Just a tad more noise

[lazyitus]

That's all I want.

It's currently standard 500 but I want just a tad more volume, enough to notice but not too much that I can't track it.

What are the best options for achieving this with little spend ?

[chris52]

Removeing the pre-cats in each manifold will give a lttle more volume and if you do it yourself will only cost you time and a set of manifold gaskets.

Chris

[Wildfire]

For a little more volume and different not, try the ACT Cherry Bomb System. Removing the Pre-Cats combined with any exhaust mods, generally equals lots of noise.

[yellowgriff]

Your better of listening to some ones car that you like the sound of & ask what they have done,Just taken out the pre cats & main catt sound great . My opinion only..Thinking about taking rear box out, but going to run it for a few months first,,

[griffin8or]

Hi , for what its worth i have stripped exhaust of both pre and main cats , and taken the insides of box out .
The result is definitely a tad more noise , i love it , think it sounds great .
Went to watch the TVR s sprint at Lydden a few months ago , and the very nice marshal with the noise level tester checked me out ; result at 4000rpm was 104 dcb out of one pipe and 106 from the other , giving an average of 105 which should still allow you to track the beast

[renagademaster]

Surely the easiest and cheapest thing to do is to sleeve the centre box!

No issue with track days or MOT tests then!!

[lazyitus]

Some interesting thoughts.

I think, as mentioned, I need to hear some that have had these 'operations'..

[Mr MoJo]

Mine has a sleeved 'sports' exhaust conversion and both the cats and the pre cats are still in place. It is however very loud for some reason, 108db at idle and 119db max at The Growl this year.

This may be some help (LG's official results from 2009 Growl) :

Name	Model	Exhaust Mods (if any)	4K	MAX
lordgrover	430 precat	V8Enhancements tuned manifolds	?	?
chris52	500	Straight through!	?	?
350Matt	430 precat	sports silencer and ACT manifolds	107	116
Mr MoJo	500SE	Straight through with standard Cats	108	119
2Munkys	540	De-catted, that's all	106	-
S6 ROR	500SE	Middle box modded, else standard	108	-
5ltr	500	ACT sports	104	-
FFG	4.3BV	ACT manifolds and quad exit cherrybomb with bigger bore exit (then the standard peashooter) and 2" longer (to stop the crap build up)	117	120
daggsy	430 precat	standard	106	-
culminator	450 BV precat	Act manifolds and loud green paintwork	?	?
Ant	460 STG3BV precat	Standard manifolds and SS system	?	?
dnb	500	Standard exhaust + ACT manifolds	115	-
davetherave1970	500	act de-cat Y, pre-cats removed, offord's cherrys	?	?
swanny	500	pre-cats out, ACT Y piece and ACT cherry bomb exhaust	?	?
tavan	500	no precats	?	?
griffdude	450 BV precat	V8Enhancements tuned manifolds, else standard	?	?
ianrose	500	standard	?	?
Gunshot (wound)	500	part standard, no precats, straight through	?	?
The Moosehunter	500precat	Decat with V8Enhancements down tube fitted with childish butterfly dump valve else standard	108	-
gopher	430 precat	standard	?	?
combine	7	standard	103	?
wadsapple	520	?	105	-
Leon Hewis	500	?	104	-
Ashley	500	?	109	117
marks3drtaz	500	?	103	-
John Jones	430	?	104	-
Chris (& Bridget)	430	quad pipes	117	118

Edited by Mr MoJo on Wednesday 25th November 15:15

[lazyitus]

Mr Mojo, that's very useful.

Thanks.

[dhf]

Take the pre cats out and fit one of Clive F's Y piece's.for me that is the best compromise.if you want more start playing with the back box.for me this gives the best vocals without being too loud,i went the straight through route and found it just too tractorish.

[450Nick]

I wouldn't worry about track noise... I have the full ACT decat sports manifolds and cherry bomb exhaust as Wildfire does. They have quite a different noise due to the engines, but are still both bloody loud. On mine though, I've had the pipes cut off about 30cms before the exit and have two sets of slide on pipes at the back; one straight through for full noise (around 109db at 3.5k), and one fatter set (still with slash cut ends so they look awesome), which brings it down to 101db at 4k for the track. No loss in bhp (tested), and they're so good in fact that I've left them on for the last month after doing my last trackday as it sounds lovely to drive and I've been doing boring journies only.

That said, I'm bored of quiet now and will be going back to loud this weekend! Takes around 5 mins (1 jubilee style clip with a bolt instead of a screw for each pipe to loosen) to swap them over.

Edited by 450Nick on Thursday 26th November 08:21

[lewis_sharman]

450Nick said:

I wouldn't worry about track noise... I have the full ACT decat sports manifolds and cherry bomb exhaust as Wildfire does. They have quite a different noise due to the engines, but are still both bloody loud. On mine though, I've had the pipes cut off about 30cms before the exit and have two sets of slide on pipes at the back; one straight through for full noise (around 109db at 3.5k), and one fatter set (still with slash cut ends so they look awesome), which brings it down to 101db at 4k for the track. No loss in bhp (tested), and they're so good in fact that I've left them on for the last month after doing my last trackday as it sounds lovely to drive and I've been doing boring journies only.

That said, I'm bored of quiet now and will be going back to loud this weekend! Takes around 5 mins (1 jubilee style clip with a bolt instead of a screw for each pipe to loosen) to swap them over.

Edited by 450Nick on Thursday 26th November 08:21

How much were these out of interest? I will be looking for something similar soon.

[450Nick]

I can't remember exactly, but around £100 IIRC. They were made as a bit of a one off as my old track cans were choking the engine after I put the blower on. If you give Tim Lamont at ACT a ring and say you want some track cans like mine, he'll know what you mean and can give you a more accurate price. Given that they've been done now though, they may be slightly cheaper...

Very pleased with mine though, they look the business and work a treat - knocking nearly 10db off, they are the best track cans I've seen thanks to their extra length. Not losing any bhp even at 400+ is impressive as well. Usually you lose bhp as well as noise!