jkentjr1

Does anyone know the best carb for a stock Ford Racing 392 stroker engine for daily driving? I have heard a 650 cfm Demon would work fine, but everything I have read says to go with at least a 750 cfm. Any suggestions?
Thanks!

JBradley500

750

jkentjr1

Thanks...that is what I thought.

Colorado_Mustang

I have a 750 Holley DP on my 390 HiPo which is set up to run 6k (except for the cam).

my77stang

yeah i would think 650-750 and if you wanna DD the car vac. sec. would be alot easier on your wallet

Soaring

I'm not so sure you need 750 cfm. It depends on a lot of other things you may or may not have on that car. So many people seem to think bigger is better and with carbs and exhaust it just ain't so. The size of the carb and the exhaust has a lot to do with your engines ability to utilize it, too much and you WILL actually get less hp. Gotta mix and match everything carefully - carb, cam, heads, valve size, compression and optimum back pressure in the exhaust. Lots of novices go out and buy a big Holley 4bbl, drop it on an otherwise stock motor and think they just gained gobs of power

my77stang

very true, verrrrrrry true.

check our Barry Grant part #'s
1282010VFE (650 vacuum secondaires) "Mild 302 to 427 cid engines" or
1402010VFE (750 vacuum secondiaries) "393 to 477 cid engines & mild 427 to 455 cid engines"

"The Speed Demon is a general performance entry-level four-barrel carburetor. It is designed to replace most standard square-flange carburetors on engines with a camshaft duration up to 240° @ .050"

http://www.barrygrant.com/demon/default.aspx?page=10

scott_m_mil

Yeah, I watched a kid in highschool try to stick a 650 DP on a straight six somewhere around 240 ci. It wasn't even funny. He couldn't figure out why it was jsut constantly bogged down.

JBradley500

im guessing this engine is somewhere between 430-475 horse power and will rev over 6000. that 750 will do just fine.

longlive289s

we do have that carb size calculator in the FAQ section....long as u know how much hp your making now

ah...found it http://www.4secondsflat.com/Carb_CFM_Calculator.html