Thread: head upgrade disappointment

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aluminum to steel doesn't make any difference on CR, chamber size is the only part of the head that is in the CR equation.

Chamber size and CR are good, the runner volume @210 is more for an all out race engine with a roller cam, and lift in the .600+ range and a lot more duration.... Unfortunately a cam like this is a PITA trying to run on the street in a sbc. Fuel mileage is terrible!

I'm not a real cam guru, I leave that to others.... I believe there is a way to fool (somewhat) the runners by having different cam opening and closing points, but I'll leave that and cam specs up to others... For sure long tube headers will help, with that big of a volume of air coming in, it has to be able to get out.

One other thing, with 5th gear being an overdrive, you could also get away with like a 3.70 gear, and not hurt your cruising mileage or RPM too bad.....

IMO, it would be ideal to sell these heads, then get a pair with 180 runners which would be a lot more "comfortable" and work a lot better on a street engine.