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Message: [QUOTE="B585Ford, post: 469030, member: 5497"] I can say with 99.99% certainty that H&S does subtract out the barometric pressure (usually around 14.7 or so). I assume the tables are true readings also. You are correct, depending on a few factors (mostly what gear/rpm), I am in the 50s on boost when I see the high 60s so it does maintain close to 1:1, but wouldn't I be risking floating the valve if I go above 70? BTW thanks for the input on retarding the timing....that makes me feel a lot more comfortable. [/QUOTE]

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