B5 S4 and RS4 noise tests

Discuss common aspects of Audi RS and S tuning and modifications
dace
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Post by dace » Fri Feb 15, 2008 7:30 pm

Doug_S2 wrote:i am doing all my tests at 4500rpm(which CC use) - daces results were from a trackday test and they used 5k?(Ithink)
It was done at Oulton Park a couple of weeks ago. 5,000rpm.
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Post by Philws4 » Sat Feb 16, 2008 10:19 am

Just got the new reg document through for the wife's new car and on first page , section 'U' gives dB reading of 82 @4500 rpm, and a drive-by reading of 71 dB ,but doesn't say at what distance the drive-by is done.

HTH
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Doug_S2
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Post by Doug_S2 » Sat Feb 16, 2008 11:07 am

S4 ko3s stock exhaust = 77 dB
S4 ko3 turbos stock DPs and 3" miltek catback = 77.5dB (does sound deeper though)
s4 ko4 turbos, stock s4 DPs no precats, 3" single milltek catback = 78.5db
s4 200 cell miltek DPs + 3" milltek catback = 80.8dB
Renault Scenic - the Ash express = 81.3dB
S4 nocats full custom(smallish bore) k04 = 82.1dB (Dr_Wimpkins)
S4 Nocat Milltek DPs, 3" catback s4 ko3 = 82.2dB (Chris_M)
S4 ko4s, nocat milltek downpipes, s4 dual catback, non resonated = 87.5dB (SATAN)
RS4 milltek 100 cell miltek catback = 83.9dB (jeffw)
RS4 no cat milltek downpipes, milltek resonated catback 91dB (Ash)
RS4 no cats RS full exhaust(2 boxes) K16s = 94.4dB
ads4 95db at Castle Combe - Milltek 100cpsi with dual resonated link pipes.
RS4 full Milltek 100cpsi = 95db (Dace)
Dougs Mota! 101.5 dB (but Castle Combe said 99 and 100 dB)
S2 Coupe : S4 B5 WB : RS6 C5 : S4 B8 : R8 V8 Turbo : Q7 4.2 TDI

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Doug_S2
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Post by Doug_S2 » Sat Feb 16, 2008 5:19 pm

s4 KOS3 Stock exhasut = 76.5dB (paz)
S4 ko3s stock exhaust = 77 dB
S4 ko3 turbos stock DPs and 3" miltek catback = 77.5dB (does sound deeper though)
s4 ko4 turbos, stock s4 DPs no precats, 3" single milltek catback = 78.5db
s4 200 cell miltek DPs + 3" milltek catback = 80.8dB
Renault Scenic - the Ash express = 81.3dB
S4 nocats full custom(smallish bore) k04 = 82.1dB (Dr_Wimpkins)
S4 Nocat Milltek DPs, 3" catback s4 ko3 = 82.2dB (Chris_M)
S4 ko4s, nocat milltek downpipes, s4 dual catback, non resonated = 87.5dB (SATAN)
RS4 milltek 100 cell miltek catback = 83.9dB (jeffw)
RS4 no cat milltek downpipes, milltek resonated catback 91dB (Ash)
RS4 no cats RS full exhaust(2 boxes) K16s = 94.4dB
ads4 95db at Castle Combe - Milltek 100cpsi with dual resonated link pipes.
Porsche 996 turbo 650bhp titanium exhaust 96dB
RS4 full Milltek 100cpsi = 95db (Dace)
Dougs Mota! 101.5 dB (but Castle Combe said 99 and 100 dB)
S2 Coupe : S4 B5 WB : RS6 C5 : S4 B8 : R8 V8 Turbo : Q7 4.2 TDI

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Doug_S2
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Post by Doug_S2 » Mon Feb 18, 2008 2:19 pm

s4 KOS3 Stock exhasut = 76.5dB (paz)
S4 ko3s stock exhaust = 77 dB
S4 ko3 turbos stock DPs and 3" miltek catback = 77.5dB (does sound deeper though)
s4 ko4 turbos, stock s4 DPs no precats, 3" single milltek catback = 78.5db
s4 200 cell miltek DPs + 3" milltek catback = 80.8dB
Renault Scenic - the Ash express = 81.3dB
S4 nocats full custom(smallish bore) k04 = 82.1dB (Dr_Wimpkins)
S4 Nocat Milltek DPs, 3" catback s4 ko3 = 82.2dB (Chris_M)
S4 ko4s, nocat milltek downpipes, s4 dual catback, non resonated = 87.5dB (SATAN)
RS4 milltek 100 cell miltek catback = 83.9dB (jeffw)
RS4 stock DPs no precats, miltek catback non resonated = 88.9dB (big andy w)
RS4 no cat milltek downpipes, milltek resonated catback 91dB (Ash)
RS4 no cats RS full exhaust(2 boxes) K16s = 94.4dB
ads4 95db at Castle Combe - Milltek 100cpsi with dual resonated link pipes.
Porsche 996 turbo 650bhp titanium exhaust 96dB
RS4 full Milltek 100cpsi = 95db (Dace)
Dougs Mota! 101.5 dB (but Castle Combe said 99 and 100 dB)
S2 Coupe : S4 B5 WB : RS6 C5 : S4 B8 : R8 V8 Turbo : Q7 4.2 TDI

