Engine build on the brain

abodyjim said

If I use a fel pro 1008 head gasket .039/4.18 I get a compression of 11.38. Recalculate for 108 install and I get a dynamic of 8.71 and cranking pressure of 177 if I'm doing it right. This is where I'm getting confused, these numbers are high for what's considered safe if I understand it right. What kind of numbers should I be looking for to meet my goal and intended use

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With those numbers you are about right where I'm at on pump gas.

Just make sure you do the little things...like using an intake without a heat crossover (I think you are using EFI and if it's port EFI I still would not heat the air in the intake) get your timing curve in shape and get your cooling system where you can maintain ~170 degree coolant temp (can be 160ish if you done need a heater but I need one so I keep mine at 170) and get the correct heat range plug and you'll be golden.

I've been ignoring all those numbers for decades. Guys just waste power not getting the CR up where it should be.