4. Using the formulae from
another post on this bulletin board (CLICK HERE), a tire size of 30.93 with 4.10 gears gives the following hand calculations:
Tire Rev/Mile of 652.0567
Trans Rev/Mile of 2673.4326
VSS Pulses/Mile of 106937.30.
Using the stock SSR file, HP Tuners gives:
Tire Rev/Dist of 652.04
VSS Tire Rev/Dist -Err of 652.06
VSS Pulses per Mile of 104698 (or 104694 as read from PCM)
What is the reason for the discrepancy between hand calculated values and the values in the HP Tuner fields when using the commit button? Nearly 2300 counts off in the ppm value is a significant error. This seems to be a software bug.