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  • Some Exhaust db sound levels

  • Bhp or Beefy Sounds...
Bhp or Beefy Sounds...
 #3664037  by SeanEP3
 Tue Jul 30, 2013 4:02 pm
No sure if this has been covered yet..

DC manifold > Spoon Mid Pipe > OEM Backbox = 98db @ 5500rpm

Sean
 #3665620  by benspeed
 Sat Aug 03, 2013 9:25 am
Had mine measured at Castle Combe last weekend.

Piper manifold > Fujitsubo RM01A system. = 88Db at 4500rpm.
 #3667183  by pdapaul
 Wed Aug 07, 2013 9:03 am
Japspeed manifold(decat) buddyclub pro spec 3 cat back

@ 4500rpm
With bung 98db
Without bung 102db

@ 6000rpm (3/4 red line)

Without bung 108db :-D
 #3667593  by SeanEP3
 Wed Aug 07, 2013 11:08 pm
lol, I used to have a mugen manifold with a spec 3. was fecking stupid! haha
 #3775475  by Danith
 Thu Jun 19, 2014 9:54 am
I'm a tad worried about mine now. Phone app says 91db at 75% at stand still.

DC5 mani and cat, silenced cobra 2.5" b pipe with Cobra back box (that spat it's wadding out) and Tegiwa M box.

If a std setup is 93 then what the hell will mine be?!
 #3815899  by cammy92
 Wed Jan 14, 2015 5:34 pm
Major thread resurection here,
Anyway
I have m2 dolphin back box with unsilenced centre pipe and oem cat/manifold its far too loud to even think about taking on track,
Gets complaints from neighbors and things so...
Has anybody tested the Db of the dolphin back box with the silenced m2 centre pipe and a 4-2-1 (tegiwa, japspeed etc) manifold?
Car will finally be ready for some track action soon, if it still wont do i will ither go tegiwa catback, solid fab 3" catback or tdi north 3" catback
Cheers in advance [smilie=karls_thumb.gif]
 #3849515  by LG87
 Wed Feb 03, 2016 2:40 pm
Interesting thread !

Does anyone have a reading for the DC sport cat back on a standard manifold? wanting to do some track days but a bit worried the DB level will be too high.

Thanks in advance,
 #3853717  by Seany-ads
 Sat Apr 02, 2016 3:16 pm
This is a good thread guys. Ive just got back from action day at combe and ive got std, spoon & spoon and i was recorded at 106 so im in a mega dilemma. Im now on the hunt for a standard back box or is there a quite backbox that will go with a spoon b pipe.. Or has anyone on the forum got and had fitted a 3 inch tdi system or any of the TDI north guys on here got any info? Cheers all
 #3865450  by MrHanky
 Wed Nov 22, 2017 11:23 am
Just for future reference in case anyone goes a similar setup:

Japspeed Manifold / Spoon B pipe / Spoon N1. Also have TDI ITB's on.

Was black flagged at Blyton last year within 3 laps even laying off the throttle near the sound trap. Was way over the limit.
Javelin track day organizer did a static check and whilst I cannot remember exactly what it was, is was certainly over 112db at 4500 RPM
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