Thread: 390 c6aeu head flow #'s

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does anyone know what kind of numbers the stock 390 heads flow. i need to know the volume of air flow through the intake and exhaust runners any help is greatly appreciated .

Call up your favorite cam grinder and talk to one of the tech guys. They'll have a much better idea than any of us on this board.

RAN THIS UP ON THE ENGINE DYNO PROGRAM, NOT MUCH OF A FORD GUY,ASSUMING YOU HAVE BIG TUBE HEADERS ON MUFFLERS
HIGH PERFORMANCE PROFILE AT ABOUT .410 LIFT,STOCK HEADS
YIELDS ABOUT 270 HP@4000 RP'S ,313 FT #'S TORQUE WITH A 750C.F.M. CARB,DOESN'T SEEM TO GAIN ANYTHING IF YOU GO ANY BIGGER!

Here is the most awesome site I have found for a compilation of head flow numbers, by Stan Weiss. I dont know him but must be a very helpful fellow to post this for everyone!!!


http://users.erols.com/srweiss/tablehdc.htm

Some of the Weiss numbers are "ported" - maybe without saying so -

I think the 390's, unported, flow about 220cfm intake at .500 and 28", and the exhaust about 135.

The Edelbrocks are about like 427 Medium Risers at about 265 intake and 185 exhaust.

Cobra Jets (I think) are about halfway between these two.

Sad thing is, a lot of Chevy and Ford SMALL block heads outflow any of these today. But help is on the way, the FE is getting popular again.

up here in canada i talk to this guy john yelich at cylinderheadworks.edmontonab.com