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I run a MFI 2.7 RS replica motor in my race car. It is exact including 8.5 compression ratio. I shift at 7300 RPM because I hit the rev limit not because it's not pulling. I wish I could take it to 7500 plus but I don't have race valve springs and I want the engine to last awhile.
Something is wrong with your engine.
-Andy
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72 Carrera RS replica, Spec 911 racer
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