1985 Corvette (L98, automatic) Reprogram?
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1985 Corvette (L98, automatic) Reprogram?
With a stock 1985 Corvette automatic transmission, is there any measurable performance increase (acceleration, namely) possible by re-tuning through the OBD1 using another chip? Are there any options to replacing the chip (piggy backing, custom eprom chip, etc.) that increase performance?
Last edited by RJH3; Sep 6, 2018 at 10:49 PM.
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From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: 1985 Corvette (L98, automatic) Reprogram?
IMO the best performance change you could make would be to ditch the 870 ecm and use a 1227165.
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Re: 1985 Corvette (L98, automatic) Reprogram?
Thanks for taking the time to respond to my question. I am pretty ignorant, but a quick learner, and I have a friend who is a great mechanic and electronics wizard who likes my new/old Vette. Could you tell me more about your suggestion? Do both sets of numbers refer to a different ecm? Are these associated with the 85 L98’s OBD1?
Joined: Dec 2004
Posts: 16,737
Likes: 994
From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: 1985 Corvette (L98, automatic) Reprogram?
Here is a page on the differences between the 85 1226870 and the 86-89 1227165 ecm.
https://www.eecis.udel.edu/~davis/z28/ecm_swap/
how to rewire for the ecm change
http://f-body383.tripod.com/AAB/870-...pRepinning.htm
https://www.eecis.udel.edu/~davis/z28/ecm_swap/
how to rewire for the ecm change
http://f-body383.tripod.com/AAB/870-...pRepinning.htm
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