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Post by MarkB » Mon Feb 18, 2008 2:25 pm

Doug_S2 wrote: Porsche 996 turbo 650bhp titanium exhaust 96dB
If it's the one I went in, or anything like the one I went in the noise is unreal!
Mark

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Doug_S2
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Post by Doug_S2 » Wed Feb 20, 2008 1:47 pm

s4 KOS3 Stock exhasut = 76.5dB (paz)
S4 ko3s stock exhaust = 77 dB
S4 ko3 turbos stock DPs and 3" miltek catback = 77.5dB (does sound deeper though)
s4 ko4 turbos, stock s4 DPs no precats, 3" single milltek catback = 78.5db
s4 200 cell miltek DPs + 3" milltek catback = 80.8dB
Renault Scenic - the Ash express = 81.3dB
S4 nocats full custom(smallish bore) k04 = 82.1dB (Dr_Wimpkins)
S4 Nocat Milltek DPs, 3" catback s4 ko3 = 82.2dB (Chris_M)
S4 ko4s, nocat milltek downpipes, s4 dual catback, non resonated = 87.5dB (SATAN)
RS4 milltek 100 cell miltek catback = 83.9dB (jeffw)
RS4 stock DPs no precats, miltek catback non resonated = 88.9dB (big andy w)
RS4 no cat milltek downpipes, milltek resonated catback 91dB (Ash)
S4, rs6 turbos, RS4 heads, no cats dual 2.75" turbo back 2 boxes = 92dB
RS4 no cats RS full exhaust(2 boxes) K16s = 94.4dB
ads4 95db at Castle Combe - Milltek 100cpsi with dual resonated link pipes.
Porsche 996 turbo 650bhp titanium exhaust 96dB
RS4 full Milltek 100cpsi = 95db (Dace)
Dougs Mota! 101.5 dB (but Castle Combe said 99 and 100 dB)
S2 Coupe : S4 B5 WB : RS6 C5 : S4 B8 : R8 V8 Turbo : Q7 4.2 TDI

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Doug_S2
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Post by Doug_S2 » Thu Feb 21, 2008 9:35 pm

s4 KOS3 Stock exhasut = 76.5dB (paz)
S4 ko3s stock exhaust = 77 dB
S4 ko3 turbos stock DPs and 3" miltek catback = 77.5dB (does sound deeper though)
s4 ko4 turbos, stock s4 DPs no precats, 3" single milltek catback = 78.5db
RS4 precats gutted, miltek catback resonated = 80.2 dB (jarv)
s4 200 cell miltek DPs + 3" milltek catback = 80.8dB
Renault Scenic - the Ash express = 81.3dB
S4 nocats full custom(smallish bore) k04 = 82.1dB (Dr_Wimpkins)
S4 Nocat Milltek DPs, 3" catback s4 ko3 = 82.2dB (Chris_M)
S4 ko4s, nocat milltek downpipes, s4 dual catback, non resonated = 87.5dB (SATAN)
RS4 milltek 100 cell miltek catback = 83.9dB (jeffw)
S4 full SKN exhaust = 84.5dB (rikrose)
RS4 stock DPs no precats, miltek catback non resonated = 88.9dB (big andy w)
RS4 no cat milltek downpipes, milltek resonated catback 91dB (Ash)
RS4 no cat milltek downpipes, miltek resonated catback = 91.0dB (jarv)
S4, rs6 turbos, RS4 heads, no cats dual 2.75" turbo back 2 boxes = 92dB
RS4 no cats RS full exhaust(2 boxes) K16s = 94.4dB
ads4 95db at Castle Combe - Milltek 100cpsi with dual resonated link pipes.
Porsche 996 turbo 650bhp titanium exhaust 96dB
RS4 full Milltek 100cpsi = 95db (Dace)
Dougs Mota! 101.5 dB (but Castle Combe said 99 and 100 dB)
S2 Coupe : S4 B5 WB : RS6 C5 : S4 B8 : R8 V8 Turbo : Q7 4.2 TDI

