Recommendations for a carb/mani

[565bbchevy]

Just for comparison Edelbrocks Performer package for Buick 231 comes with a 500 cfm 4 barrel carb.
I don't know what cam you have or if is similar to this one.
http://www.jegs.com/i/Edelbrock/350/5486PK/10002/-1

 

[L67ss]

I was thinking the 350 cfm would be better for throttle response

 

[pontiacgp]

it's the amount of cfm's that flow through the engine, rpm increases the cfm but a cam does not. I agree with the others that a 350 cfm carb or a Rochester duel jet.

http://www.4secondsflat.com/Carb_CFM_Calculator.html

 

[565bbchevy]

I have always found that the CFM calculators like to stay on the conservative side since they don't require anything other that the most basic information.

 

[pontiacgp]

the size of combustion chamber does not change with a cam or headers or an intake, bored over engines increase the combustion chamber but marginally so there is no need for a higher cfm carb unless your running the engine at high rpms. When we ran in the Luca Oil Sportmans series we ran a built engine that could run at 8000 rpms the whole day, we switched cars so we ran a 604 crate. The carb we were limited to in that series was a holley race version 500 cfm

 

[MrSony]

Do you know anything about the cam, compression ratio, what's been done to the heads? if not, on the safe side get a 500cfm two barrel. that's about as large as you'd want to go. Or of course, you could always go with a q jet.... impossible to over carb with a q jet.

 

[olds307 and 403]

You will get better mileage with this carb and still be decent to drive. Many people with small motors use the Holley 390 cfm carb.
https://www.google.ca/url?sa=t&sour...tCF8SJQ4nHeWaUi4g&sig2=mHM3sSXGVT6e9RhTdBntpg

 

[88ss408]

I would get a 500cfm edelbrock. And tune it . If you have a 4bbl intake headers dual exhaust and cam. I am sure it will like a 4bbl.