Reply to "Cylinder head identification."

> Dan since you have a set of ported C3's, do you know what the cc's were on
> the intakes and exhausts as you are now running?

Intake port volumes are 217 cc's and exhaust port volumes are 112 cc's.
Mine are ported but are by no means hogged out. 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. My C302's have a little larger exhaust
and flow a bit more on the exhaust side (242 CFM versus 230 CFM) but a
bit less on the intake side (318 CFM versus 331 CFM). In my simulations,
there wasn't a whole lot of difference between the two heads. I have
another set of C302B's which look good but haven't had a chance to put
them on the bench yet.

Dan Jones