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Old 02-11-2015, 07:42 PM   #4 (permalink)
kYLEMtnCRUZr
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Join Date: Jul 2012
Location: Auburn/Felton CA
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I hear ya there, but a lot of roads around here are 35mph. Of course 125 is ideal but with 43mpg to be had, I just had to ask.

I know Craig Vetter had mentioned the sweet spot being 125-175cc and that even the dimensions of the piston and surface area play a big part in efficiency. Just can't find any specifics. Maybe that info is reserved for his book. But then there are some college classes building hyper milling vehicles using 50cc engines so who knows.

Craig's focus from what I've seen is 65mph. If its under that then he does not care from what I have noticed. That's fine for most people, but I have little straight shot freeway commuting to do. If Craig lived on a small island of 35mph roads, perhaps his sweet spot would be 50-125cc?
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