03-25-2022, 06:21 AM
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CC Member
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Join Date: Apr 2009
Location: Little Rock area,
AR
Cobra Make, Engine: ERA Street Roadster #782 with 459 cu in FE KC engine, toploader, 3.31
Posts: 4,533
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Not Ranked
The 15 - 16” vacuum and 550 hp from a 428 sounds a bit inconsistent to me, but maybe if you have a good roller lifter cam. Should still pull past 4500 rpm and far more. It’s hard to beat a vacuum operated secondaries 750 for responsive street use. The engine gets the air flow it demands and no more.
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