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I am running 14PSI at 5000 ft. This is with a wide fire headgasket that I installed last year.
Depending on the wastagate and controller, and engine management you can get 20 our of the stock motor. I think Wolfpri, and Grommit may have been running more on their "monster 951." Check the archives.
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2021 Model Y
2005 Cayenne Turbo
2012 Panamera 4S
1980 911 SC
1999 996 Cab
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