Checking deck height

coloradohill said

I will measure again tomorrow center of piston when I get a chance and post the findings.
I am using closed chamber aluminum heads and would like to keep compression to the upper limits due to the power loss at altitude.
I’ve been told to add 1 point for aluminum and .5-1.0 static for 5000 ft. For pump gas.
does that sound reasonable to you?
Thanks again

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If you have closed chamber heads, put the pistons in a piston Vice and knock the quench pad off of it. Run them at zero deck and a .040 gasket and be done with it.

I won’t make a CR recommendation because I run way more CR on pump gas than most do. IMO at you elevation 12:1 would be where I’d start.

That is not a recommendation, it’s my opinion and those two things are not the same.