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Post by jeffw » Thu Feb 21, 2008 10:56 pm

s4 KOS3 Stock exhasut = 76.5dB (paz)
S4 ko3s stock exhaust = 77 dB
S4 ko3 turbos stock DPs and 3" miltek catback = 77.5dB (does sound deeper though)
s4 ko4 turbos, stock s4 DPs no precats, 3" single milltek catback = 78.5db
RS4 precats gutted, miltek catback resonated = 80.2 dB (jarv)
s4 200 cell miltek DPs + 3" milltek catback = 80.8dB
Renault Scenic - the Ash express = 81.3dB
S4 nocats full custom(smallish bore) k04 = 82.1dB (Dr_Wimpkins)
S4 Nocat Milltek DPs, 3" catback s4 ko3 = 82.2dB (Chris_M)
RS4 milltek 100 cell miltek catback = 83.9dB (jeffw)
S4 full SKN exhaust = 84.5dB (rikrose)
S4 ko4s, nocat milltek downpipes, s4 dual catback, non resonated = 87.5dB (SATAN)
RS4 stock DPs no precats, miltek catback non resonated = 88.9dB (big andy w)
RS4 no cat milltek downpipes, milltek resonated catback 91dB (Ash)
RS4 no cat milltek downpipes, miltek resonated catback = 91.0dB (jarv)
S4, rs6 turbos, RS4 heads, no cats dual 2.75" turbo back 2 boxes = 92dB
RS4 no cats RS full exhaust(2 boxes) K16s = 94.4dB
ads4 95db at Castle Combe - Milltek 100cpsi with dual resonated link pipes.
RS4 full Milltek 100cpsi = 95db (Dace)
Porsche 996 turbo 650bhp titanium exhaust 96dB
Dougs Mota! 101.5 dB (but Castle Combe said 99 and 100 dB)

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rikrose
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Post by rikrose » Fri Feb 22, 2008 1:02 am

S4 full SKN exhaust = 84.5dB (rikrose)

I'm on KO3s :)
There's no pre-cats, and there's a single 100 cpsi race cat. It's also very quiet between 1k and 3k rpm, when off boost. I'm happy with it.
Goodwood green RS4, previously owned by jeffw

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Post by Doug_S2 » Sat Feb 23, 2008 5:48 pm

S4 ko3 Stock exhasut = 76.5dB (paz)
S4 ko3 stock exhaust = 77 dB
S4 ko3 turbos stock DPs and 3" miltek catback = 77.5dB (does sound deeper though)
s4 ko4 turbos, stock s4 DPs no precats, 3" single milltek catback = 78.5db
RS4 precats gutted, miltek catback resonated = 80.2 dB (jarv)
s4 200 cell miltek DPs + 3" milltek catback = 80.8dB
Renault Scenic - the Ash express = 81.3dB
S4 nocats full custom(smallish bore) k04 = 82.1dB (Dr_Wimpkins)
S4 Nocat Milltek DPs, 3" catback s4 ko3 = 82.2dB (Chris_M)
S4 Milltek 200 cell DPs, Miltek dual catback = 83dB (Paz)
RS4 milltek 100 cell miltek catback = 83.9dB (jeffw)
S4 full SKN exhaust = 84.5dB (rikrose)
S4 ko4s, nocat milltek downpipes, s4 dual catback, non resonated = 87.5dB (SATAN)
RS4 stock DPs no precats, miltek catback non resonated = 88.9dB (big andy w)
RS4 Hybrids, no cat milltek downpipes, miltek non resonated catback = 88.9dB (Doug)
RS4 no cat milltek downpipes, milltek resonated catback = 91dB (Ash)
RS4 no cat milltek downpipes, miltek resonated catback = 91.0dB (jarv)
S4, rs6 turbos, RS4 heads, no cats dual 2.75" turbo back 2 boxes = 92dB
RS4 no cats RS full exhaust(2 boxes) K16s = 94.4dB
ads4 95db at Castle Combe - Milltek 100cpsi with dual resonated link pipes.
RS4 full Milltek 100cpsi = 95db (Dace)
Porsche 996 turbo 650bhp titanium exhaust 96dB
Dougs Mota! 101.5 dB (but Castle Combe said 99 and 100 dB)
S2 Coupe : S4 B5 WB : RS6 C5 : S4 B8 : R8 V8 Turbo : Q7 4.2 TDI

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Doug_S2
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Post by Doug_S2 » Sat Feb 23, 2008 5:50 pm

A non resonated RS4 quieter than the resonated?? could be turbos making the difference. Will do 2 cars same spec of exhasut with and without resonated to compare on one day to be sure that is correct.
S2 Coupe : S4 B5 WB : RS6 C5 : S4 B8 : R8 V8 Turbo : Q7 4.2 TDI

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Post by jeffw » Sat Feb 23, 2008 6:53 pm

