Reply to "cam and compression recommendations"

bosswrenchMember

FWIW, I agree with Doug's post: 9-1/2 to 10:1 max. Aluminum closed-chamber heads will often allow a half-point higher than iron heads due to better heat-transfer which minimizes pinging. A performance cam will stretch this a bit further at the cost of reduced mileage.

Example: our iron block/alloy head 351-C uses a mild SVO hydraulic cam & 10-1/2:1 CR, and unless I get frisky with the accelerator at low rpms, the 87 octane tractor fuel they sell as "gas" these days does NOT ping. On long trips with a tuner-Holley, we get 20 mpg at 90+ mph. I built this motor in 1991 and it has not had a sedate life....

4/4/132:25 PM

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