Quietest exhaust
14 October 2010, 01:58 PM
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Quietest exhaust
Afternoon all,
I have a classic type R with the cat downpipe currently fitted (but have a decat, just not fitted it yet). It has a stainless hks decat exhaust fitted (with a resonator), 1 piece, from the downpipe back. At idle it is almost silent, which is nice. When driving though, it is slightly too loud. It is nowhere near a nur spec and is also quieter than a vortex.
What are my options to get a quieter exhaust that will let me goto 100db trackdays? Is a custom exhaust with large resonator and larger backbox the way to go? Power levels will remain under 400 bhp, but it still needs to flow better than the standard exhaust.
Any ideas?
Thanks,
I have a classic type R with the cat downpipe currently fitted (but have a decat, just not fitted it yet). It has a stainless hks decat exhaust fitted (with a resonator), 1 piece, from the downpipe back. At idle it is almost silent, which is nice. When driving though, it is slightly too loud. It is nowhere near a nur spec and is also quieter than a vortex.
What are my options to get a quieter exhaust that will let me goto 100db trackdays? Is a custom exhaust with large resonator and larger backbox the way to go? Power levels will remain under 400 bhp, but it still needs to flow better than the standard exhaust.
Any ideas?
Thanks,
14 October 2010, 02:08 PM
#2
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This might help:
I had a Cat back system on my classic - Afterburner mid section and Ninja II back box. It was measured at 89dB (Peak) at 5.5k rpm 1m from the tail pipe section. The package was less than six months old.
I had a Cat back system on my classic - Afterburner mid section and Ninja II back box. It was measured at 89dB (Peak) at 5.5k rpm 1m from the tail pipe section. The package was less than six months old.
14 October 2010, 03:39 PM
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my bug eye was running 360 hp and was only 93db at castel comb the tester said scoobys are quite quiet with the burble that was with a 3.5" straight through and a hks back box hope this helps also passed the mot fine
14 October 2010, 03:49 PM
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Id say go custom mate. The guy that done mine in South Wales can make it as loud or quiet as you want without restricting performance
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14 October 2010, 05:56 PM
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The car came with a Prodrive but it sounded sooooo chavvy so I went for the Sti as I wanted the performance without the looks like a drainpipe, louder than a B-52, look at me option 
The Sti one has a slight burble when you have been thrashing it but otherwise nice and inconspicuous
The Sti one has a slight burble when you have been thrashing it but otherwise nice and inconspicuous
Last edited by chtpcpo; 14 October 2010 at 05:58 PM.
need a custom silenced centre section !
14 October 2010, 11:11 PM
#15
I run a Revolution 3" exhaust on a 400 BHP Bugeye which hopefully does not wake the neighbours as I have to leave early to get to work .
http://www.revolution247.com/exhaust...e-69145-0.html
Shaun
http://www.revolution247.com/exhaust...e-69145-0.html
Shaun
Last edited by Midlife......; 15 October 2010 at 07:31 PM.
16 October 2010, 08:47 AM
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I run a Revolution 3" exhaust on a 400 BHP Bugeye which hopefully does not wake the neighbours as I have to leave early to get to work .
http://www.revolution247.com/exhaust...e-69145-0.html
Shaun
http://www.revolution247.com/exhaust...e-69145-0.html
Shaun
16 October 2010, 08:51 AM
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i had a revolution system on my bugeye & got one on my hatch sti for the same reason as shaun early starts ie 2/3 clock starts & never had neighbours complain about noise ,got bug eye tested for noise as mot tester said it was to loud & was 78dbon 5half revs, but u still get nice sound when u but foot down
16 October 2010, 11:20 AM
#22
My 3" revolution is completely cat-free 
, you have to be careful IIRC as it's a slip jointed system and needs adapters to mix and match with other systems.
Shaun
, you have to be careful IIRC as it's a slip jointed system and needs adapters to mix and match with other systems.Shaun
105db my **** !
17 October 2010, 09:37 PM
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Mine's pretty quiet at lowish to medium revs, so a reasonable degree of user control.
It's pretty much all Hayward and Scott, using the three and a half inch tail-piped stainless back box. Sound file attached.
HaywardScott.mp3
regards
Tim
It's pretty much all Hayward and Scott, using the three and a half inch tail-piped stainless back box. Sound file attached.
HaywardScott.mp3
regards
Tim
Last edited by awdx4; 17 October 2010 at 09:49 PM. Reason: typo
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