Pipe Building
 

Anyone here have any experiance with building 2 stroke pipes? I needed a metal work project for school so i decided a pipe would be a challenge. It so far has proven to be very hard. Instead of your average pipe i have made mine out of 16 Gauge steel. I am also making a series of small ringes instead of peices of shaped sheet metal. So far i am just a little into the begining of the header.

If anyone has any advice that would be great. THANKS!!!

A two stroke pipe is a pretty advanced metal working project. This book will help - a lot.
http://www.fournierenterprises.com/c...4&cat=1&page=1

Give this a try: http://www.buildandclick.com/

Personally, I think a better project for a metal working class would be a pipe cage that bolts to the frame.

Good luck!

that sounds good.

Yup, cool idea there Speedy

I wa thinking about a cage but it would look bad and collect lots of trail debrie. Thats 2 stroke pipe building program looks sweet.

But i found out today i can not wled very thin metal on our mig very well. I might try to braze it together.

I wounder if it would be easier to build the pipe stright and then bend it?

You might want to get in touch with Steve @ MotoWest he can point you in the right direction.

You're on right track with the small rings, that's called a cone pipe. That's all we had back in day and that's how the best pipes are still made today.

Back then, long before there were published formulas it was all trial and error. I remember watching Daryl Bassani and Donnie Emler beating and banging and sweating over pipes seemingly forever, always trying to make them better.

Now the easy way is to start with an existing pipe and just keep modifying it to produce the power you want. The Motowest pipe went into production after about three days of testing and only 2 prototypes being built. Once you have a working prototype you then use it to make the stamping dies and jigs to go into production with.

Today the specs have become so standardized... Be it mx or enduro or road racing, for any engine size and intended usage there's about 2 or 3 standard set of pipe measurements to choose from. Just twist and turn those measurements around and through the motorcycle of your choice and you have an exhaust system.

Although the science of 2-stroke exhaust design still lives on, the art of 2-stroke exhaust design has been all but lost. It's a bit of a shame really.

Steve,

Since were on the subject of 2 stroke pipes, I have a question for you. What is gained by shorting the head pipe, from the exhaust flange to first bend? What type of gain if any would one expect? Lowend, midrange or topend increase?

Thanks