I'm hijacking my own thread but has anyone entered all the data in vehicle set up in Harry's. I don't want to spend all the time pulling the stats. Thanks.
I meant to say "Grand Prix Edition", not "Pro". I think I got my wires crossed on another tool that I use.
Anyhow, I wouldn't worry too much about the car details. Make educated guesses about your mods, etc.
Final drive ratio is 3.82, 1st: 3.73, 2nd: 2.10, 3rd: 1.36, 4th: 1.08, 5th .82, 6th .69
(I've seen slightly different numbers, but this is very close)
Are you running an OBD II connection for other car data? The wireless (especially cheap Chinese knock-off) based ones are pretty unreliable.
EDIT: Just saw you already have an OBD reader. Which one? I run a 10Hz external GPS and it makes a big difference (compared to 1 or 5Hz).