2 stroke straight pipe

I'm new at all of this and I need to know if a straight pipe will hurt my 2 stroke engine? Are there things I have to watch out for or things I have to take into consideration? One of the reasons I wanted to try a straight pipe is the sound. I would like a lower throaty sound that I think a straight pipe would give. Can someone please shed some light on this subject. Are there good points and bad points?

thanks in advance

What do you mean by a straight pipe? Just a lenght of pipe the same size the length of the run, with no "can" or muffler? On a two stroke engine your performance would suffer, there needs to be backpressure. On a four stoke it might not affect performance as much.

Hi misteright.... yea I was just talking about a length of pipe. Thanks for letting me know that performance would suffer. The reason that I'm wondering about all of this is that my next door neighbor is a great welder and said that he would make me one if we could come up with something to make. Can you point me in a direction? I need to know how to make a muffler!

I figure we can come up with a prototype and share it with a few friends and see how they like it and get some feedback. We just might have us the beginnings of a small muffler company lol...

I appreciate your input and help. And anyone else's too!

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I've seen some that have made a straight pipe that looks like a motorcycle type pipe and then weld the original muffler on the end of the pipe. I've never heard one though so don't know if it would acheive the sound you are after or not.........................

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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!
Mark

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.

Thanks for the google search man...

Thanks... I will keep this in mind when it comes to trying things out for the first time!

I make my own pipes I don't think they are what you would call true tuned pipe but I've made 4. Two for my bikes and one for Cruiser and one for Ilikeabikea and they didn't complain. I still have the rough patterns if you boys and girls are interested. The metal to use to make these is go to the body shops and ask for the wreaked body panels the shops will give them to you. I made all the pipes out of a dodge hood skin and a oxy/ acet. torch. I have pictures on this forum of my bikes with their pipes.
One week end me and ilikeabikea put on a live video how to on making a pipe on this forum so we showed that the average guy could do it, some of you people saw it quite boring.

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