[email protected] Posted February 20, 2006 Report Posted February 20, 2006 i dont think so my drag pipes dont got silencers but hell , its so loud lol i wish i had silencers some times Quote
Fastrat Posted February 20, 2006 Report Posted February 20, 2006 It shouldn't affect the bike to any noticable degree. All the backpressure required is made in the head pipe and that's the part that is tuned. The silencer is there to quiet the bike, though it will affect performance if the packing is worn out. Quote
korndawg Posted February 20, 2006 Report Posted February 20, 2006 If you're pipes aren't designed to be ran without silencers, then I would guess that you will probably lose quite a bit of bottom end. Quote
fastbanshee8 Posted February 20, 2006 Report Posted February 20, 2006 You will loose a lot on the bottom end. Been there, done that, but I only rode it around the house one time, and it sucked. No bottom end, and it wouldn't rev up, like it did with the silencers. Quote
Ducman Posted February 20, 2006 Report Posted February 20, 2006 Dammage - bike no, ear drums yes. Quote
2003LimitedBanshee Posted February 20, 2006 Report Posted February 20, 2006 It shouldn't affect the bike to any noticable degree. All the backpressure required is made in the head pipe and that's the part that is tuned. The silencer is there to quiet the bike, though it will affect performance if the packing is worn out. 476139[/snapback] If the packing is "worn out" (burnt up) it is closer to no silencer than with a fresh pack. So why would you expect it wouldn't affect it without silencers, but silencers with less pack needing a repack would affect it to a noticeable amount. I would guess that you might gain a bit on the top (very small) and lose some on the bottom, plus definitely increase your chances of drawing the wrong kind of attention. Like loco said, why? Quote
Fastrat Posted February 20, 2006 Report Posted February 20, 2006 If the packing is "worn out" (burnt up) it is closer to no silencer than with a fresh pack. So why would you expect it wouldn't affect it without silencers, but silencers with less pack needing a repack would affect it to a noticeable amount. I would guess that you might gain a bit on the top (very small) and lose some on the bottom, plus definitely increase your chances of drawing the wrong kind of attention. Like loco said, why? 476195[/snapback] Not true, if the packing is burnt up, the exhaust gases will not have a smooth flow through the silencer. Look in the end, or repack one yourself. It's just a tube with holes drilled into it. The sound waves bounce around in the exhaust and get absorbed by the packing. If the packing is not burnt out, the gas will flow smoothly even as the sound is absorbed. If there are spaces the gas can get into and bounce around then the flow is more turbulent, it will not flow as much. That being said, exhaust not flowing as much air, engine not flowing as much air. That's why repacking a blown out silencer actually makes a difference in power. The only part of a pipe that is tuned is in the head pipe, the big fat part also known as the expansion chamber. The backpressure and exhaust resonance reflecting off that expansion chamber helps the engine move air. After the expansion chamber's outlet there is very little consequence on the exhaust characteristics. That is why different pipes have different size/length epansion chambers, after the outlet, though, they all use a pretty basic silencer. The gain on top and loss on bottom should be undetectable to anything but a dyno. I suggest anyone really interested in this look around on the internet for a book called "2 stroke tuner's handbook". The length and size of a straight pipe does, however, make a differnce in a four stroke. The four-pokes use valves and an extra cycle in the engine to move the air. Suck, squeeze, bang, blow. 2-strokes are suck/squeeze, bang/blow, gotta love em'. All this being said, I don't recommend removing your silencer. If for nothing more than just sound reasons alone. Quote
thegroup Posted February 20, 2006 Report Posted February 20, 2006 suck/squeeze, bang/blow,476227[/snapback] Quote
banshee tuner Posted February 20, 2006 Report Posted February 20, 2006 Mine will not crank without silencers. Quote
2003LimitedBanshee Posted February 20, 2006 Report Posted February 20, 2006 Not true, if the packing is burnt up, the exhaust gases will not have a smooth flow through the silencer. Look in the end, or repack one yourself. It's just a tube with holes drilled into it. The sound waves bounce around in the exhaust and get absorbed by the packing. If the packing is not burnt out, the gas will flow smoothly even as the sound is absorbed. If there are spaces the gas can get into and bounce around then the flow is more turbulent, it will not flow as much. That being said, exhaust not flowing as much air, engine not flowing as much air. That's why repacking a blown out silencer actually makes a difference in power. The only part of a pipe that is tuned is in the head pipe, the big fat part also known as the expansion chamber. The backpressure and exhaust resonance reflecting off that expansion chamber helps the engine move air. After the expansion chamber's outlet there is very little consequence on the exhaust characteristics. That is why different pipes have different size/length epansion chambers, after the outlet, though, they all use a pretty basic silencer. The gain on top and loss on bottom should be undetectable to anything but a dyno. 476227[/snapback] To give you some credit I hadn't thought about the flow characteristics with burnt up packing. However, I hope the rest of the two-cycle theory/operation wasn't for my benefit. Also, I do all my own wrenching so I have repacked silencers many a time. Notice that I said it would make a very small difference (read almost/if not undetectable). Quote
Fastrat Posted February 20, 2006 Report Posted February 20, 2006 (edited) The response was to explain to RM why it didn't matter, and to explain the flow characteristic of a burnt out silencer. No offense meant, not trying to start some kind of stupid debate when we agree there's no reason to run without them. Bansheetuner, is it a possibility that you tuned/jetted your bike for burnt out silencers? Edited February 20, 2006 by Fastrat Quote
2003LimitedBanshee Posted February 20, 2006 Report Posted February 20, 2006 The response was to explain to RM why it didn't matter, and to explain the flow characteristic of a burnt out silencer. No offense meant, not trying to start some kind of stupid debate when we agree there's no reason to run without them. Bansheetuner, is it a possibility that you tuned/jetted your bike for burnt out silencers? 476343[/snapback] Cool, and we definitely agree there is no logical reason to run without them. Quote
Fastrat Posted February 20, 2006 Report Posted February 20, 2006 I agree with that, I would rather repack, than take em off. Quote
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