DIY Muffler/exhaust help
- Thread starter IKE323
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mckutzy
Well-known member
What s the motor? 2-4 stroke? For on or off road use?
Past that, there is a bunch of youtube but more info is needed.
Past that, there is a bunch of youtube but more info is needed.
2 stroke and can be for offroad
mckutzy
Well-known member
Whats the motor? Does it have an exhaust already, or compleatly new exhaust is needed.
An old one could be copied or fixed.
2 strokes need a tune pipe, Im not sure, but I sorta know it needs to be made in a specific manner.
An old one could be copied or fixed.
2 strokes need a tune pipe, Im not sure, but I sorta know it needs to be made in a specific manner.
Doc Sprocket
*********
In order to properly design a tuned pipe for such an engine requires some really freaky mathematics. Designed wrong, it won't help at all, and might even hurt performance.
A two-stroke does not require a tuned pipe. We've got a well-respected member here that has gotten more out of a 2-stroke mower engine than any of us might have expected- and he's doing just fine with a simple megaphone-type open pipe.
A two-stroke does not require a tuned pipe. We've got a well-respected member here that has gotten more out of a 2-stroke mower engine than any of us might have expected- and he's doing just fine with a simple megaphone-type open pipe.
Everytime I think of running no "exhaust" I think of this...
http://www.youtube.com/watch?v=FX72lcbozBs
http://www.youtube.com/watch?v=FX72lcbozBs
it has a an exhaust but i need like a new one or else the factory exhaust will hit the back wheels( and i want to keep it in case i am going to put the motor back in the quad it came from)
Umm it is a 2 stroke, are you saying that i do not need to tune it and can but in like a bend or two in my exhaust?
There's an exhaust calculator to properly design the stages if you have the all the engine info it needs.
I attached it just in case you want to give it a try
'sid
PS if you google for "exhaust calculator" you may find some more info on that, the original website seems to be offline I'm afraid
I attached it just in case you want to give it a try
'sid
PS if you google for "exhaust calculator" you may find some more info on that, the original website seems to be offline I'm afraid
firemanjim
Just kartin' around....
Man, its really simple. I would mark the area(s) you want to bend and take a good mental picture. Now, there is 2 ways I tackle such a job,1st torch and box wrench(easier) 2nd just a box wrench and cheat pipe. ON BOTH methods, i fill the pipe with play sand! Pack it tight! Very important. .... Method 2, with pipe packed with sand(tape up ends to keep sand inside) at the first mark, put your box end wrench with the open end above the directly over the directionyou want to go. UUsing cheater pipe,start your bend a little. Move your wrench over a little at a time and bend a little at a time. DO NOT RUSH and you can get a nice bend and pretty tight too if its not too big in diameter. The wrench will leave little marks on the pipe but you can file or grind smooth fairly easy. It is easier to heat it up with a torch, but YOU CAN DO MORE DAMGE THAN GOOD if you heat it too much. I have a BIG 1&5/8 wrench i "custom" ground for the torch method. I do not suggest you try it, its merely what i do.... Even without a torch, you can do a decent bend.
You could also buy another used stock exhaust and do a custom cut and weld job. That way you still have a stocker for the quad. If your exhaust has an expansion chamber(big funny shaped bubble part), you're gonna NOT mess with anything before it. AFTER it drops back to the small diameter pipe, its KINDA free game as long as you dont get too wild with it...
Hope that helps....Ummm so its clear.... The pipe has to be able to go through the box end of the wrench. And as you bend, the wrench slides over the top and stays put at the bottom. Making small side steps, is how you keep a tight bend.... be patient and find a practice piece of pipe....
You could also buy another used stock exhaust and do a custom cut and weld job. That way you still have a stocker for the quad. If your exhaust has an expansion chamber(big funny shaped bubble part), you're gonna NOT mess with anything before it. AFTER it drops back to the small diameter pipe, its KINDA free game as long as you dont get too wild with it...
Hope that helps....Ummm so its clear.... The pipe has to be able to go through the box end of the wrench. And as you bend, the wrench slides over the top and stays put at the bottom. Making small side steps, is how you keep a tight bend.... be patient and find a practice piece of pipe....Now that is what i call help, so will the pipe say around the same diameter and not be crushed when i bend it?Man, its really simple. I would mark the area(s) you want to bend and take a good mental picture. Now, there is 2 ways I tackle such a job,1st torch and box wrench(easier) 2nd just a box wrench and cheat pipe. ON BOTH methods, i fill the pipe with play sand! Pack it tight! Very important. .... Method 2, with pipe packed with sand(tape up ends to keep sand inside) at the first mark, put your box end wrench with the open end above the directly over the directionyou want to go. UUsing cheater pipe,start your bend a little. Move your wrench over a little at a time and bend a little at a time. DO NOT RUSH and you can get a nice bend and pretty tight too if its not too big in diameter. The wrench will leave little marks on the pipe but you can file or grind smooth fairly easy. It is easier to heat it up with a torch, but YOU CAN DO MORE DAMGE THAN GOOD if you heat it too much. I have a BIG 1&5/8 wrench i "custom" ground for the torch method. I do not suggest you try it, its merely what i do.... Even without a torch, you can do a decent bend.
You could also buy another used stock exhaust and do a custom cut and weld job. That way you still have a stocker for the quad. If your exhaust has an expansion chamber(big funny shaped bubble part), you're gonna NOT mess with anything before it. AFTER it drops back to the small diameter pipe, its KINDA free game as long as you dont get too wild with it...
o yes what is cheat pipe by the way?
firemanjim
Just kartin' around....
Yes , if youre patient, go slow and make little bends at a time,the pipe will not crush. The sand packed inside will help keep it all round. If you get in a hurry, you WILL dimple or crease/crush the pipe wall. A cheater pipe is just something used to add leverage to the end of the wrench. This makes it easier to be more in control of how much you bend at a time.
ok because at school we have a pipe roller (but it does not have the guides for the pipe its justknurled)
and we have one of these (so can the sand method work as well )
firemanjim
Just kartin' around....
**** bro, you didnt say you had a bender! Yes, pack with sand, bend it using the bender. Being that is already an exhuast system, you might have difficulties in positioning....
The sand trick has been around for years.
The sand trick has been around for years.
i was thinking about taping the ends up, wouldnt it be better to weld the ends closed and cut the pipe longer to create an easier bend without the sand falling out
firemanjim
Just kartin' around....
Well, if you are using the stock part,welding to it to make it longer wont help.with positioning. Because you have pre bent pipe , in an exact shape, it might be hard to move it around to bend the endyou're working on. Maybe not.... just try it..... And NO DO NOT WELD the ends closed. Just duct tape it real good. The sand wont come out..... thats what I have always done....
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