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displaying posts 1 to 24 of 24
| Author | Subject: Brans Hatch Drive By DB Test |
 ravemercer
Regular  Location: kent Registered: 18 Jan 2009 Posts: 422 Status: Offline |
Post #1
I've tried calling the noise info department they never pick up so can anyone tell me details about the noise testing they do at brands hatch getting the 6 ready for track day wanted to replicate the test to make sure its within regs as static is close. I've tested the 6 static at 101db  @ 5650rpm 0.5m @ 45 degrees from exhaust.The regs says 20m drive by but what full chat or cruzing ? |
 Posted 11th Mar 2016 at 16:33
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Chr1sch
Seasoned Pro  Location: Worcester Registered: 02 Aug 2014 Posts: 1,025 Status: Offline |
Post #2
Bloody hell - 101 static is LOUD! although you would expect lower on drive by at distanceMy magnex with a cat is 89 static, and didnt trip anything at Bedford (or anywhere near) and they are notoriously tight |
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Posted 11th Mar 2016 at 16:43
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ravemercer
Regular Location: kent Registered: 18 Jan 2009 Posts: 422 Status: Offline |
Post #3
it's a nice kinda loud  its high boost with a a decat straight through mid 2 1/4 and remus backbox so its fairly quiet on the mway @ 60 mph tbh just peaky when reved. |
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Posted 11th Mar 2016 at 16:53
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demondriverdan
Seasoned Pro  Location: Londinium Registered: 29 Nov 2010 Posts: 2,665 Status: Offline |
Post #4
They have microphones at several places around the circuit and will measure your noise as you go past regardless of whether you're at full chat or cruising. My car is around 95db static but trips the drive by sometimes due to the throttle bodies and exhaust popping. If you trip it you get 1 attempt to fix the car, if you trip it a second you're not allowed back out on track again. You can buy extra silencers / plates that go on the end of the exhaust to bring the noise down ________________________________________ Rallye Race Car |
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Posted 11th Mar 2016 at 17:03
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ravemercer
Regular Location: kent Registered: 18 Jan 2009 Posts: 422 Status: Offline |
Post #5
Ok cheers ill test it at different rpms then. I will be getting a exhaust made up soon so will see what db its producing at 20m first then decide if I'm going to stick in another box in the mid section. |
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Posted 11th Mar 2016 at 17:20
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demondriverdan
Seasoned Pro Location: Londinium Registered: 29 Nov 2010 Posts: 2,665 Status: Offline |
Post #6
Static testing is fine but it's different when the car is under load or you're actually driving it. I have no problem with the static noise tests but when I heel and toe down it can trip the drive by limit.If you are worried I would pick up an extra exhaust silencer before going to the trackday, something like this: https://www.merlinmotorsport.co.uk/p/merlin-mild-steel-racing-muffler-m-ex-muff-4 If you have no problems on the day you can always return it but I'm sure you'd prefer to have a backup option if you do have issues. I've learnt to do a bit of lift and coast at certain points of the track to help the noise out  ________________________________________ Rallye Race Car |
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Posted 11th Mar 2016 at 17:26
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ravemercer
Regular Location: kent Registered: 18 Jan 2009 Posts: 422 Status: Offline |
Post #7
Ok thanks for the sound advice. Ill replicate the conditions best I can actually driving past in a suitable location at 20m I've got a cheap sound tester it's fairly accurate. If I'm close to 92db ill defiantly be putting a midbox on. I've almost made my mind up of the exhaust setup now I will be putting in a fia 100 cell jettex sports cat so will reduce the noise with that. Is there a certain point in the revs you would say it reaches its peak sound 5500rpm etc or would you say higher the revs higher sound all the way to 7500 ? |
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Posted 11th Mar 2016 at 18:15
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RetroPug
Seasoned Pro  Location: Leicestershire Registered: 15 Jan 2013 Posts: 2,473 Status: Offline |
Post #8
Removing the midbox on most stainless systems doesn't seem to increase the overall volume too much, but it does significantly increase the booming reasonance that you tend to get around 3000rpm or so, which does significantly increase volume at that point.The volume at idle and under most driving conditions seems to be almost entirely affected by the rear silencer on a standard engine from my experience. ________________________________________ 61k miles Ph.1 Diablo '6 Project Thread |
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Posted 11th Mar 2016 at 18:55
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welshpug!
