Hi Jeff,
Thanks for interacting!!!
You have probably noticed this theorical single is 1/2 of a Sportster engine... So the 9 to 1 CR would be achieved with std high dome pistons, while the 5 to 1 CR could be achieved by the simple expedient of a flat or slightly reversed dome piston as in some diesels. Not to mention the loss of the dome which is an impediment, both in NA or supercharged set up. It is most likely as well that the lower the static CR, the less advance would be required to burn the contents...
Yes, I can do new calcs to show average Bonneville elevation and heat, but that's not what I'm aiming out!!!
I'm just trying to find, ""all other things being equal"", where is the sweet point, ie the most efficient static CR versus the loss of fill that the higher CR induces in the equation. (at this stage, not too worried about variations in temp, pressure or other external interference that can be assumed to be the same irrespective of where the CR is, on this charged engine)
Patrick