E8 - HOW TO: Portmaps, Port Durations, And Port Angles. 2STROKE STUFFING
Tutorial: How to make portmaps, find port duration, port corner radius, port flow width, and port height,
Here's a great tool for converting piston travel in mm to degrees of crankshaft rotation:
http://www.dansmc.com/mc_software2.htm
Thanks for watching!