Cam Decisions

[Troy]

Howdy you All,

I'm looking to change out the cam in my '55 Belair engine. It's a '75 350 SBC I think it's 8:1 compression. When I rebuilt this engine back in the '80's I put a stock spec. cam in it because it was my daily driver. Now that it's going to be a driver, I want it to up the cam specs a little, and make it a little lumpy (not to lumpy) does anyone have a good cam spec for this. Thanks!!!

[Dragsix]

Call Schneider Racing Cams in San Diego. The owner is Jerry Cantrell, he usually answers the phone. Tell him all the specs for your car, what you want. Let him make a recommendation, and then buy his cam, lifters, springs, oil and lube. He will grind you a cam for your car, not just something sitting on the shelf. BTW, real GM cams have pretty decent metallurgy. If the cam in the motor is decent, and the lifters are working and decent, Schneider can regrind your cam. Might save some trouble with the issues that seem to be running amok with new cam cores. As for the lifters, Schneider use to regrind lifters. Ask if they still do that. If not, ask for the specification that Schneider would want for the crown on the lifter (to match the cam) and send the lifters to Rocker Arms Unlimited in California (they will regrind the lifters) or ask Cantrell who he recommends.

[markm]

I run the modern version of the 350hp 327 cam in my 56, it is the can in the new 330 and 350 horses GM crate motors. All my street cars have hot OEM grinds. L-82, 425 hp 427, and 30-30 Duntov etc.

[Rick_L]

8:1 compression and a bigger cam is not going to be a happy mix.

[chevynut]

8:1 compression and a bigger cam is not going to be a happy mix.

That's exactly what my first thought was. I have 9.7:1 compression in my 502 and the first thing David Vizard told me to do was bump the compression to at least 10.25:1. I told him I wasn't going to do that. I ended up with a custom grind from Mike Jones.

[markm]

A set of either 64CC heads or flattop pistons would be in order.

[markm]

DESCRIPTION
24502476 CAMSHAFT - HYDRAULIC FLAT TAPPET.
USED IN G.M.'S 350/330 H.P. CRATE ENGINE. THIS CAMSHAFT IS A MODERN VERSION OF THE OLD L79 327 CAMSHAFT. IT'S PROFILE HAS BEEN SLIGHTLY MODIFIED FOR EXTRA LOW END TORQUE AND DRIVEABILITY. THIS IS A NICE ALL AROUND STREET CAM, THAT PRODUCES BOTTOM END POWER AND HAS A NICE SOUND. WORKS VERY WELL WITH VORTEC HEADS. LIFTERS ARE NOT INCLUDED. NOT EMISSIONS LEGAL.
INTAKE LIFT-.435"
EXHAUST LIFT-.460
INTAKE DURATION @ .050"-212
EXHAUST DURATION @ .050"-222
LOBE CENTERLINE- 112.5

After you fixed the CR issue.