Track Day Silencers

[AlVal]

I've seen a few little short silencers on ebay being flogged which clamp on to the exhausts to reduce the noise level for trackdays - has anyone used them? do they do what they say on the tin? if so, Id best find myself some during the week :|

[TT Tim]

AlVal said:

I've seen a few little short silencers on ebay being flogged which clamp on to the exhausts to reduce the noise level for trackdays - has anyone used them? do they do what they say on the tin? if so, Id best find myself some during the week :

Yes they work - very sucessfully.

Best place to buy new is from Tim @ ACT: http://www.actproducts.co.uk/silencing.php

Tim

[morebeanz]

Just look out for fit, and whether they rub or bounce on to the bodywork. Some of them are quite short and stubby, and can rub on the rear valance...

[Pecky]

Tim, a question for you. I visited Oulton Park on Friday for my first track day in my newly purchased 4.2 Cerb with cats and sports exhaust fitted, and couldn`t get on due to registering 108 dab on the meter. What would I expect to see with ACT`s silencers fitted? I would expect it to drop it below Oulton`s 105 limit, but would it take it down to 98dab or below which seems to be the limit on a lot of the countrys circuits?
P.s. Had to passenger in my mates Sagaris most of the day, he even let me have a go, cheers Graham, very quick and grippy car, with some sticky tires, we even managed to hang on to a Radical for a few laps.

[FUBAR]

The ACT silencers took my car down from 109dba to 98 dba, so you should be OK

[Nefarious]

Live closer to Knockhill - no noise limits!

[C2HYM]

Pecky said:

Tim, a question for you. I visited Oulton Park on Friday for my first track day in my newly purchased 4.2 Cerb with cats and sports exhaust fitted, and couldn`t get on due to registering 108 dab on the meter. What would I expect to see with ACT`s silencers fitted? I would expect it to drop it below Oulton`s 105 limit, but would it take it down to 98dab or below which seems to be the limit on a lot of the countrys circuits?
P.s. Had to passenger in my mates Sagaris most of the day, he even let me have a go, cheers Graham, very quick and grippy car, with some sticky tires, we even managed to hang on to a Radical for a few laps.

i was wondering if you were a PHer.(very nice Cerb btw)

I was in the blue E30 M3, as my Cerb decided not to play on the Thursday My mate had a chat with you I think.

Mine has linked de-cats and exactly the same sports pipes as yours and with the track silencers was 103-4 db @ 4000rpm. What were they making you rev to? I had to hold the M3 @ 5200rpm.

Edited by C2HYM on Monday 19th November 11:16

[Nickccc]

I have a set in the garage, only used once.
If you fancy a test before buying mail me, I don't need them as I have the SP backbox.
Maybe for sale if you need,they are the ACT ones.
Nick.

[thegreengoblet]

Nickccc said:

I have a set in the garage, only used once.
If you fancy a test before buying mail me, I don't need them as I have the SP backbox.
Maybe for sale if you need,they are the ACT ones.
Nick.

Hey Nick

What do you have up front exhaust wise to complement the SP back box?

(PS Sorry for hijacking the subject)

[Nickccc]

The full SP system including linked decats, no manifold yet still on the standard one.

[Pecky]

C2HYM said:

Pecky said:

Tim, a question for you. I visited Oulton Park on Friday for my first track day in my newly purchased 4.2 Cerb with cats and sports exhaust fitted, and couldn`t get on due to registering 108 dab on the meter. What would I expect to see with ACT`s silencers fitted? I would expect it to drop it below Oulton`s 105 limit, but would it take it down to 98dab or below which seems to be the limit on a lot of the countrys circuits?
P.s. Had to passenger in my mates Sagaris most of the day, he even let me have a go, cheers Graham, very quick and grippy car, with some sticky tires, we even managed to hang on to a Radical for a few laps.

i was wondering if you were a PHer.(very nice Cerb btw)

I was in the blue E30 M3, as my Cerb decided not to play on the Thursday My mate had a chat with you I think.

Mine has linked de-cats and exactly the same sports pipes as yours and with the track silencers was 103-4 db @ 4000rpm. What were they making you rev to? I had to hold the M3 @ 5200rpm.

Pecky said: The Cerb was measuring 108dab at 4800rpm, and even dropping it to 4500rpm it still measured 107.

Edited by C2HYM on Monday 19th November 11:16[/footnote]

[footnote]Edited by Pecky on Tuesday 20th November 12:20

[thegreengoblet]

Nickccc said:

The full SP system including linked decats, no manifold yet still on the standard one.

Apart from the price(!) what's the difference between the linked decats supplied by SP and one from say TCS?

[JensenA]

thegreengoblet said:

Nickccc said:

The full SP system including linked decats, no manifold yet still on the standard one.

Apart from the price(!) what's the difference between the linked decats supplied by SP and one from say TCS?

1. Quality
2. They're designed as part of the full SP System

[Byker28i]

I've seen Alan's SP system and it sounds great and is a really good fit.

I've got the ACT trackday silencers and I've lent them out when I've got through the limit. On my car they've knocked it from 106db to under 98db.

I lent them out at Brands and they dropped another car from something like 112/114db to under 105db.

[AlVal]

so at some tracks you can get away with taking them off once through the test?

[TT Tim]

AlVal said:

so at some tracks you can get away with taking them off once through the test?

Only if you want to be black flagged.

Tim