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B5 S4 and RS4 noise tests
Posted: Sun Feb 10, 2008 12:34 pm
by Doug_S2
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!
Posted: Mon Feb 11, 2008 10:49 am
by MarkB
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.
Posted: Mon Feb 11, 2008 11:26 am
by Doug_S2
I'll go an buy one at lunchtime!
Posted: Mon Feb 11, 2008 11:37 am
by MarkB
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
Posted: Mon Feb 11, 2008 1:55 pm
by Doug_S2
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?
Posted: Mon Feb 11, 2008 2:01 pm
by MarkB
Split from the original thread and moved here
Posted: Mon Feb 11, 2008 2:08 pm
by dace
Mine was tested recently at Oulton Park.
Full Milltek with 100 cpi = 95db using above method, albeit 5,000rpm
Posted: Mon Feb 11, 2008 2:17 pm
by Doug_S2
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?
Posted: Mon Feb 11, 2008 2:51 pm
by BRETTCOLLINS
Will be nice to see what mine does Doug..
Posted: Mon Feb 11, 2008 2:59 pm
by Doug_S2
what was yours at castle combe?
Posted: Mon Feb 11, 2008 3:07 pm
by BRETTCOLLINS
Not sure doug, low but didn't they check at 3K. My exhaust doesn't get loud till About 4.5K LOL
Posted: Mon Feb 11, 2008 3:36 pm
by Doug_S2
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
Posted: Mon Feb 11, 2008 3:44 pm
by GrahamS4
Good thread!
Posted: Mon Feb 11, 2008 3:54 pm
by BRETTCOLLINS
Will get you to check it when I am next down, if you have the time...
Posted: Mon Feb 11, 2008 4:07 pm
by Nige_RS4
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!