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