TBI Throttle Body Injection discussion and questions. L03/CFI tech and other performance enhancements.

tbi ecm question?

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Old Sep 30, 2009 | 01:34 AM
  #1  
chris.elks's Avatar
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From: booneville MS
Car: 78 camaro, 91 camaro both rs's
Engine: 78 has tpi 355, 91 has stock 305
Transmission: 78 has 700r4, 91 has t5
Axle/Gears: 78-2.73,91-3.08
tbi ecm question?

i have a 91 rs thats i just put a 355 in and i need to know if i would be able to put a 7747' ecm in place of the 7730? would i have to do anything to the vats or could i just leave it be? the reason for this swap is that the person who had the car before me took the ecm out before i got it he had it carbed but i want to put the tbi back on it.
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Old Sep 30, 2009 | 07:59 AM
  #2  
RBob's Avatar
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From: Chasing Electrons
Car: check
Engine: check
Transmission: check
Re: tbi ecm question?

Yes, the '7747 is a plug and play with the '8746 ECM (stock for a '91 RS TBI car). The '7747 doesn't support VATs, so no issue. And as a side note it doesn't have any IAT support.

Note that the '7747 will not directly replace a '7730 ECM. Which is a MPFI ECM in the f-body's (TPI & 3.1L).

RBob.
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