PAJAMAZS57

I have a 85 tpi- 350 engine swap in my 91. I kept the computer and harness. Came across the problem i need to repin the 85 harness.And a few other issues. BUT I turned around and bought a harness and computer from a 92 350 tpi setup. QUESTION IS.. Given the 92 engine is Vortec and roller cam etc. does the computer conflict with a none roller Engine? Has anybody done this? Or have any literature etc that can point me in the right direction.

2012sergen11

iTrader: (1)

92 shouldn't be vortec?

As long as cam specs are similar between the 2 factory setups the computer won't care if it is flat rapper or roller, the only tuning required is based on the specs of the cam, lift and etc.

Tuned Performance

iTrader: (92)

use the 730 ecm as is toss the obsolete 870 ecm. If you do have a vortex conversion you can optimize performance with a tune.

PAJAMAZS57

Ok so my 730 ecm with the harness out of the 92 should work with the old style engine. Any tips to look for or recommendation for this transition.

PAJAMAZS57

*typo it's a 86 tpi but taken out if a 85 vett

Tuned Performance

iTrader: (92)

C207 and connector c100 should be the same . Should be a plug and play swap out for the 91 harness assuming it's a v8 tpi. If not there might be differences in the connector pins.
You can compare pinouts here.
http://www.austinthirdgen.org/?pid=19

Tuned Performance

iTrader: (92)

85 would be a 870 ecm slow baud rate , 86 uses a 165 better ecm. If the cars already speed density I'd stick with that. Another thing to consider is does the vats work now. If not you can have the memcal (computer chip) reprogrammed .

PAJAMAZS57

My biggest question is can the 92 tech meld with the old style engine.

Vader

The ECM does not know nor does it care what engine it is controlling, for the most part. There are a lot of TPI setups retrofit onto much older engines in much older cars. I've done a '57 Chevy, '69 Chevy, and '72 Chevy as examples, all onto older version engines.

As mentioned earlier, the valve train will affect the operation so the parameters of the '830 ECM may have to be altered to optimized the operation, especially with different flow rate injectors.

The '730 ECM would be used with a MAP sensor and not the MAF sensor from the earlier '165 ECM. The '730 will also contain its own knock sensor circuits and will not require/work with the ESC system from a '165 setup. As you already know, the wire harness pinning is slightly different between the two types, but that has been well documented elsewhere.

In short, yes, it will work just fine.