318 replacement cams....

I'm using Summit's other house brand cam in the Demon and am pleased with what it does. From the documentation that came with it, I assume it's a Crane Fireball. I'm using it on a 318 with 302 heads, Performer, and stock exhaust manifolds. It seems to pull well from anything above idle. Since the car and motor are pretty much Frankenstein jobs, I am unable to give you any before and after comparisons.

I suggest that if you pull the heads, treat them to a basic valve job, new seals, and a cleanup of the valves and seats. I did this as well as a little cleanup of the valve pockets and new valve seals. The heads were fairly true, otherwise I would have planed them to get a good seal with the head gasket and block.


Product Line: Summit Racing® Camshafts

Summit Racing Part Number:SUM-6901



Cam Style: Hydraulic flat tappet

Basic Operating RPM Range:1,800-5,500

Intake Duration at 050 inch Lift:218

Exhaust Duration at 050 inch Lift:228

Duration at 050 inch Lift:218 int./228 exh.

Advertised Intake Duration:276

Advertised Exhaust Duration:288

Advertised Duration:276 int./288 exh.

Intake Valve Lift with Factory Rocker Arm Ratio:0.441 in.

Exhaust Valve Lift with Factory Rocker Arm Ratio:0.441 in.

Valve Lift with Factory Rocker Arm Ratio:0.441 int./0.441 exh.

Lobe Separation (degrees):114

Computer-Controlled Compatible:No

Valve Springs Required:Yes