Not Ranked
Pat Kelly’s program calculates mine at 8.4 (slightly over) DCR (10.6 Static) Its an iron head 390 and it is very touchy about timing, but does run on pump premium with a fairly slow curve in the dist and 36 degrees total.
I was hoping for a bit lower compression, but that is how the numbers worked out.
I hear that the KB piston calculator comes up with different numbers though, so be careful comparing numbers if they are not all calculated on the same basis.
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