Ok.

I am trying to get a 2000 T/A dialed in correctly. I have the tune spot on, but shift points and the speedo are off. Obviously I want to get the speedo sense and accuracy correct before I adjust shift points. The owner of the car installed 3.73 gears and a 3500RPM stall.

This is what is happening.

I am entering the tire size and gear ratio into the calculator.

275/40/17 and gear ratio of 3.73.

The calc wants to give values of:

TOS rev/mile = 2931.52
Pulse/mile of = 117261

The stock numbers are:

TOS rev/mile = 2615.3906
Pulse/mile of = 104612

The cars speedo shows 61 MPH and both my dyno and GPS says 54 MPH.

If I try to manually enter a number higher than 107239 it reverts back to 107239. It will accept the 2931.52 TOS value, but not the Pulse/mile speedo correction.

When I apply the numbers generated by the speedo calculator it holds the 107239 value and allows the TOS value.

The EFI-Live version of my V2 is V7.4.2 Build 622

Obviously the lower the Pulse/Mile value the faster the speedo will read over actual so how do I compensate without throwing the shaft revs per mile off?

Thanks much!
-Kenny
Your friendly Colorado Springs EfiLive cheerleader!!