I just reprogrammed my car with HPP and set it to 3.73. My speedometer now is still off, but is too slow instead of too fast. How can i fix this? BTW i have the 17 inch eagle f1's, and i might have given it the wrong tire height, what is the right one?

 

your tire hieght is 25.xx most people use a 25.5 or so...

go to good years site and get the correct tire hieght

 

I agree with PhantomTA, chances are it's just your tire height that is off a little.

 

If you send me an e-mail to remind me, I'll send you a spreadsheet that I have. It will tell you what to enter into your programmer to calibrate the speedo based based on your gears, wheels, and tires.


ws6@blackws6.com