Carburetors Carb discussion and questions. Upgrading your Third Gen's carburetor, swapping TBI to carburetor, or TPI to carburetor? Need LG4 or H.O. info? Post it here.

Mpfi to carb

Old 10-13-2018, 03:21 PM
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Join Date: Mar 2018
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Car: 1987 Firebird
Engine: 2.8L V6
Transmission: 700r4
Mpfi to carb

Iím switching my 2.8 V6 over to a 350 and Iím wondering if I have to do is disconnect the throttle cable from the throttlebody and put it out of the carb for it to workÖ And does that mean that I could essentially remove the entire computer?
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Old 10-13-2018, 06:09 PM
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Car: 1989 Pontiac Firebird
Engine: Carb 305
Transmission: WCT5
Axle/Gears: 3.23Posi
Re: Mpfi to carb

I'm sure someone with more experience will chip in, but I am in the middle of swapping a 305-T5 car to carb, and I'll pass along my notes. I assume your car has either a t5 or a 700r4., the 700r4 should just need attachment for the TV cable, and most aftermarket and GM carbs have one. If you by some odd chance have a 4L60E, you need a throttle position sensor, which is available for most aftermarket carbs. If you have a T5, you are good.

The computer on these cars runs the fuel injection but I am not sure if it is connected to the gauges and radio. . .
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Old 10-14-2018, 02:20 AM
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Re: Mpfi to carb

The V6 and the V8 use the same ECM. With some wiring changes and a V8 MEMCAL it could run a V8 TPI setup.

GD
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Old 10-14-2018, 11:58 AM
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Re: Mpfi to carb

Originally Posted by GeneralDisorder View Post
The V6 and the V8 use the same ECM. With some wiring changes and a V8 MEMCAL it could run a V8 TPI setup.

GD
I donít think the 1227302 can drive 8 injectors. It might be better to repin and get a 1227165 and maf. Or get a harness and double check C100 compatibility.
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