| Author | Message | ||
     Not_purple_s2 |
I have 96 S2 that I just just last year. I've started getting strange impulses to change it and make my own. But the down part is I'm in college so I'm usually broke. My S2 has a crusty Supertrapp muffler that is nice, but I want something else. I want something less noticeable. My idea is to make my own muffler from 2.5" or 3" exhaust tubing, weld a internal baffle in it and paint it high temp black (or I could use SS tubing and polish it  ). I have a welder, a pipe bender and plenty of pipe, so I would only need the baffle. I've built exhaust systems for cars but I've never worked on motorcycle pipes before. I have it planned out in my head and it seems straight forward enough. What do you guys think? Am I crazy? Any suggestions on the kind of baffle I should use? I had thought of running it straight, but I think it would actually hurt the power if I eliminated all the back pressure. | ||
| Blake |
By itself, eliminating exhaust "back pressure" via a less restrictive exhaust tract will not hurt power output. Changing the geometry and thus the pressure wave behavior/characteristics of your exhaust tract can hurt power. Have you considered simply adapting a cheap automotive glass pack muffler to your S2? Most performance exhaust baffles are simply perforated tubes wrapped with some sort of rugged acoustically absorbent material. | ||
| Not_purple_s2 |
If I were to keep the ID of the baffle equal to the ID of the header outlet then the geometry of the system shouldn't be effected too much or would it? | ||
| Blake |
That is what you'll find in most mufflers; the baffle does in effect enlarge that section of the exhaust tract. It can actually help smooth your powerband (torque curve) if optimally configured. | ||
| Fullpower |
i ran a 2-1/4" ID thrush glass pack on sportster. ok up to 4500 rpm, then it really muzzled it. would not make power up high. so i hogged all the stuffing, and the perf core out. now it is just a big open chamber. it runs real well, makes good power up to 6800 rpm. using a 2into 1 header scavenged from vance +hines pro- pipe set. the big open can does attenuate sound pretty well. it is Much quieter than drag pipes, and runs pretty well. a little reversion/ rich mixture zone around 2800 rpm, but compensated by running a bigger air bleed to lean out lower midrange. best part: it cost $24 |
