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1982 Corvette Crossfire to Carb Conversion Results
Man i am so happy I did this. Car runs so smooth now, idles awesome, and runs great. No more inconsistent idle, high revving, or erratic stumble. And before people chime in saying that i should have kept the crossfire and that its a simple tbi system. Yes it is and no it aint at the same time. I have a 95 single cab chevy stepside and its a tbi. Now that is a system that is reliable and runs as it should. These crossfires are too damn nit picky and parts were so hard to come by. Got tired of paying hundreds of dollars for $20 parts that werent gauranteed to work. Not to mention the ECM that are destined to fail, no refurbished ones available, and wasnt about to send my ECM out to get fixed and come back with exactly the same problem or have a new one pop up. Bottom line if your crossfire runs like sh** and you have tried it all quit wasting your money throw a carb on that MFer. You wont regret it. Ive put more miles on my vette in the last month than the whole year and half before of owning it. Plus you know your car is gonna get you home. Love my corvette now!! So much fun to drive and with a big a** smile when cruising all the time!!!
How do you control your fuel pump, is the ecm still in the car?
Mine still runs off the ECM, It does that 2 second prime with the ignition on and then runs when it gets a signal from the distributor, and the oil sending unit plays a part too that I;m not 100% sure of... I'd like to eliminate the ECM totally...
My 82 was converted by Bubba to a carburetor. When I took of his junk carburetor and put a Holley Street Warrior on and I was surprised that the fuel pressure was 7 psi and I'm not sure how he did it. It does have an electric fuel pump, I can hear it run when I turn on the ignition. Where is the ECM located at on an 82?
Do you strip out all the wiring in engine compartment when you do these carb conversions and just run an ignition wire to Distributer and a hot wire to electric choke?
or do you just disconnect the IAC terminals.
I think if I did it I’d start with a basic wiring harness….kinda hot rod style.
How do you control your fuel pump, is the ecm still in the car?
Mine still runs off the ECM, It does that 2 second prime with the ignition on and then runs when it gets a signal from the distributor, and the oil sending unit plays a part too that I;m not 100% sure of... I'd like to eliminate the ECM totally...
Thanks 60,
I completely took out the ECM. im using a fuel pump controller from Revolution Electronics. Does exactly what the ECM did in priming for 2 seconds. Uses a signal from dist to cut off pump in case of an emergency/accident.
Not saying that i gained any horsepower or anything like that, but before when i had it stock i couldnt peel the tires no matter how hard i mashed on the gas. When i did the conversion i took off all the smog pump junk, gutted the catalyic converter, added a DUI dist, MSD wires, Edlelbrock intake, and Edelbrock carb. Man i can peel tires now by literally just tapping the pedal now. Way more fun to drive.
My 82 was converted by Bubba to a carburetor. When I took of his junk carburetor and put a Holley Street Warrior on and I was surprised that the fuel pressure was 7 psi and I'm not sure how he did it. It does have an electric fuel pump, I can hear it run when I turn on the ignition. Where is the ECM located at on an 82?
What did you use for the distributor/ignition power sourced, switched...?
Does this box hook up to the pump relay or all the way to the pump...if relay which pin or wire?
If I pull the 20A ECM fuse in the battery box it won't start so the ignition source has to still be tied to the old harness/ecm...
What did you use for the distributor/ignition power sourced, switched...?
Does this box hook up to the pump relay or all the way to the pump...if relay which pin or wire?
If I pull the 20A ECM fuse in the battery box it won't start so the ignition source has to still be tied to the old harness/ecm...
60
Loose the Crapfire Injection and never look back. No need to overly complicate this. Install a relay by the battery. Connect a switched ignition source to the relay. OEM wiring to the pump and fuel sender. Painless Fuel Pump Relay Kit
https://www.summitracing.com/parts/prf-50102
Last edited by TorchZ51; Jan 31, 2025 at 09:26 PM.
Loose the Crapfire Injection and never look back. No need to overly complicate this. Install a relay by the battery. Connect a switched ignition source to the relay. OEM wiring to the pump and fuel sender. Painless Fuel Pump Relay Kit
Nice looking engine bay...Mine needs some work but it runs great, the PO put a blueprint crate in it but if that was done like a lot of other things I've found I have a few surprises ahead...
I may just go mechanical pump and be done, that will involve pulling the sending unit out and either replacing it or removing the pump.
My other concerns are switched ignition source and loosing the tach signal whn I do away with the ECM, not sure how that works..
Any advice is welcomed and sorry to hijack the thread, I'll start a new one when I get ready to do this-(warm weather)
Nice looking engine bay...Mine needs some work but it runs great, the PO put a blueprint crate in it but if that was done like a lot of other things I've found I have a few surprises ahead...
I may just go mechanical pump and be done, that will involve pulling the sending unit out and either replacing it or removing the pump.
My other concerns are switched ignition source and loosing the tach signal whn I do away with the ECM, not sure how that works..
Any advice is welcomed and sorry to hijack the thread, I'll start a new one when I get ready to do this-(warm weather)
60
As for the ignition on I used a wire from the WOT relay that opens the vent in the front for my electric choke. I assume the same wire can be used for the distributor... I'll look in a bit to see what color wire it is... IIRC it's well can't remember.
My other concerns are switched ignition source and loosing the tach signal whn I do away with the ECM, not sure how that works..
The ignition/distributor power and the tachometer output is completely separate of the engine management/CFI system so you don't have to change anything with that. Interesting enough the oil pressure sending unit wiring is part of the engine management wiring so that's one wire that will need to be connected if you decide to remove all of the engine management/CFI wiring. If you just remove the ECM, you don't have to do anything.
Last edited by Fly skids up!; Feb 1, 2025 at 01:20 PM.
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1982 Corvette Crossfire to Carb Conversion Results
