Speedo Calibration
06-03-2008 | 09:30 PM
#1
Thread Starter
Teching In
Joined: Mar 2008
Posts: 14
Likes: 0
From: IL,AZ. U.S.A.
Speedo Calibration The stock 3.23 diff shot the bed. A friend gave me a 3.90 complete since he added a 9 inch. Can I use a Tech II to change the gear ratio or do I need a tuner program. Car is a stock driver, no mods.
06-19-2008 | 10:16 PM
#3
Dont know if you can change it w/ a handheld. But get someone to tune it for you. It takes a change of exactly 20% on your speedo. That will put you dead on. It is done by %, not mph difference.
