Un-stroked vs Stroked Displacement vs. Crank Angle, etc.

Yes, I am pretty aware of most/all that, but glad you brought it up. I really just wanted to see 2 things when I did this:

• Max piston speed vs RPM so I could stay under the recommended max's for this stroker design
• Look at the difference in angles at which the peak speed occurred in relation to info as to cam timing of some different engines and rod length (SBM vs SBC)...to see if I could see why from this data.

Yes, flow rate really does not track piston velocity (unless it is at very, very low RPM's or cranking.) Buuut, that does bring up one thing..... there is a real difference in how the flow works between low RPM's and high RPM's.... explains why having a lot of overlap helps at the high speeds for the exhaust 'pulling' the intake in, to overcome that pesky mass that the fuel-air mixture has... but hurts at low RPM with reversion, which is the undesirable side effect of overlap. Compression ratio comes in more at the low RPM's in how well the cylinders are cleared and re-filled, where IMHO the flow moves (relatively) closer to the simple (static) model of piston position.

I'm gonna have to find your reference and read that, which I suspect accounts for the lo/hi RPM flow differences; I am sure I will learn. Many thanks for that!