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Recently I bought a new 650 Holly spread bore, replacing the one the car came with. Rather than rebuild, I decided to go new and kept the same type to minimize hookup problems. Now it has a perplexing problem when making only righthand turns somewhat briskly, as the motor wants to falter slightly until I finish the curve. I might add that I also replaced the distributor.  I'm thinking float problem, but why on right hand turns only? It started with a vacuum leak which may have been the initial problem detected too late. My typical MO is to replace one logical thing at a time until the problem goes away, that way more things get replaced before problems develop. I've followed that system since I bought my 72 Pantera 42 years ago, and it's perfect. However this problem concerns my 72 Vette that I bought 4 years ago for something to fix during the Pandemic. I'm sorry to mention that so late, but you all are always very helpful and knowledgeable. Maybe you'll forgive me for the ruse.

Tom

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Last edited by George P
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Most Holley  carburetors have the float pivot on one side of the fuel bowls. There are more race-friendly versions that have the float on a center pivot

I strongly suspect that you have side hung floats and that is the cause of your problem. If you haven’t already you might try raising the fuel level in your fuel bowls but what can be safely done may not correct the side hung pivot problem.

If raising fuel level a little bit doesn’t solve your problems then your solution would be to buy compatible center hung float bowls and swap them out for what is currently on your new carburetor

Larry

The float is what I am guessing as well, but side hung floats must be a problem for all motors that use carbs such as this. We all like to go around curves. Doesn't it seem odd that the motor would stutter immediately when rounding a corner. Ther must be enough gas in the bowl to cover a short distance. In any event, I'm going to take a look.

Thanks again,

Tom

You bring up a good point with the fuel in the bowl being more than enough to carry you through at least the beginning of a curve.

I think you might want to take a look at your coil and spark plug wires, distributor cap also. Things tend tend to move around going through corners and maybe a wire is loose or damaged and/or arcing to ground.

Larry

Last edited by lf-tp2511

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