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

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Old 09-30-2009, 02:34 AM   #1
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Join Date: Aug 2009
Location: booneville MS
Posts: 1
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

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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 09-30-2009, 08:59 AM   #2
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Join Date: Mar 2002
Location: Chasing Electrons
Posts: 11,386
Car: check
Engine: check
Transmission: check

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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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Old 09-30-2009, 08:59 AM
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