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Old 06-07-2008, 07:58 AM
crabdance crabdance is offline
Motorized Bicycle Elite Member
Join Date: May 2008
Posts: 162
Default Re: 2 stroke straight pipe

Originally Posted by MarkTur View Post
In my experience racing rc cars and trucks I learned a bit about tuned pipes. The length of the manifold (the length of pipe between motor and the "can" muffler) makes all the difference in the world. Longer = top end, shorter = low end power.

USUALLY, the designer of a muffler has a typical power range that they're looking to acheive at certain rpm's. A TUNED PIPE is when the length is set for a particular purpose.

So the real question is: what do you want to CHANGE in the performance? That will also help you determine "what" to do. It takes experimenting, and you have to be careful not to cut the pipe too short or lengthen it too long, where you will be moving the powerband to the wrong place.

Personally, I'm quite surprised nobody has really jumped on this to come up with their own brand of pipe...I do know that Dax has one, but I haven't seen it in stock ever.

I also think that if you're looking for a sound change, and perhaps more power, too, that you can remove the baffle from the stock pipe. I've read threads on how to do this before. If you're going to do that, I'd love to hear the results of it. I think that's the quickest and best change you should make because it's not permanant.

I have successfully pulled the baffles out of 2-stroke pipe and gained a performance increase (as well as a sound increase).

Hope that helped!
Hey Mark. That helped a lot! You see, I'm lacking in the basic knowledge of tuned pipes right now and I'm trying to wrap my brain around it all. What you said made a lot of sense. I didn't know about "longer = top end and shorter = low end". That helps a lot.

I had not thought about what I wanted to change when it comes to performance. I guess I would want a pipe that is tuned for cruising speed. That seems to make sense to me. What do you think?

Someone has come up with their own tuned pipe. They have a prototype now and expect to go into production soon. The problem is that they are going to be asking around $280.00 for the pipe! That just sounds like too much to me. Yea it looks neat but I think there is a market for a less expensive pipe. I know I can make one for a lot less. I'm sorta tinkering with the idea of maybe having my own muffler company. I know it would be down the road, but it would be a labor of love and I know from talking to people that there is a market for it if it's reasonably priced.

I get my kit the middle of next week so I might take the baffle out of it then. If so I will be sure and let you know how it turns out. Since you said that you have done it... can you tell me what's involved with taking the baffle out? Thanks.

Thanks for all the great help. It's appreciated.
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