Jay1823
New member
ok first off i'm a complete 2 stroke novice. I'm a car guy, i've built turbo cars and what not for years but i have zero experience in 2 strokes. So basically this is what i have. I've got a single person dune buggy that i put a 440 Exciter engine in from a 1980 sled. From what i've read these are great little motors and so far i agree, pretty good power and pretty reliable. Well my buggy used to have a solid axle in the rear but i got tired of the horrible performance so a fabbed up a double a-arm rear suspension. Now my stock exhaust will get in the way of the suspension travel so it's got to go. Now i do know from doing some reading that modifying your exhaust can have some pretty bad affects if done improperly. What i'm looking for is some knowledge on how to go about designing a custom exhaust for this engine. Should i be using a certain size pipe for a certain c.c. engine? Are there certain lengths i should obtain? Certain shapes, yadda yadda yadda. Sorry about all of the questions, i'm kinda of a perfectionist, i like things to be done correctly not half assed. Any info would be greatly appreciated. Thanks Jay
SpartaSXr
Member
Pipe
Modify the pipe to fit your application. Try to keep the ( Expansion chamber the same length ) are you saying cut and roll the pipe upward or completly changing the direction of flow ? Most pipe manufactures run testing for flow out of the pipe. They have come up with some weird looking profiles over the years. You may be better off looking at pipes for a Banshee which are twin two stroke's and resemble a twin pipe design. Where you will find a difference is the motor will tend to pull hard somewhere in the torque curve. That point will change with length of the pipe and how far away from the motor the expansion chamber is from the motor. Had a guy put a Honda 750 4 in a buggy. Had a ball till he crashed. Good luck !
Modify the pipe to fit your application. Try to keep the ( Expansion chamber the same length ) are you saying cut and roll the pipe upward or completly changing the direction of flow ? Most pipe manufactures run testing for flow out of the pipe. They have come up with some weird looking profiles over the years. You may be better off looking at pipes for a Banshee which are twin two stroke's and resemble a twin pipe design. Where you will find a difference is the motor will tend to pull hard somewhere in the torque curve. That point will change with length of the pipe and how far away from the motor the expansion chamber is from the motor. Had a guy put a Honda 750 4 in a buggy. Had a ball till he crashed. Good luck !
horkn
New member
I agree with sparta.
cut the pipe witha bandsaw, then rotate the pieces to fit your new suspension. Tack weld each part to make sure the pipe fits when installed in the chassis. Start at the inlet of the pipe, and go toward the outlet of the pipe, rotating and tack welding as you go. then weld it all back together.
That way you will keep the stock pipe specs, but gain clearance where you need it.
Good luck!
You will probably need to make a couple of cuts in the pipe to accomplish this.
yeah, I made a suzuki gs1000 4 cylinder buggy with full front and rear IRS double wishbone Susp quite a few years ago. the 4 stroke motors are a lot more forgiving about pipes than the 2 strokes since 2 strokes scavenge the unburnt exhaust and 4 strokes do not.
It was fun, but really dangerous.
cut the pipe witha bandsaw, then rotate the pieces to fit your new suspension. Tack weld each part to make sure the pipe fits when installed in the chassis. Start at the inlet of the pipe, and go toward the outlet of the pipe, rotating and tack welding as you go. then weld it all back together.
That way you will keep the stock pipe specs, but gain clearance where you need it.
Good luck!
You will probably need to make a couple of cuts in the pipe to accomplish this.
yeah, I made a suzuki gs1000 4 cylinder buggy with full front and rear IRS double wishbone Susp quite a few years ago. the 4 stroke motors are a lot more forgiving about pipes than the 2 strokes since 2 strokes scavenge the unburnt exhaust and 4 strokes do not.
It was fun, but really dangerous.
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