Home-built expansion chamber?

[Nikko]

I'm putting a Husky 2100 on an Alaskan mill and previous experience with a Husky 285 on this same mill tells me I'll be sucking 2-stroke smoke for the entire day. I'd rather not do this.

I'd like to divert the exhaust, but am concerned about simply adding length to the pipe without adding an expansion chamber to make up for it.

Has anyone ever done this?

Nikko

[limbrat]

What if you just set up a fan or squirrel cage blower to blow the fumes away from you? Could help to keep you cool too.

[Kevin]

This has been done, you could check with Walkers.

[Nikko]

Walker's on the "to call" list, but I'd like to learn a bit more about it before I do that. I'm just curious if anyone out there has experimented to the point of being able to say "oh sure - grab an expansion chamber off a 1992 Yamaha YZ100, do this and that to it and Bob's your Uncle".

Nikko

[weimedog]

Why not do something in that direction?

My bet is a company like "Dynaport" up in NYS who has build chambers for years and years for everything from motorcycles to snowmobiles would be a place to start to have one built.

If it was me trying to "hack" a expansion chamber from another application, I would try and start with an FMF "Fatty" from any bike of any year with similar displacement to your husky. Maybe a KX100. Those were the "midrange and up" pipes but would be most likely to compromise the difference between the two applications with different port timing, carb size, intake volume differences, crank case & reed valve differences etc. to get you an actual gain. Remember also many of the motorcycles are case reed induction designs with power valves in the exaust ports...so may have completely difference volumes and therefor characteristics relative to expansion chambers..

Also the first section of the chamber would be an issue as you would need to build one with the same volume and taper to get what that pipe was designed to do. I doubt it would be easy to graft a "curved" motorcycle pipe to your application where you may need the pipe  to exit at a different direction and make the connection to the cylinder barrel. Most motorcycles have a slip fit with springs as compared to the bolt on muffler arraingement most saws have.