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Way too high. You need to calculate the compression ratio based on head volume, dome volume, etc. Stock compression is around 140 psi. 180 psi is around 12:1. Run the test with the throttle plates open.
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'18 Macan S - my turbo Porsche
previous Pcars
'58 356A coupe, '00 Boxster S;'95 993 Polar Silver/Chestnut;'08 Cayman S;'70 911E
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