90-92 350 L98 TPI SD with a T5, prom question??
Thread Starter
Joined: Aug 2005
Posts: 847
Likes: 1
From: Brunswick, Ga.
Car: 91 Formula
Engine: 350 L98 SD TPI
Transmission: 700R4
Axle/Gears: 10 bolt PBR 3:23 disc posi
90-92 350 L98 TPI SD with a T5, prom question??
Since a T5 was not available from GM with a 350 L98 from 90-92, do you need a prom adaptor to make this combo run correctly?
Joined: Jun 2004
Posts: 917
Likes: 31
From: Las Vegas
Car: '88 Trans Am
Engine: 5.7L TPI
Transmission: Slushbox
Axle/Gears: 3.27
Re: 90-92 350 L98 TPI SD with a T5, prom question??
on mine i used a chip for a vette it was as close as i could get back then (10years ago)without getting an aftermarket chip
you can run with the stock chip without any ILL affects,timing at 12°,crank the fuel pressure up to 44psi and see how she runs..
you can run with the stock chip without any ILL affects,timing at 12°,crank the fuel pressure up to 44psi and see how she runs..
Last edited by 92droptopws6; Dec 30, 2007 at 02:23 PM.
Joined: Jul 1999
Posts: 10,950
Likes: 26
From: Orange, SoCal
Car: 1990 Pontiac Trans Am
Engine: 355 TPI siamesed runners
Transmission: Tremec T56
Axle/Gears: 12-Bolt 3.73
Re: 90-92 350 L98 TPI SD with a T5, prom question??
A 305 TPI 5-speed chip will work ok, but a custom-burned prom will be the best option.
A Corvette prom has the oil tempurature sending unit enabled, which is not on our cars, and will give you a SES light after a few minutes of driving.
A Corvette prom has the oil tempurature sending unit enabled, which is not on our cars, and will give you a SES light after a few minutes of driving.
Thread Starter
Joined: Aug 2005
Posts: 847
Likes: 1
From: Brunswick, Ga.
Car: 91 Formula
Engine: 350 L98 SD TPI
Transmission: 700R4
Axle/Gears: 10 bolt PBR 3:23 disc posi
Re: 90-92 350 L98 TPI SD with a T5, prom question??
I have the 305 TPI 5-speed chip but, if I'm going to do all this work I want it to run the best it can.
At this time I don't want to get into burning my own chip.
Any recommendations on someone to burn a chip for me? TPIS is good but, way over priced in my opinion.
Do you have to use a adaptor or can they just burn the stock chip?
Joined: Jul 1999
Posts: 10,950
Likes: 26
From: Orange, SoCal
Car: 1990 Pontiac Trans Am
Engine: 355 TPI siamesed runners
Transmission: Tremec T56
Axle/Gears: 12-Bolt 3.73
Re: 90-92 350 L98 TPI SD with a T5, prom question??
Check with Ed Wright at http://www.fastchip.com/
Thread Starter
Joined: Aug 2005
Posts: 847
Likes: 1
From: Brunswick, Ga.
Car: 91 Formula
Engine: 350 L98 SD TPI
Transmission: 700R4
Axle/Gears: 10 bolt PBR 3:23 disc posi
Re: 90-92 350 L98 TPI SD with a T5, prom question??
Thx. Kevin91Z for the recommendation.
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