Carb Question?

[IICrazy]

I'm looking at a road demon carb and not sure what CFM rating to get. here's what I have done.

- Headers, intake, ignition, dual exhaust, gonna add a cam soon as well.

625? or 725?

 

[COBRAIIW]

625cfm is more than enough for a small block that's not seriously modified.
The 351W that I had in my other II had a 600cfm Holley that worked great!
It had very little modding done.
My 302 is got some more serious mods,and I'm running a 650cfm double pumper Holley.

 

[77sleeper]

390-525 would most likely give the best power, so of those choices, 625

 

[1badII]

What 77 sleeper said. The Demon's flow more than what they're advertised at, so for your engine, I'd go with a 525. But of the two choices, the 625 Road Demon.

 

[Blue Thunder]

I run a 750 race demon on my 332". A 725 would be overkill on a 302, unless you plan on making power over 8000 rpm with it.

 

[myfirstii]

I ran the 625 road demon on my old setup. Stock engine with a mild cam, and a edelbrock rpm airgap intake. I loved it. Its very easy to tune. It is definitly worth the money.
Pat

 

[zwhitr]

Id say 625 if you have dual plane intake
lower if you have a single

 

[Darkhorse845]

625 CFM