Balael6

I just got a good price on a complete LT1, my question is, I'm currently in the process of running the 749 ecu in my car, does the LT1 have all the same sensors as my current 88 tpi? I guess i'm asking, could I just unplug everything from my motor, drop in the lt1, plug everything back in, and be set? thanks guys.

PJ

wm_sorg

I would not recomend doing this. Depending on the year LT1 you have you will be downgrading your fuel injection from SFI to batch. You will also have isues with the optispark because it is tied into the LT1 PCM.

Balael6

Yeah, i was reading into that. But could I just plug everything into the lt1 block and fuel injection and have it run? It'd be almost like having a tpi to lt1 intake conversion, but with the lt1 block and heads. But other than that the injection will be downgraded, and I can't remember but the 749 code I think has an option for magnetic or optical, would that fix the optispark problems or no? but yeah, other then that, could I use the 350 lt1 in place of everything without switching the computer or anything? THanks.

pj

Z28ricer

iTrader: (2)

Have the intake modded for a distributor like the LT1 intake conversion setups millican sells. plug it right in with a TPI harness and distributor, Painful OPTI removed. System will work fine, it will see boost which the LT1 pcm cant, that more than oversets the minimal loss of Sequential operation.

Kory-88Iroc 350 tpi

iTrader: (1)

Please explain the " it will see boost that the lt1 pcm can't" I guess I don't understand that statement.
The lt1 pcm is light years ahead of the tpi computer. You can tune it in the car in real time with a lap top. It will make more power and run alot better. It will probably be less work in the long run than trying to do what you intend to do.
Just my .02
Kory

Zepher

iTrader: (1)

What software are you running to tune it real time?
AFAIK, you can scan real time, modify your tune, and then flash the PCM. Engine has to be off to Flash it though.

On the LT1 with TPI ecm, you may need to run the TPI throttle body as well.

Kory-88Iroc 350 tpi

iTrader: (1)

Zepher
you are correct. We are using tuner cat. It datalogs real time but we have to stop to make changes. It takes about 3 minutes to load a new program.
Kory