expansion exhaust design

[holty]

hi folks,
some of you might have seen my rotax 290 build thread, its nowhere near done yet, but im thinking about the exhaust already, its good to plan ahead isnt it, i did buy a nos expansion off a 300cc crosser with the intention of cutting it up and fitting it on to my rotax conversion,but as we all know exhausts are so important on a 2 stroke, and i dont want to spoil the conversion with a duff exhaust so i was thinking about building my own. has anyone used the 2 stroke wizard tuned pipe expansion software, was it easy to use, and did the pipe work well when finished, or did you use something else,
thanks in advance,
holty

[garry inglis]

holty you might want to try Mick Abby tuner he builds one off exauhsts he's in Stockton now I have his number even just for a chat and I would think rich tailor will have worked out an exauhst to fit his rotax kit or at least the tuned length required

[RManson]

I've used the software and the results that came out were mighty close to the pipe that I used, so I aborted the thought of fabricating a new pipe. Turns out the MX manufacturers know what they're doing...

[Rsport220]

There can`t be too many people who build their own exhaust so I`d say give it a go, it would be great to see a picture story (like the rotax 290) as it progresses. There is something special about a well made 2 stroke exhaust, it`s like sheet metal artwork. Have you got a link for the program, the reason I ask is that I`ve fabricated a few exhausts over the years, some of them even worked lol.

[Rsport220]

and to help with the cone patterns I use the program on www.conelayout.com