Thread: Advice on engine build

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You're right on the money Firebird. A lopey idle is the sound of a motor being inefficient at lower engine rpm's as a result of the extended intake valve closing point that is necessary to make power at higher rpm levels. It was not ground to operate in a street motor. It was ground to operate at the rpm levels necessary for making horsepower in a race mode. In a street motor, you need to make power from 1000 to 4500 rpm's, not 3500 to 7000 rpms. Using a race cam in a street motor tags you as a poser, a guy who is trying to make others think that he has a race motor in his street machine. A street motor that will operate on pump gasoline needs a modest static compression ratio (9.50:1 limit for iron heads, 10.50:1 limit for aluminum heads) that will support good power without detonation and a cam that matches up with the SCR. And like I said, the old guys who know better will just laugh at you when you come loping through the Sonic Drive In. The only guys who will pay attention are the mutton-headed freshmen who don't know anything anyway.
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