Quote:
Originally Posted by Henry Floored
I think a 3 1/2” piston will help the engine breathe. The more of that combustion chamber that is “active” and the closer to the edge of the cylinder wall is to the intake valve the better it is.
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Remember, air is not "drawn" or "pulled" into the cylinder, it is pushed in by atmospheric pressure (or boost pressure, if supercharged). This distinction must be kept in mind when visualizing air flow through a port. Air has mass (as does the fuel suspended in the air) so therefore has inertia and loses velocity as it makes all those turns through the intake tract and past the valve. So this is a bigger factor than the edge of a cylinder wall being a 1/16" or an 1/8" closer to the valve.