Reply to "Edelbrock 351C Head Flow Numbers"

> How much did it cost to port the C302 heads to get them to flow these numbers?

I don't know. I bought the heads in ported form. Seller claimed 358 CFM peak
but that was on a different bench and flow over 0.600" lift didn't matter to
me as I'm using the heads on the street with a cam of 0.620 maximum lift.
The guy who ported my last set of (aluminum Buick V8) heads gets $700 for a
full port job including valve job.

> What was the final intake volume/exhaust volume of the ports?

Intake port volumes are 217 cc's and exhaust port volumes are 112 cc's.
Plenty of material left if you wanted to go larger but these flow well
enough for my use. I've seen numbers as high as 364 CFM from C302B's
and a local porter gets over 350 CFM from his standard port job on them.
At the manifold face, the intake ports measure 2 1/4" tall by 1 3/8" wide
and the exhausts measure 1 5/8" by 1 1/2" (D port flat bottom with circular
roof). Valves are 2.19" diameter intake and 1.65" diameter exhaust.
Relative to the valve diameter, the heads have a small minimum throat area
with tulip valves on the exhaust side.

> Race teams liked the C302 heads better then anyone else.

The C302 heads were designed to be ported. The trend continues with the
latest Ford race heads. They are delivered with ports your thumb would
get stuck in. They are just holes to locate the CNC machine. The smaller
the port, the more room the porter has to work with.

> I think the A3 head is the best value out of the box accross the board,
> but that's just my opinion. At half the price it's twice the head.

Yup, they are good bang for the buck. They flow enough to support 750 HP
with little work. The port volumes work better on larger displacement engines
but they still work fine on standard 351C's, assuming the rest of the motor
is built correctly.

Dan Jones