Holley 3310 setup and adjustments

[George Snyder]

ERA 629,

I agree with everything that My427 Mustang suggested you do.

The one thing I would add they may have been over looked is the carb to manifold gasket. If you reused the gasket there is a possibility that the ported vacuum circuit that he mentioned is not sealed from the manifold vacuum. I think I would start fresh with a new gasket if you haven't already. Then follow his instructions.

Take your time setting the idle mixture. The over all performance of the carb is effected by how accurate an idle mixture you have.

I would suggest that you purchase a few extra gaskets. You may be able to flip them over to get two applications per gasket. I am not familar with what the top of an intake on a 428 looks like, so I am saying maybe. I would never use the gasket over using the same side, they are too inexpensive to go thru the hassle if it leaks and you have to start over again.

Lastly, if the budget will allow? Start with Jack's suggestion.

Leave the option open to scrap the 3310 for a Speed Demon 750 double pumper. Demons provide much better a/f management than Holleys across the board. I, like Jack feel that Demon brand carbs are the best on the market.

What may be the best feature of the Demon is that you can set the idle front & rear at what ever you want with the carb on the engine. That feature alone is worth the investment to me!
Secondly, I believe that with the four idle mixture screw you can achieve a more accurate a/f idle setting than you normally would get with just two.
Good luck,
Bud