If we take a simple testrun from a dead stop to 120 MPH and have a OBD-II scanner recording we can analyze and obtain a lot of important information.

Here we have the scanner graphing some of the parameters that were recorded.

From here we can see the cause and effects of shifting manual trannie and wheel spin



Here is some of the raw data from the scanner exported to a spreadsheet



Here is the scanner raw data graphed out in a spreadsheet to see the effects of shifting, wheel spin to elapsed time and MPH



If we remove the time for shifting and wheel spin you see how the performance of the car would be and the gains if tires had good traction




Taking that scanner data we now can have spreadsheet math done and compute the rearwheel dyno numbers


Adding data as to gear ratios of MN6 and rearend we can also compute the maximum RPM and speed for each gear

This example is to inforce how much important information can be obtained by using a good OBD-II scanner and taking the time to use it and analyzing the data.

This type of data is very useful when tuning and comparing how a car is performing in differnet types of racing so be sure to have a good scanner and use it often for the more you do the more payback you'll get in making use of the data.