jagamajajaran

My '64 is running rich and adjusting the carb is beyond my knowledge base at this time. I'd like to find someone with Corvette knowledge and experience to take the car to. Is there anyone around me or near me? Any recommendations? Thanks!

Merry Christmas, everyone!

RestoMike

No need for a 'Corvette specialist' as the carb/engine combos are fairly common across the Chevrolet line at that time. A competent mechanic should be able to supply your car with a fix. You don't state which carb/engine option your '64 has. Where in Oklahoma do you live?

jagamajajaran

Thanks for the reply. I live in Cache, just west of Lawton. I've included photos of my carb, because I'm not competent enough to say for sure which one it is. Here's what happened...at the end of a parade, the cap on a fitting on the top of the manifold behind the carb came off resulting in a vacuum leak. I didn't know what was causing the leak at the time and I drove the car briefly with this condition. There were several backfires, which I suspect did something to the carb? I'd like someone with good carb knowledge to take a look at it. My mechanic didn't really do anything with the carb when he had it and I don't know what his experience is with these things. I just know they can be tricky and need to be tuned with the car even after they have been gone through off the car. The engine is a 327/300 but has been bored to 350. I'm at the very beginning of the learning curve on these things, so don't make too much fun of me if I say something silly.

Donald #31176

The backfire probably wasted the power valve in the carb causing your richness. To test whether the valve is bad is to plug the front carb vent while the engine is running. If the engine stalls the valve is defective.

jagamajajaran

I'll test that. Is there a good diagram of the carb parts that I can reference? I basically no nothing on what is what on the carb at this point, but want to learn.

RestoMike

Donald is on to something. I concur with his initially assessment.

donbayers

Hey fellow Okie!

Don't feel alone. We are here with you.

Some very knowledgable folks on here. You can do this

Wish you were a little closer to Yukon. Shop full of guys over here.

My advice is to provide as much info here as possible and include pics.

Looks like you have a Holley carb rather than a Carter which was original to a 327, 300hp for 1964.

We are lucky to have a top notch carb guy in Ok that can help you with repair and tuning.

How was it running prior to this insident?

Would be great to meet sometime.

jagamajajaran

Hello! Thank you for the information. It was running great before this incident. I lived in Yukon from 1996 to 2001, actually. I could bring it up there sometime if you point me in the right direction. That would be great!

SI67

Looks like (someone will correct me if I'm wrong) you may have the intake manifold for the L76 365 HP solid lifter engine and a Holley 2818 carb as used on both the 1965 L76 365 HP and the L79 350 HP hydraulic lifter engine. The direction the oil filler pipe is angled (toward the passenger side) and the style of cap are what make me think it's the L76 manifold.

Does sound like the power valve is blown. If you keep driving it while it's running way rich, you'll foul the plugs to the point where it won't run, so I recommend that you don't drive it until it's been fixed. As they say a lot on this Forum, "Ask me how I know!"

OK, that exhausts MY knowledge. Welcome to the community. and good luck.


Steve

JohnZ

Both the L-79 350hp and the L-76 365hp used the same intake manifold (casting #3844461) and the same Holley carburetor (2818-1).

donbayers

Ok, call Richard Simon in OKC area. 405-650-7644. Be sure to provide all details on the exact carb you have. Hope this helps.

jagamajajaran

Thanks to everyone for reaching out to help!

jagamajajaran

Taking a look at the pic I attached, did I test the right thing? I plugged the vent that I pointed to in the photo while the engine was running and it didn't stall. Did I plug the right vent?