ive got a summit stage 1 intake on the car and the rest of the 302 is stock do you guys think an edelbrock 600 cfm would be good or should i go with a smaller one
If you plan on leaving it stock I would go with a smaller carb. You get Holley 4V carbs in much smaller sizes and should help your gas mileage and not hurt your performance at all.
To add to what Ray said... Make sure to use a vacuum secondary type carb. This way your engine will only use the additional carb size when it needs it. That will actually increase your fuel economy over the 2v carb, assuming you don't go crazy with the size of the 4v carb. Holley makes a nice 570 Street Avenger that has all the 'streetability' bells and whistles. As for the E'brock carbs, I don't think they are vacuum secondary. I have run one, but it was MANY years ago, and I forgot how the secondary circuit functions. I believe it is similar to a Quadraflood... Which has a mix of mechanical influence, with weights or springs to create a sort of hybrid mechanical and load sensitive secondary function. This is not as aggressive as mechanical secondary, but not as economical as vacuum secondary.
the edelebrock carbs are vac secondarys. ive always goten beter performace out of a holey than a edel. carb. that 570 street advenger is the way to go
No. That is the same system as a Quadrabog. The secondary plates open mechanically, then the top plates have a weight/spring that must be overcome to allow air to pass. It's not vacuum, but it isn't totally mechanical either. Sort of a hybrid setup. Doesn't matter. I've never been able to get anywhere near the power or throttle response out of a Quadrajunk, AFB, or the AFB with an Edelbrock label, compared to a Holley. Don't get me wrong, I've tuned them into sweet running "point A to point B" carbs, but a Holley will aways add power.
im looking for something that will hold a tune for a while and i love driving the maverick on trips but i dont want to constantly be tuning the carb right now im running a holley 4160 and it ran really good for a while but not its running to rich and i cant adjust the idle mixtue any ideas on what it might be?
I have always ran holleys on all my motors. I have never had to "constantly tune" any of them unless I changed something else that would affect it. If you have a good clean carb, no trash to clog anything, a correct foat level, then get yourself a good baseline tune you are happy with and forget it. If you are looking for the most efficient tune, I would suggest setting it with a vacuum gauge. This will give you lean best idle mixture and take all the guess work out of it. Thats just my two cents, best of luck. Don't forget if it ever backfires you probably just spent a power valve. Power valves have a number that is vacuum related which is another good reason to check it with a gauge to make sure everything is matched as well as it can be.
finally got it running perfect today!!! its running really good , just needed to take it apart and adjust the floats and change one of the gaskets
Holley has fixed the problem with blown out power valves. There is also a kit to install the back-fire protection into the older Holleys.
