05-18-2009, 05:44 PM
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Half-Ass Member
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Join Date: Jun 2005
Cobra Make, Engine: ERA #732, 428FE (447 CID), TKO600, Solid Flat Tappet Cam, Tons of Aluminum
Posts: 22,025
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Not Ranked
Quote:
Originally Posted by ERA Chas
Because it was originally shimmed to 100PSI by the machinist. I changed that fast while on the dyno. Would still prefer 65PSI but this is within a good margin.
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Maybe it's right on the money and your gauge is off a little bit. I wouldn't waste any worries on it though. But just in case anybody ever asks you can tell them that Ford's NASCAR engine blueprinting specs for 1967 called for the relief valve to start opening at 50 to 65 PSI. |
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