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I know you listed a bunch of variables, but one should that should be note worthy would be altitude as the boost pressure that the engine sees at Pabsolute will difinitely be different at sea level than at 5000 ft per se'. A gage pressure at sea level will read 14psi, but the actual engine pressure Pabsolute would be 14+14.7 = 28.7 psi. At 5000 feet where the Patmospheric is a little more than 2psi less, Pabsolute would be 14+12.7 = 26.7. So in theory my gage pressure could read 16 psi and the engine should be able to safely run at that pressure if it were tuned for 14 psi at seal level. Just a thought.
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