Topic: New Carb?
in Forum: C3 Fuel, Emission Control, and Exhaust Systems
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Lifetime MemberModerator
Duncanville, TX - USA
Joined: 11/8/2003
Posts: 20214
Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/
Am-Fm/map light National/Regional/Chapter NCRS "Top Flight"
#2-1985 Bright Red/Carmine Cp.L-98/auto
Member: NCRS, NCRS Texas, Corvette Legends of Texas
[QUOTE=kstyer] Adam, if I can get my hands on that car I can get adjusted to function properly. It's not in need of replacement, just proper setting. Problem is I could not do the fine tuning and adjustment without the running engine under the carb. If you get a new one, you may have the same problem getting it set properly.
I have to agree with Ken first, and all of the others that suggested if it ain't bent, it's fixable. Since Ken has already gone thru it, I can safely assume it ain't bent. Very few rebuilt carbs will work properly without the proper fine tuning with a large mallet and a pry bar.
I'll bet there's more to it than just the carb adjustment, but I bet that'll make a big difference.
You need a good tech to adjust it, not a new carb. For what you would pay for the carb, you could drive here. Bonifide offer.
[/QUOTE]
I have to agree with Ken first, and all of the others that suggested if it ain't bent, it's fixable. Since Ken has already gone thru it, I can safely assume it ain't bent. Very few rebuilt carbs will work properly without the proper fine tuning with a large mallet and a pry bar.
I'll bet there's more to it than just the carb adjustment, but I bet that'll make a big difference.
Joel Adams
C3VR Lifetime Member #56 
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Somehting else to consider...
roadbiker 2008-08-25 11:39:24
(stock) 81's use that horrible A.I.R. system for controlling emissions. The system (supposedly, according to the owners manua) recirculates unburned emissions by grabbing them from the cat and pushing them into the exhause manifolds (hence the ugly plumbing). The computer continuously monitors environmental conditions and electronically and automatically adjusts the carburate (air/fuel mixture) and the timing. For this reason all of the adjustment screws on the carburetor are sealed and can not be manually adjusted unless the seals are drilled out and then adjusted by someone really competent.
When I originally removed the smog pump and cat. from my car, it ran okay, but never great. It had better performance, but there were times when it seemed to hesitate a little. This was apparently caused by the fact that the computer was making improper adjustments because half of the plumbing and electronics previsouly used to monitor exhaust (CO2) were gone.
My ultimate solution was a total disconnection of the A.I.R. system, which comprised of replacing the carb., intake manifold, exhaust manifod, ignition system, and exhaust. It wasn't cheap, but it was well worth it. I saved all of the removed components just in case I sell it someday and the next owner wants the car back to 100% original. I would never go back. The car runs 100x better than before and sounds like a Corvette is supposed to.
Just my 2 cents. I'm no expert, and I could be worng, but I have no regrets. The engine looks, runs, and runs better...
-jim
in Forum: C3 Fuel, Emission Control, and Exhaust Systems
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