Exhaust Silencer & packing

[Prawn]

We seem to have had a few issues wih getting our clubsport down the the required noise levels and keeping it there.
Having looked at a few other club / prosports it seems our silencer is somewhat shorter than most.

Can anyone measure the lenght of their silencer for me?

Also any tips on packing, I use a layer of wire wool and then two complete turns of eglass but this seems to only last a very short time.
How do other peolple pack theirs?

[RobC]

Think mine is now 24", you can buy just the outer sleeve and perforated tube from Merlin (assuming you have the standard exhaust can)

I have modified the exhaust slightly by adding a baffle plate on the outside of the perforated tube about 1/3 of the way down from the manifold end. This is basically plate welded to the tube which make two chambers in the exhaust. The baffle knocks about 1-2dB off the exhaust (measured at Combe) but has no noticeable effect on performance. However even with this mod I have resided myself to repacking the exhaust before each meeting.

Edited by RobC on Monday 4th February 12:28

[jpivey]

In five years of having Radicals i have never failed a noise test or touched the silencer, then i do bung the bloke doing it a tenner before he does the noise test

[RobC]

Two words that'll break your record ....

Castle Combe

Edited by RobC on Monday 4th February 14:18

[Simon T]

Two words that send a chill across the ether

[jpivey]

Strange place combe re: noise i was there last year with a clio cup race car had been at brands on a track day and the car was about 94 db get to combe if i remember about 110 db???

[NASA racer]

I had good success last weekend with my Prosport using a fully-packed Radical muffler with a Supertrapp welded on a 90 degree end. The sound station at Laguna Seca is on the right of the track.

My db meter was saying 89db (from the pits to the track) and I never got a notice that I'd hit the magic 92 db.

[RobC]

Supertrap....evil things