B5 S4 and RS4 noise tests

Discuss common aspects of Audi RS and S tuning and modifications
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Doug_S2
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B5 S4 and RS4 noise tests

Post by Doug_S2 » Sun Feb 10, 2008 12:34 pm

Ash's and jimbos both have the resonated link pipes. These make a difference and get rid of the boominess in the cabin. The nocat DPs are louder but also deeper than the milltek or gutted stock. I thought both these cars were not overbearingly loud. I think the cars with 100 cell cats and non resonated link pipes are louder.

I think that video link is a miltek downpipe car with a single 3" catback so not really representative of the noise from the RS4 milltek.

time to get that dB meter to get a database of noise levels!
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Post by MarkB » Mon Feb 11, 2008 10:49 am

Jarv wrote:No Mark, Milltek resonated cat-back, standard DP's with gutted pre-cats.
Ah, so it was neily's car with the 100cpi cats @ Thorney

time to get that dB meter to get a database of noise levels!
That's a very good idea.
Mark

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Post by Doug_S2 » Mon Feb 11, 2008 11:26 am

I'll go an buy one at lunchtime!
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Post by MarkB » Mon Feb 11, 2008 11:37 am

Doug_S2 wrote:I'll go an buy one at lunchtime!
I don't expect you've got anything better to do or are busy :lol:
Mark

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Post by Doug_S2 » Mon Feb 11, 2008 1:55 pm

right:

S4 Nocat Milltek DPs, 3" catback s4 ko3 = 82.2dB (Chris_M)
RS4 no cats RS full exhaust(2 boxes) K16s = 94.4dB
S4 nocats full custom(smallish bore) k04 = 82.1dB (Dr_Wimpkins)
Renault Scenic - the Ash express = 81.3dB

more to come.
all done at 1 metre, 45 degree pointing at exhaust, held at 4500rpm - i htink this is the way CC measuret he static noise - when i get my car back today i can check to see how close i measure as i got 99dB nad 100dB on their tests.

chuck this into its own thread somewhere?
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Post by MarkB » Mon Feb 11, 2008 2:01 pm

Split from the original thread and moved here :)
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Post by dace » Mon Feb 11, 2008 2:08 pm

Mine was tested recently at Oulton Park.

Full Milltek with 100 cpi = 95db using above method, albeit 5,000rpm
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Post by Doug_S2 » Mon Feb 11, 2008 2:17 pm

i'll do another couple of cars at 5000 and see if there is a common fudge factor to get all these numbers correlated

resonated or non resonated Dave?
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Post by BRETTCOLLINS » Mon Feb 11, 2008 2:51 pm

Will be nice to see what mine does Doug..
MING BLUE AUDI S4
Car is on Lock down

506.9 BHP @ 6.020 RPM
445.0 WHP @ 5.981 RPM
481.5 IBFT @ 4.976 RPM

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Post by Doug_S2 » Mon Feb 11, 2008 2:59 pm

what was yours at castle combe?
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Post by BRETTCOLLINS » Mon Feb 11, 2008 3:07 pm

Not sure doug, low but didn't they check at 3K. My exhaust doesn't get loud till About 4.5K LOL
MING BLUE AUDI S4
Car is on Lock down

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445.0 WHP @ 5.981 RPM
481.5 IBFT @ 4.976 RPM

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Post by Doug_S2 » Mon Feb 11, 2008 3:36 pm

it was 4500 at castle combe - turbo cars don't get loud till they are spinning away anyway - and the nthey get louder when wasegates open
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Post by GrahamS4 » Mon Feb 11, 2008 3:44 pm

Good thread!
Present: 2010 Ice silver B8 S4 s-tronic saloon (standard)
Past: 1998 Agate grey B5 S4 saloon (MRC tuned)
Hers: 2011 Volcano red 8P A3 Sportback 2.0 TDI 170 sport quattro

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Post by BRETTCOLLINS » Mon Feb 11, 2008 3:54 pm

Will get you to check it when I am next down, if you have the time...
MING BLUE AUDI S4
Car is on Lock down

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445.0 WHP @ 5.981 RPM
481.5 IBFT @ 4.976 RPM

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Post by Nige_RS4 » Mon Feb 11, 2008 4:07 pm

Doug_S2 wrote: I thought both these cars were not overbearingly loud.
Maybe that's because you're a little hard of herring from that damn noisey exhaust of yours ;-)

He,he!
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