Speedometer calibration
Burning Brakes
Joined: Feb 2006
Posts: 1,098
Likes: 1
From: Webster Texas
I have it in my 84. Changed from 3.07 to 3.75 gears. It's dead on. Uses dip switches to adjust the output from the trans to speedo. Instructions are easy and so was installation. Best part is, if ya change gears again you just reset the switches again. A lot easier than changing the gears in the trans etc.... IMHO
Melting Slicks
Joined: Aug 2003
Posts: 3,401
Likes: 397
From: Lakeville MI
There are some much cheaper options available including standard vss drive and driven gears.
For a calibrator, I like the Dakota Digital SGI-5. I have an older version (revision A) with dip switches that works fine. I think the newer models use buttons for programming the correction factor.
http://www.dakotadigital.com/index.c...rod/prd126.htm
For a calibrator, I like the Dakota Digital SGI-5. I have an older version (revision A) with dip switches that works fine. I think the newer models use buttons for programming the correction factor.
http://www.dakotadigital.com/index.c...rod/prd126.htm
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
The calibrator is a good way to go if you have money to burn or a troublesome ratio change to match up to. Otherwise, stock Chevy gears will usually do the job for 10.00 to $30.00.
RACE ON!!!
RACE ON!!!
Le Mans Master
Joined: Dec 2004
Posts: 5,488
Likes: 1,352
The speedo gears are not hard to change either. 
