Thanks Mike. I think it's all about how much air/fuel mix you can get into the cylinder at the bottom of each stroke. Maybe I'm missing something about 2 strokes, because you are trying to compress that mixture in the crankcase to force it into the cylinder, so maybe building compression (less area) in the crankcase does more than increased compression in the cylinder. Does it help? I raced small-block chevs for years. I ran a 14 to 1 compression and shifted at 10,000 RPM. Every little thing helps. so when I see a low compression motor I want to change it. Old habits ya know. I would love to what I would call valve timing, raising the port height to open them sooner, but I'm afraid I'm already over my head. I don't want a monster that won't idle, or run slow in a "no wake" zone (we have a lot of those). Here's my "non race" Mopar. We take the boats to car shows with it.
Jerry
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