ok heres what i have 383 stroker 460-480 lift cam stock 305 heads performer intake and a edelbrock 600 carb now granted in park it will wrap out mega quick to 7250 rpm's when driving only about 6250 granted i DID have to turn up the fuel pressure for it was only at 1-2psi moved it up to 6 psi but i still dont like the way it runs i want to put something on there to really give me more umff lol any suggestion on what size and/or brand to get?

 

Quick fuel 750 great all around carbs.

 

...How on earth are you winding a 383 up to 7200 rpm with 305 heads?

Carb CFM wont matter too much if your heads can only flow so much. If you suppose a larger CFM carb would help regardless, I'm sure 650-700 would do fine.

 

I know aint it scary lol the main reason i figured it would help is 1 the carb is leaking gas from the inside out 2.i had a leak under the carb it was sucking in massive air and it ran way better until it got warmed up then it would die lol but yeah i love my heads lol

 

With 1.94" intake valves, 305 heads flow as well as 350 heads (assuming we aren't talking about swirlports).

At 100% volumetric efficiency, a 600 CFM carb will feed a 383 to 5400 RPMs. Reving it with no load doesn't count.

Assuming 100% volumetric efficiency, the carb size you need is CID x RPMS / 3456. Assuming a 383 to 5500 RPMs, that's a 610 CFM. Since dual plane intakes actually need a little bigger carb than the formula says, make it a 650. I say 5500 RPMs because that's all a Performer intake is good to - wind it out any more than that before shifting and you're just going to get there slower.

More details on your cam are needed to make sure you're putting together a proper package. Cam lift doesn't mean much - it's duration that's more important. If you've got the cam card or manufacturer/part number, that would help.

 

kk well while i have you attention kid i got a problem and in my years of motor experience and other around me they cant believe this on my intake i can coat it with a flammable substance carb cleaner starting fluid ect. the engine will accelerate as if pushing the gas pedal lol brand new seals all torqued down and nothing no leaking come to find when sprayed around the bolts lol it accelerates my only guess is that metal heats it expands the bolts are made out of a cheaper metal that maybe doesnt expand as much or my threads are ****ed or something idk lol but right now the carb is leaking gas out of its middle area and it sounds like a frigging tractor no joke at idle it misfire but give it some gas and nothing. i thought hmmm well surely the plug wires are up against headers and the spark is dissipating and isnt firing a couple cylinders now nothing at all they were fine lol so i guess its time to replace the carb.

 

What have you got for a fuel delivery system?

 

20 psi tank pump with a mallory fuel regulator set to 6 psi up to the carb