Exhaust sound

[frozenveinz]

Is there any way to make a two stroke have an exhaust that doesn't sound like the offspring of a chainsaw and a hive of bumblebees? Maybe like, put put put? Not YEAANNNN YEAANNNN YEAANNNN?

[2door]

Not much. The laws of physics will only let you do just so much to change the sound of a single cylinder 2 stroke engine. Expansion chambers, megaphones, even motorcycle type mufflers are still going to have that characteristic sound. A longer pipe will soften the crack and ring-a-ding noise but because of the inherent high RPMs you'll still know it's a 2 stroker.
Tom

[frozenveinz]

I see. But does that mean a two stroke at 5k rpm sounds like a four at 10k? Or does the valved exhaust of a four produce a different sound?

[2door]

That's probably not a bad comparison except 10K for a normal 4 stroke would be really pushing it.
The fact that you have twice the number of compression/power strokes with a 2 cycle verses a 4 explains the sound difference. Your 5K to 10K concept is valid.

There is a difference in the restrictions of the exhaust path with valves (4 stroke) as opposed to an open exhaust port (2 stroke) and it undoubtedly accounts for some difference in the noise they make.

Tom