Alright i am getting ready to rebuild my top end, i am getting a edlebrock performer rpm cam, performer rpm heads, performer rpm airgap intake, along with a high flow water pump, scorpion performance (endurance series) roller rockers, hardend push rods, high torque starter, among quite a few other things. Now all this is going onto a stock 302 bottom (not looking for a racer just a rumbling street car). Now i need help with a carb the head intake cam combo suggests a 600 -800 cfm carb. I am thinking about going with a holley 770 cfm street avenger or would this be overkill? Maybe go with a 650 cfm? Any tips?

 

Stay away from street avengers. I ran one and then i switched to a Holley 650 DP.

I would go with a 650 if it were me.

 

what problems did you have with the avenger that made you change to a double pumper?

 

They always run on the rich side. I was running a 670 Avenger. The 650 double pumper performed much better and responded to the adjustments much better.

 

I'm running a Quick Fuel Mechanical 650 on mine. QFT and other offer carbs that are more expensive than an entry level Holley, but have more adjustability if it's needed.

 

I agree with Stallion.

 

I'm running an Edelbrock 600 CFM Carb. I ran it for 3 months now and I haven't had a problem.

 

stay away from edelbrock carbs. they make good stuff but there carbs wont last. as far as what u need it depends on what you want. if you want better fuel mileage then a smaller cfm. but if u want quick revving engine then go bigger. i'm not displacing what 87 stallion says but imo i havent had any avenger issues. for a street carb tho i think a dp would be a bit much

 

I agree with the 650 DP. Personally I believe a 770 will be too big no matter what the brand is. Stick with wat you know and dnt get too big of a carb! 650 double pumper should do the trick!!

 

I run a 670 street avenger and have no issues, but I've never compared it to a 650dp either...