Overpacking an exhaust?

[HD]

Repacked my exhaust today and now it is a lot quieter. Lost the sound that I liked but at the end of the day it will save my bacon when it comes to the plod.

Reason I am asking if you can overpack as I went to a mates earlier and him and his dad both said to me (on their own) that I may have overpacked it.

There is next to no noise coming out of the exhaust, just engine/airbox noise.

It sounds like a scooter and I hate it

The packing that I bought was too small so we added some of my old packing too it (the best part of it) to bulk it up.

Is that just bullshit or can you really overpack? I would like some noise back...

Cheers!
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Rusty '02 Vito Camper + CBR600F3

[sandman1976]

Overpacking can cause too much back pressure, which, yes can damage your engine or cause performance problems if its too overpacked.
The noise limit is pretty high nowerdays i cant see you having huge problems with the old bill.

[bennell09]

what the above said about the back pressure, if i was you ild just remove some of the "old" stuff and make a touch more room in there

[N cee thirty]

i got my fazer mot'd today and asked the guy about loud exhausts

he said he's not failed one yet as there more of a safety device
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'00 Aprilia RS50 > '92 Honda CG > '99 Yamaha Fazer > '91 Yamaha RXS > '79 Suzuki X5 > 01' Honda Cg > 07' Honda Cg > 82' Kawasaki Z200 > suzuki gsxr 400 gk73a > honda vfr 400 NC30 Mod 2 Passed 09/06/2011

Jewlio Iglesias wrote: I actually did vote BNP once

[MaybeGuy]

I fail to see how over packing can cause excessive back pressure. If anything I imagine it would make it louder if it was packed too tightly. No matter how tightly you pack it, it wont affect air flow, and therefore won't affect back pressure.
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Blue_SV650S wrote: it was a sh1te wheelie, but it proves that he can get it up in 3rd and can do angles. In summery, mattsprattuk is a gobby little sh1tebag, dopehead tw4t, but sadly for all of us, he probably isn't THAT full of sh1te!!
Kickstart wrote: Hi I tend to agree with Matt. All the best Keith

[0l0dom0l0]

[The Artist]

My new zorst is so quiet.

I can barely hear it out and about.

[bladerunner]

over packing will make the exhaust louder as the sound waves wont be able to be absorbed by the silencer.....so if it's quiet then id say should be fine..unless you were ramming in the packing with a bar and tamping it down? as for over packing being dangerous by increasing the back pressure......if you make a pipe longer it will take more pressure to flow the same amount of gas due to the extra drag. Like stingers in stroker exhausts are used to keep the correct pressure in the chamber etc. i very much doubt it would cause a problem on a road bike and deffo no worse than if the packing had gone old and coked up anyhow.
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Current bikes...cbr929, KDX200's, Rd125lc mk2, RGV250's

[Casper]

I was going to buy this packing stuff but never used it before. Do i just pack round the inside of the end can and leave a hole in the middle for the gas to flow? If it drops in the can will the gas still flow through the packing?

[Pete.]

[HD]

[SirEdward]

[Casper]

[Pete.]

Exhaust gases are not supposed to flow through the packing - it's there to deaden the sound pulses not restrict the flow. If you stuff the exhaust with packing where the gases flow it will just get blown out the back in a shower of sparks. Might get you through an MOT though.
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a.k.a 'Geri'

132.9mph off and walked away. Gear is good, gear is good, gear is very very good

[Wafer_Thin_Ham]