what CFM?
5th Gear Member
Joined: Jun 2006
Posts: 4,089
From:
RE: what CFM?
Works good with 7000+ rpm...
ORIGINAL: Halz5
i dont like that formula, lol makes me sound stupid to have a 750cfm on my 350 lol
ORIGINAL: Colorado_Mustang
500-600 would be enough.
cfm=(cid*rpm)/3456
500-600 would be enough.
cfm=(cid*rpm)/3456
2nd Gear Member
Joined: Jul 2006
Posts: 444
From:
RE: what CFM?
ORIGINAL: Halz5
i dont like that formula, lol makes me sound stupid to have a 750cfm on my 350 lol
ORIGINAL: Colorado_Mustang
500-600 would be enough.
cfm=(cid*rpm)/3456
500-600 would be enough.
cfm=(cid*rpm)/3456
For a stock 302, though, I would think 500 cfm would be good and 600 would be overkill. And, if your going to increase the flow on one end of your engine, intake and carb (you are doing the intake as well, aren't you?), you're going to need to modify the exhaust as well. Just something to keep in mind.
2nd Gear Member
Joined: May 2006
Posts: 270
From: IL
RE: what CFM?
ORIGINAL: Lumbergh
It also depends on other modifications to the engine. IMO 750 would be too much for a stock 350, but I've seen modified 302s (more aggressive cams, etc) running great with 650 CFM four barrels.
For a stock 302, though, I would think 500 cfm would be good and 600 would be overkill. And, if your going to increase the flow on one end of your engine, intake and carb (you are doing the intake as well, aren't you?), you're going to need to modify the exhaust as well. Just something to keep in mind.
ORIGINAL: Halz5
i dont like that formula, lol makes me sound stupid to have a 750cfm on my 350 lol
ORIGINAL: Colorado_Mustang
500-600 would be enough.
cfm=(cid*rpm)/3456
500-600 would be enough.
cfm=(cid*rpm)/3456
For a stock 302, though, I would think 500 cfm would be good and 600 would be overkill. And, if your going to increase the flow on one end of your engine, intake and carb (you are doing the intake as well, aren't you?), you're going to need to modify the exhaust as well. Just something to keep in mind.
put the 600 from the 350 on the 302... dont know anything about the 302. but it ran like a champ... was very impressed
5th Gear Member
Joined: Jun 2006
Posts: 4,089
From:
RE: what CFM?
Some of your bog may be from the size of the venturi. If you can, slow down the linkage that activates the throttle (move the point it connects higher on the arm). Accelerator pump tuning and possibly metering block changes may help, too.
My 302 loves its 650...as long as I keep it above 2k.
My 302 loves its 650...as long as I keep it above 2k.
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