helpfull-SGI-5 calibration
Thread Starter
Joined: Jun 2006
Posts: 576
Likes: 4
From: Gobles, Michigan
Car: 92 Ttop Z28
Engine: Cammed 6.0
Transmission: T-56
Axle/Gears: Built 10 bolt-3.90s w/ PBR discs
helpfull-SGI-5 calibration
just wanted to list the calibration i have for my car, a 92 camaro with factory cluster, 3.42s and the t56 swap. the SGI-5c box was easy to install but took me a while to calibrate, hopefully this will save somebody some time.
SGI-5c box
switch positions
1 off
2 on
3 on
4 on
YELLOW wire from origional VSS plug in to output 3
coarse adjustment at 5
fine adjustment at 15
SGI-5c box
switch positions
1 off
2 on
3 on
4 on
YELLOW wire from origional VSS plug in to output 3
coarse adjustment at 5
fine adjustment at 15
Senior Member
iTrader: (2)
Joined: May 2003
Posts: 539
Likes: 3
From: Huntsville, AL
Car: 87 GTA, 88 GTA, 92 TA, 72 RS SS
Engine: 350, 350, 305, 396
Transmission: T56, 700r4, 700r4, T56
Axle/Gears: 3.42, 3.23, 3.23, 3.73
Re: helpfull-SGI-5 calibration
Blast from the past but for future reference this configuration/calibration was spot on for the T56 swap in my 88 GTA.
Joined: Mar 2001
Posts: 10,412
Likes: 2,083
Car: '89 Firebird
Engine: 7.0L
Transmission: T56
Re: helpfull-SGI-5 calibration
All my switch positions are set to OFF with my '89 Firebird. 
Seems there is no consistent answer to that SGI-5 thing. I saw that when I was trying to figure out what to do.
My speedometer is run by OUT4, which is the 4000 pulse per mile square-wave signal that the speedometer requires. Took me all of 2 minutes to calibrate with GPS and somebody in the driver seat pushing buttons.
By the way, the OUT3 that you used is a 8000 pulse per mile AC wave.
Seems there is no consistent answer to that SGI-5 thing. I saw that when I was trying to figure out what to do.My speedometer is run by OUT4, which is the 4000 pulse per mile square-wave signal that the speedometer requires. Took me all of 2 minutes to calibrate with GPS and somebody in the driver seat pushing buttons.
By the way, the OUT3 that you used is a 8000 pulse per mile AC wave.
Last edited by QwkTrip; Feb 26, 2017 at 11:02 PM.
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