B5 S4 and RS4 noise tests

[BRETTCOLLINS]

Got to love the peco big bore 4 back box....

[Doug_S2]

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 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)

[MarkB]

Interesting to see Adams car came out loader than Julian's! It shouldn't have, unless Adams was tested at higher revs...

[jeffw]

How can a catted Milltek (Dace) be louder then a non-cat on Ash's or the RS Fab exhaust ???

Be interesting to see what mine does tomorrow

[Doug_S2]

dace is done at higher revs - should be a not on that - i don't thing adams is as loud as 95 dB - maybe we should have my measurment nad other measurements

[MarkB]

I think for the list to work. All the cars need to be tested @ MRC or at least with Doug's noise meter.

[spen]

and at the same rpm?

[MarkB]

and at the same rpm?

Obviously. If not obvious, then yes!

[spen]

ok ok, but

dace is done at higher revs

that's all....

[Doug_S2]

i am doing all my tests at 4500rpm(which CC use) - daces results were from a trackday test and they used 5k?(Ithink)

[MarkB]

Bring the noise meter to the rolling road day, should be plenty to do there... and RS246 Live!

[S4TAN]

Interesting to see Adams car came out loader than Julian's!

My car is just weird. Runs crazy boost and very high torque (28psi and ~500lbf.ft) on Milltek no-cat d/p's, non-res link pipes and Dual catback, yet is quiter than Adams with cats and res link pipes .... go figure.

[Ads4]

Hopefully I was given duff info at Castle Combe and the db level is lower - seeing as the 'ring are supposedly clamping down on cars over 95db then that'll be a good thing

DavidT's was 94db at Castle Combe, same set up as mine I think.

[spen]

95 dB?? Most passengers scream louder than 95 dB...

S4tan, does your car hold that 28psi to the redline?

[S4TAN]

S4tan, does your car hold that 28psi to the redline?

No - tapers down to about 21/22psi from what I've seen (only managed a few very quick glances: need to be looking out the windscreen at redline - distances shrink very quickly at that speed!)