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Old 05-06-2012, 04:16 PM
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Holley help

Hello again hotrodders! I need some help with this carb. It's a street avenger 670 that's been rebuilt fresh and installed. I think there is couple things going but I don't know quite which way to go and would greatly appreciate some direction.

Fresh sbc 350; 9.6:1 compression; 14* initial, 32* all in by 3,000. 4spd manual.

Problem is that when floored from rolling cruise, it's a dog until the secondaries kick in and then it comes alive and will turn the tires off in second gear. I can feel the secondaries open which I know isn't right.

I'm getting ready to change the power valve to an 8.5 from the stock 6.5. It's pulling 17hg vacuum at idle. Jets are at 68 primary and 71 secondary. I've changed the pump cam to blue to get rid of a lean hesitation from idle. I also changed to a 35 squirter which helped a lot.

Last but not least my idle mixture screws are only about 1/2 a turn out from closed which doesn't seem right to me based on the recommended starting point of 1 1/2 turns.

So where am I off at on adjustment?
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