Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - '76 sbc build , need more head advice
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Old 02-26-2008, 10:18 AM
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"it's not running as strong as I hoped"

You may not have enough static compression ratio to run even that relatively mild cam. The cam calls for a s.c.r. of 8:1 to 9.5:1, with good middle ground being 8.75:1 to 9.00:1 and I'll bet your motor is lower than that. The advanced intake closing point of the cam over the stock one is bleeding off too much compression, resulting in low cylinder pressure. Have you done a compression test on the motor? If not, warm the motor, pull all the plugs, disconnect the coil, wire the throttle blades wide open and test each cylinder through four or five revolutions (until the gauge won't climb any higher). Then report back here.
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