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Two simple rules: You manage fuel for reliability, you manage timing for power.
On a 10.5:1 engine, I recommend starting at 6psi and installing a AFR gauge, for 8-10psi water or methanol injection is your savior.
Lots of guys running 10.5:1 on forced induction 16V twin cam motors. I just finished building a 9.5:1 16V engine that will see over 20psi on a daily driven car.
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Ole Skool - wouldn't have it any other way
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