1990 TPI LS Swap tach & speedo
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Joined: Jun 2014
Posts: 19
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From: Sacramento, CA
Car: 1990 Iroc-z
Engine: LS3/LSA blower
Transmission: T56
Axle/Gears: 3.27
1990 TPI LS Swap tach & speedo
Can someone please point me in the right direction, I've spent a 3 days trying to search how to get the speedometer and tachometer to work with my swap. The car is a 1990 TPI IROCZ, which now has been swapped with 5.3L T56 ..I have the Dakota Digital SGI-100BT, all i can find is information for people that have the vss buffer box, that states to tie into the k pin which I don't have.Please someone help me out
Joined: Dec 2004
Posts: 16,773
Likes: 1,002
From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: 1990 TPI LS Swap tach & speedo
Pin D at c207, grey wire. The ecm was the Vss buffer
https://berlinetta.info/C207.htm
https://berlinetta.info/C207.htm
Joined: Dec 2004
Posts: 16,773
Likes: 1,002
From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Thread Starter
Junior Member
Joined: Jun 2014
Posts: 19
Likes: 0
From: Sacramento, CA
Car: 1990 Iroc-z
Engine: LS3/LSA blower
Transmission: T56
Axle/Gears: 3.27
Re: 1990 TPI LS Swap tach & speedo
Attempted to wire it up the tachometer directly to the back of the wiring of the cluster with no luck, used pin 7 passenger side..I even changed the the signals to the sgi from input 4cyl to output 8cyl
Member
Joined: Jan 2008
Posts: 329
Likes: 99
From: Mint Hill, NC
Car: '90 Formula '88 GTA
Engine: 305 TPI 350 TPI
Transmission: T5 700R4
Axle/Gears: 3.42 10 Bolt 3.27 9 bolt
Re: 1990 TPI LS Swap tach & speedo
https://www.dakotadigital.com/pdf/SGI-100BT.pdf
hope this helps a little, I have not done it myself yet but will be doing it soon, the sgi-100BT PDF covers all the different scenarios - I beleive Page 8 covers the setup for our speedos APPLICATION #3 (H-L) (someone correct me if I'm wrong)
http://www.skulte.com/T56.html' The f-body T56 has a 17 pulse per driveshaft revolution VSS signal generator in the tailshaft. This has to get converted to a 4000 (or 2000) pulse per mile signal for your VSS buffer input. dakota box is spliced in between the transmission and chassis wiring.'
hope this helps a little, I have not done it myself yet but will be doing it soon, the sgi-100BT PDF covers all the different scenarios - I beleive Page 8 covers the setup for our speedos APPLICATION #3 (H-L) (someone correct me if I'm wrong)
http://www.skulte.com/T56.html' The f-body T56 has a 17 pulse per driveshaft revolution VSS signal generator in the tailshaft. This has to get converted to a 4000 (or 2000) pulse per mile signal for your VSS buffer input. dakota box is spliced in between the transmission and chassis wiring.'
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