Quote:
Originally Posted by 94cobra69ss396
My original plan for the current 454 in the Chevelle was going to be 11:1 as well but then I found cracks in the heads (128cc) and bought the Edelbrock Performer RPMs which have a smaller combustion chamber (118cc). The compression is just above 12:1. My next engine build either another 454 or a 496 is going to have 9:1 and a Procharger. That way I can run 91 and a conservitive tune and then when I take it to the track run race gas and more timing. That's the way my Cobra is.
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496 is the way to go. That was the spec used in Cam Am racing way back when. That small change in ci REALLY wakes the BB 454 up. I've been working on roller cam specs for a couple of guys. The figures I've been getting are just out standing. Think 600 ftlbs at 2000 rpms.
