Thread: 70 350 chevy engine misses/bogs

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If your Corvette is stock, it should have L46 350, 11:1 compression 350hp Engine. Stock carburetor is a Q-Jet.

The optional LT1 was a solid lifter engine, 11:1 compression, a high-performance camshaft, and used a Holley four-barrel carburetor on an aluminum intake to produce 370hp.

In either case, I’d recommend running a tank of the best fuel you can find and a couple cans of performance cleaner (additive) and see if that helps. If not, a good rebuild on the carburetor may be in order. It sounds like something is hanging in the transition to wide open throttle. Rebuild kits are readily available, but make sure you get all the numbers (especially from the Q-Jet). If you’ve never done a rebuild, you may want to solicit some help.

Pull your air cleaner and take some pictures and there will most certainly be some folks with ideas and suggestions for you.

Regards,
Glenn

Originally Posted by glennsexton

In either case, I’d recommend running a tank of the best fuel you can find and a couple cans of performance cleaner (additive) and see if that helps. Regards, Glenn

Glenn,
How do you feel about SeaFoam, sucked slowly into the system using the vaccum hose normally hooked to the power brake booster as a cleaner with another can added to the gas tank to clean the carb? I have done that, letting it suck the last 1/4 can fast to drench internals, let it soak overnight and then start it in the morning. Smokes to high heaven, but loosens up deposits.