Consistency is good, but my stock compression motor makes 155-160 across the board. A friends LT1 shows 180 psi and they are 10.25 to 1.
Maybe you might want to try a leakdown?
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1988 Mustang GT
stock bottom 302, C4
10.9 @ 128 with 8 psi of Novi 1000 boost!----STOLEN
1989 Mustang notchback
Warmed up 306 with a Procharger.
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