Need to repack exhaust... Where to get Wadding???

[peterpeter]

I need to repacka Wunoff exhaust as it is now reading around the 102 db mark.

I am going to remove the rear end of the silencer, and I am going to have to roll a sheet of some form of wadding around the inner silencer.

Any ideas where I can get some from????

I am thinking a retail outlet, so I can pick some up direct.

Dont suppose Halfords would have any??

[DustyC]

How about requesting this on the TVR forum. Owners are always ripping their wadding out!

[kitt]

If your anywhere near Castle Combe, Merlin motorsport have both the wadding and the sheeting. They'll mail it to you as well if you're not near them.

[Charisma]

Try TechCraft Motorsport Ltd, Warwick, 01926 403721

I bought some last year, cost £31.73 inc P&P and VAT. The pack does enough for at least two silencers.

[kitcarman]

Peter,
Pilgrim side pipes are packed with ordinary fibreglass chopped strand matting (csm). It costs roughly 80p per square metre to a fibreglass laminating company.

So, look in your yellow pages for a local laminating company.

Den

[Willy the Kit]

Fibreglass chopped strand matting works well and is about ever lasting. It doesn't damp as good as ordinary glass wool or rock wool, also the sound is lower. Problem with wool is that you need to repack your pipes every couple of years.

Willy

[Avocet]

If you're going to use CSM, make sure you wash the seize out of it first! It is impregnated with stuff that keeps it together in a mat. The "stuff" dissolves in styrene so it can change shape when full of resin. It also disolves in water so soak the mat and then dry the fibres. You'll need a lot more than you think! Use a long piece of bar or studding to "tamp" it down well - you can't pack it too dense! Also try "rockwool" but I don't know where you'd get it.

[kitcarman]

Avocet said:

If you're going to use CSM, make sure you wash the seize out of it first!

Is there a problem with leaving it to the exhaust to simply burn it away? It’s only starch isn’t it?

I’ve never tried to wash it out

Den


>> Edited by kitcarman on Saturday 13th March 11:58

[docevi1]

what is the legal noise limit of a car? I'm now worried, and how "loud" is that limit?

[kitcarman]

docevi1 said:

what is the legal noise limit of a car? I'm now worried, and how "loud" is that limit?

There is no practically enforceable noise limit. So long as there are no leaks in the system, there’s nothing the police can do.

The reason why it’s being discussed here, I suspect, has more to do with track day use than road use. Most tracks have some sort of noise limit. Usually 100 or 103dB.

Den


>> Edited by kitcarman on Saturday 13th March 11:57

[docevi1]

thanks Den, my mind is at rest now

[kitcarman]

Did you know that 103dB is TWICE AS LOUD as 100dB?

Another piece of useless from the chief buller.

Den

[busa_rush]

I thought the police could still do you for a noisey exhaust if they, in their opinion, thought the noise to be at a level which was anti-social ?

I guess anything below the SVA noise limit can't be anti-social ?

[kitcarman]

I’d better be careful wearing my loud jumpers in public places then.

Den.

[docevi1]

whats the SVA limit? My car never got SVA'd (didn't need to).

[kitcarman]

Like I said

kitcarman said:

There is no practically enforceable noise limit.

DEN

[margo]

Tell that to the spot check plod at anywhere bikers congregate !

[kitt]

docevi1 said:

whats the SVA limit? My car never got SVA'd (didn't need to).

The SVA limit is 101dB measured at 45 degrees from the exhaust. This in theory it is the legal requirement but we all know what happens when the SVAs over

However, as other's have mentioned there is not MOT limit so thus not really enforced. Mine is currently pretty loud as all the packing has pretty much burnt out (backfires a bit ) and I shan't bother quieting it down 'til I have to (i.e. trackdays)

[kitt]

margo said:

Tell that to the spot check plod at anywhere bikers congregate !

So what do plod actually measure then? or do they just guess at what's too loud? I'm guessing those Harleys that make your internal organs rattle may be a tad too loud

[margo]

In Brighton, at least, they guess, then they look for the correct kite markings on the silencer. If you haven't got that () they pack you off to the MoT centre.

I was told by a traffic officer that some forces test both cars and bikes to type approval limits, ie: 101dBA @ 3/4 max power speed in an open area with the sound meter half a metre away at 45deg from the exhaust outlet. I don't know the veracity of this though.