SGI-5 DD box and T5, 94LT1 PCM.. help
Thread Starter
Senior Member
Joined: Apr 2003
Posts: 690
Likes: 0
From: Nova Scotia, Canada
Car: 89 GTA
Engine: 350 LT1
Transmission: T56
SGI-5 DD box and T5, 94LT1 PCM.. help
I bought myself a pretty Dakota Digital SGI-5 box.. as per recomendations.. now that i have it .. i have absolutly no idea what to do with it
can someone walk me through it?
start with the dip switch settings. then which of the 2 wires or both, do i hook up ot the thing and from where? I assume from the output going from the buffer box to the speedo gauge?
I have
A31 GND PPL
A32 Signal YEL
I also have the same coloured wires coming from the VSS, so I assume they mean the same thing. Also located wire coming from buffer box, going to speedo, its "C" LT GRN/BLK goes to a connector A14 which leads to speedo.
I have located some power and GND sources for the unit.
But that's all I have.. I have no idea where to go next..
Also note worthy to mention the car was a '89 305TPI T5,
non-digtal dash
can someone walk me through it?
start with the dip switch settings. then which of the 2 wires or both, do i hook up ot the thing and from where? I assume from the output going from the buffer box to the speedo gauge?
I have
A31 GND PPL
A32 Signal YEL
I also have the same coloured wires coming from the VSS, so I assume they mean the same thing. Also located wire coming from buffer box, going to speedo, its "C" LT GRN/BLK goes to a connector A14 which leads to speedo.
I have located some power and GND sources for the unit.
But that's all I have.. I have no idea where to go next..
Also note worthy to mention the car was a '89 305TPI T5,
non-digtal dash
Thread Starter
Senior Member
Joined: Apr 2003
Posts: 690
Likes: 0
From: Nova Scotia, Canada
Car: 89 GTA
Engine: 350 LT1
Transmission: T56
i copied this post over to transmissions because it is a bit more relavent.. anyway.. here is some more info..
I have since learned I have to convert a 2000ppm (pulse per mile) 5V DC signal to an AC 17 pulse/driveshaft rev signal.
If tunercat is correct, a 245-50-16 tire = 812 rev/mile . with 3.73 gears, thats 3028.76 drive shaft revolutions. times 17.. =51488.92 pulses per mile .. but it has to be AC..
Currently my VSS is 2000ppm DC ..
I have the sgi-5, but don't know what to do with the switches..
anyone go through this?
I have since learned I have to convert a 2000ppm (pulse per mile) 5V DC signal to an AC 17 pulse/driveshaft rev signal.
If tunercat is correct, a 245-50-16 tire = 812 rev/mile . with 3.73 gears, thats 3028.76 drive shaft revolutions. times 17.. =51488.92 pulses per mile .. but it has to be AC..
Currently my VSS is 2000ppm DC ..
I have the sgi-5, but don't know what to do with the switches..
anyone go through this?





