Thread: Bicycle Engine
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Old 07-22-2013, 12:06 AM
bigbutterbean bigbutterbean is offline
Join Date: Jan 2011
Location: Lebanon, PA
Posts: 2,420
Default Re: Bicycle Engine

The power curve on a 2 stroke can be predicted. Its a little complicated, but basically just boils down to math and geometry. There are probably even computer programs that can help you. With a certain size cylinder, certain size combustion chamber, certain amount of compression, certain header length and certain volume and shape expansion chamber with certain amount of cones and a certain air-fuel mix, jetting, gearing, reeds, etc, you will get x amount of horsepower or torque at x rpms at x gear ratio. Two strokes are just as predictable when you understand how they actually work. And even if you don't know the math or geometry, it only takes a few rides to get used to the powerband, then it becomes predictable. Install a tach and you'll know EXACTLY what your peak rpm's are. Sorry, but there is nothing mystical about a 2 stroke's powerband.
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