I am switching to TPI and I have a complete wiring harness and computer from a 1988 350 TPI. My car is a 305 5-speed and what I would like to know is were there any differences in the computer system from 87-88 and will a 87 5-speed TPI prom work in a 88 auto 350 computer. Thanks

Dave

 

From the name of the formum, I *expect* that you'll be doing your own ships in which case using the 89 code / memcal, would be where to start. Buy the right memcal (calibration piece) from the dealer for the closest place to start.
You might ask here for that praticulars on doing that,

 

I am not burning my own, but this forum seems like the best place to ask the question. This is a stock prom from a 1987 TPI 305 5-speed, and the computer is from a 1988 350 auto. I would like to know if the chip from the 87 will work in the 88 computer or if I will need a 1988 chip, or if I will need a whole new computer and chip.

Thanks

 

You can use your 87 TPI memcal in the 88 TPI ecm. 86-89 Fbody TPI all use the same 1227165 ecm.

Refer to: https://www.thirdgen.org/newdesign/f...n.shtml#engine

 

Brent, First off thanks for the link to that page, that was really nice to see.

I am looking at my new computer and the
ECM# 1226870, could you please tell me what this computer is from. I thought it was from a 1988 TA 350, but my number is different than the one you gave. Any insight into this would be greatly appreciated.

Dave

 

Well upon futher investigating, this computer is from a 1985. So my new question is, Can I use this computer with a 1987 TPI prom??

 

Nope, won't work. Even using a manual-tranny chip in an auto-tranny car isn't a good idea. Trust me, I tried it by accident already. Grumpy's suggestion of using a stock chip for that application is the best way to go if you're not burning your own chips.

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Greg Westphal
'87 IROC 305TPI/A4

 

Dump the 85 computer it sucks....

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87z 383,afr 190's, crane hyd roller(224/230-.509/.528,112 sep),Ported and polished mini ram, 24lb inj, 3.42 gears, strange 12 bolt, tremec 5spd, , 1,3/4" slp headers.(stock 305 hypercrap chip), other stealth goodies.
Runs 14's all day long.

 

Will a 1985 TPI wiring harness work with 86-89 ECM's?
thanks

 

The 85 ecm will work with some harness modification but its just not worth it at all. The 85 has a maf burn off module(expensive) and the 86-89 have burn off relays.
I would suggest goto the junkyard and get the 165 ecm shouldnt be more than $50

The 85 ecm just isnt worth it. not good for and kind of scan data.
Denis

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85 vette,383,miniram,ZF6,4.10's..best ET 11.66@1187.00 60' 1.62
w/100HP nirous 11.05@127
http://geocities.com/bowtie8