S4 ko3 Stock exhasut = 76.5dB (paz)
S4 ko3 stock exhaust = 77 dB
S4 ko3 turbos stock DPs and 3" miltek catback = 77.5dB (does sound deeper though)
s4 ko4 turbos, stock s4 DPs no precats, 3" single milltek catback = 78.5db
RS4 precats gutted, miltek catback resonated = 80.2 dB (jarv)
s4 200 cell miltek DPs + 3" milltek catback = 80.8dB
Renault Scenic - the Ash express = 81.3dB
S4 nocats full custom(smallish bore) k04 = 82.1dB (Dr_Wimpkins)
S4 Nocat Milltek DPs, 3" catback s4 ko3 = 82.2dB (Chris_M)
S4 Milltek 200 cell DPs, Miltek dual catback = 83dB (Paz)
RS4 Milltek downpipes, 100 cell cats, resonated Milltek catback = 83.9dB (jeffw)
S4 full SKN exhaust = 84.5dB (rikrose)
S4 ko4s, nocat milltek downpipes, s4 dual catback, non resonated = 87.5dB (SATAN)
RS4 stock DPs no precats, miltek catback non resonated = 88.9dB (big andy w)
RS4 Hybrids, no cat milltek downpipes, miltek non resonated catback = 88.9dB (Doug)
RS4 no cat milltek downpipes, milltek resonated catback = 91dB (Ash)
RS4 no cat milltek downpipes, miltek resonated catback = 91.0dB (jarv)
S4, rs6 turbos, RS4 heads, no cats dual 2.75" turbo back 2 boxes = 92dB
RS4 no cats RS full exhaust(2 boxes) K16s = 94.4dB
ads4 95db at Castle Combe - Milltek 100cpsi with dual resonated link pipes.
RS4 full Milltek 100cpsi = 95db (Dace)
Porsche 996 turbo 650bhp titanium exhaust 96dB
Dougs Mota! 101.5 dB (but Castle Combe said 99 and 100 dB)

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Doug_S2
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Post by Doug_S2 » Sat Mar 01, 2008 2:06 pm

S4 ko3 Stock exhasut = 76.5dB (paz)
S4 ko3 stock exhaust = 77 dB
S4 ko3 turbos stock DPs and 3" miltek catback = 77.5dB (does sound deeper though)
s4 ko4 turbos, stock s4 DPs no precats, 3" single milltek catback = 78.5db
RS4 precats gutted, miltek catback resonated = 80.2 dB (jarv)
s4 200 cell miltek DPs + 3" milltek catback = 80.8dB
Renault Scenic - the Ash express = 81.3dB
S4 RS4 Downpipes no precats, milltek dual catback = 81.9dB (CliveH)
S4 nocats full custom(smallish bore) k04 = 82.1dB (Dr_Wimpkins)
S4 Nocat Milltek DPs, 3" catback s4 ko3 = 82.2dB (Chris_M)
S4 Milltek 200 cell DPs, Miltek dual catback = 83dB (Paz)
RS4 Milltek downpipes, 100 cell cats, resonated Milltek catback = 83.9dB (jeffw)
S4 full SKN exhaust = 84.5dB (rikrose)
S4 ko4s, nocat milltek downpipes, s4 dual catback, non resonated = 87.5dB (SATAN)
RS4 stock DPs no precats, miltek catback non resonated = 88.9dB (big andy w)
RS4 Hybrids, no cat milltek downpipes, miltek non resonated catback = 88.9dB (Doug)
RS4 no cat milltek downpipes, milltek resonated catback = 91dB (Ash)
RS4 no cat milltek downpipes, miltek resonated catback = 91.0dB (jarv)
S4, rs6 turbos, RS4 heads, no cats dual 2.75" turbo back 2 boxes = 92dB
RS4 no cats RS full exhaust(2 boxes) K16s = 94.4dB
ads4 95db at Castle Combe - Milltek 100cpsi with dual resonated link pipes.
RS4 full Milltek 100cpsi = 95db (Dace)
Porsche 996 turbo 650bhp titanium exhaust 96dB
Dougs Mota! 101.5 dB (but Castle Combe said 99 and 100 dB)
S2 Coupe : S4 B5 WB : RS6 C5 : S4 B8 : R8 V8 Turbo : Q7 4.2 TDI

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Post by GrahamS4 » Sat Mar 01, 2008 4:18 pm

Intersting comparison between CliveH and Paz there:

S4 RS4 Downpipes no precats, milltek dual catback = 81.9dB (CliveH)
S4 Milltek 200 cell DPs, Miltek dual catback = 83dB (Paz)

Same cat back but a noticable db difference between the RS4 downpipes (gutted precats) and the Miltek downipes with 200 cell cats.

Does the difference between a k03 and a k04 turbo account for some of that do we think?
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