85 tpi ECM

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Nov 5, 2000 | 11:09 PM

mirage2991

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Joined: May 2000

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From: Daytona beach, FL

85 tpi ECM

what's the deal on those? any harder to program? I'm thinking of changing it to a later model (87?) so I can get a 350 chip from GM ( for my 355)to replace my 305 one. Also, is the fact of changing the ecm would make the car perform better?

Thanks

Nov 6, 2000 | 08:00 AM

TC602

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Joined: Dec 1999

Posts: 183

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From: Peoria,Az,USA

Car: 86 IROC

Engine: ZZ4

Transmission: T5 WC

Mike Davis did the ECU swap for 85 to 86,and then from 86 to 90. Go to his web page and check it out. www.eecis.udel.edu/~davis/z28/

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86 IROC T5
MSD 6A
Summit cam
Flowmaster
AFPR
ADS chip
Lowered 1.5"

Nov 6, 2000 | 10:40 AM

Grumpy

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Joined: Jun 2000

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From: In reality

Car: An Ol Buick

Engine: Vsick

Transmission: Janis Tranny Yank Converter

Quote:

Originally posted by mirage2991:
what's the deal on those? any harder to program? I'm thinking of changing it to a later model (87?) so I can get a 350 chip from GM ( for my 355)to replace my 305 one. Also, is the fact of changing the ecm would make the car perform better?

Thanks

By current standards the 6870 (MY85) is just primitive. It was the first of the TPI ecms and was obsolete almost immediately.
If you going to go to the work of updateing ecms go to the 90-92s, and MAP system. Far easier to work with and on failed MAF sensor will pay for the whole deal.