engine swap from tbi to standard 4 barrel help???? - Team Camaro Tech
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post #1 of 7 (permalink) Old Dec 28th, 02, 10:22 AM Thread Starter
Join Date: May 2001
Posts: 143
here is the deal my father in law has a 93 chevy pickup with a 350 and throttle body injection he wants me to put in a new 350 with a 4 barrel carb and a standard hei dist. so if i run a seperate 12 volt wire for the hei to the fuse box and adapt the throttle linkage for the carb,then mount a triple gauge set for the water volts and oil pressure to bypass all the computer crap what problems may i run into if anyone has ever done this or knows what to look for please reply!!!!!! thanx for any help!!
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post #2 of 7 (permalink) Old Dec 28th, 02, 01:33 PM
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I ran across this a long time ago. http://www.thirdgen.org/newdesign/tech/carbswap.shtml
It's off of a third gen website--not to take anything away from team camaro.
I just like all the ideas I can find and sort out what I think for myself. But it should give you a guideline of somewhat.
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post #3 of 7 (permalink) Old Dec 28th, 02, 02:25 PM
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why does he want to get rid of the TBI? does he not like instant cold weather startup, smooth running, and good power and fuel economy? if it is running bad, maybe it's time for a tune up and a few sensors to be replaced. then, there's the potential legal issues of taking off a federally certified emmissions legal induction setup...

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[This message has been edited by novaderrik (edited 12-28-2002).]
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post #4 of 7 (permalink) Old Dec 30th, 02, 01:16 AM
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I agree with Novaderick. A 93' throttle body system is very simple and way more reliable than any carburetor system ever built. You will run into more problems trying to convert it than you can imagine.
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post #5 of 7 (permalink) Old Dec 30th, 02, 02:40 AM
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The only positive side I see to this is easier fixes in the future. If it doesn't start, it's either fuel or ignition.

There's no sensors or computer modules to deal with. However, If something isn't broken, I wouldn't mess with it.

The other thing to consider is the transmission, and weather or not any of those related components rely on the computer.

68 Coupe, 350 4-speed
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post #6 of 7 (permalink) Old Jan 6th, 03, 04:06 AM
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Ive had friends consider this swap, and some of the things you will HAVE to change is the fuel pump and possibly the fuel pressure regulater. The TBI needs about 18 PSI of fuel whereas a regular holley will only tolerate 8 PSI or so. Youll need to swap that out so you dont over power the carb.

Next, the distributer, since the TBI has computer controlled advance.

Youll also want to swap out the manifold, and fuel lines over to a regular manifold and rubber lines. In my experience, rubber is easier than plumbing in some aluminum ones.

Finally, yank out those dummy lights in the dash. Those are going to drive you up a frickin wall if they are illuminated all the time. Youll need your own gauges to compensate, however.

All in all, this could be a fun swap, but I like TBI a lot. Its like a halfway point between fuel injection and carb.
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post #7 of 7 (permalink) Old Jan 6th, 03, 09:04 AM
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Auto trans, or manual..
if the automatic overdrive, you may need a kit (switch) from b&m or you'll smoke your converter...

double check me...
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