Capt Pedantic  Location: Bigend, Wales. Registered: 27 Mar 2007 Posts: 25,817 Status: Offline |
Post #9
is your name stan too?  ________________________________________ need a part number? get on here - http://public.servicebox.peugeot.comBring on the Trumpets. |
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Posted 11th Mar 2016 at 19:21
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aaron6
Seasoned Pro  Location: On the sofa in maidstone Registered: 16 May 2006 Posts: 5,840 Status: Offline |
Post #10
3k revs on track? Don't think mine went below 5k at brandshatch. ________________________________________ See the sheer power and might of the lesser known burrowing owl. |
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Posted 11th Mar 2016 at 19:45
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ravemercer
Regular Location: kent Registered: 18 Jan 2009 Posts: 422 Status: Offline |
Post #11
ha ha no its dave isn't his like 130+ that's a whole another level of noise I just like the sound don't want to reduce flow and make it quite. I know there's a balance but I don't mind being on the 100 db side of it On the back box side the remus is a reverse flow/chamber like the o.e so it does a good job keeping it quiet at lows revs until its booted it's more restrictive than a absorption type box hence I don't want really want a mid pipe on. |
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Posted 11th Mar 2016 at 19:59
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RetroPug
Seasoned Pro Location: Leicestershire Registered: 15 Jan 2013 Posts: 2,473 Status: Offline |
Post #12
aaron6 wrote: 3k revs on track? Don't think mine went below 5k at brandshatch. Of course not 3k revs on track. I'm just discussing what resonance the midbox in the std. system typically eliminates, and what the effect of removing it would be. Which is basically lots of boom but only at very specific places in the rev range, and a nice change in tone everywhere else. I can't remember specifically what rpm this occurs at but typically 40mph in 6th, especially under load. How is the remus? I've always wanted to try one out. I have a scorpion rear silencer at the moment which seems to be pretty much straight through with some perforated/baffled tubing. ________________________________________ 61k miles Ph.1 Diablo '6 Project Thread |
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Posted 11th Mar 2016 at 21:17
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fatlapit
Seasoned Pro  Location: STOCKSFIELD Registered: 02 Nov 2010 Posts: 3,040 Status: Offline |
Post #13
Flowmaster boxes ftw if your stuck. A box is no good if you can see through it.________________________________________ |
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Posted 11th Mar 2016 at 21:28
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stan_306gti6
Forum Admin Location: Kent Registered: 18 Jan 2004 Posts: 21,768 Status: Offline |
Post #14
132dB for me as a static test - with Devil Decat, bespoke straight through centre section and Magnex 4" back box...it works for me... ________________________________________ "Supercharged - 454.1bhp/317.5lb/ft"Peugeot 306 GTi-6 2000 (X), Moonstone  |
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Posted 11th Mar 2016 at 22:15
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ravemercer
Regular Location: kent Registered: 18 Jan 2009 Posts: 422 Status: Offline |
Post #15
did you used zero exhausts to make your pipe ? |
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Posted 12th Mar 2016 at 08:50
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stan_306gti6
Forum Admin Location: Kent Registered: 18 Jan 2004 Posts: 21,768 Status: Offline |
Post #16
I most certainly did sir, couldn't recommend enough.  ________________________________________ "Supercharged - 454.1bhp/317.5lb/ft"Peugeot 306 GTi-6 2000 (X), Moonstone |
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Posted 12th Mar 2016 at 10:07
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welshpug!
Capt Pedantic Location: Bigend, Wales. Registered: 27 Mar 2007 Posts: 25,817 Status: Offline |
Post #17
stan_306gti6 wrote: I most certainly did sir, couldn't recommend enough. I wouldn't, they royally f**ked yours up!!! ________________________________________ need a part number? get on here - http://public.servicebox.peugeot.comBring on the Trumpets. |
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Posted 12th Mar 2016 at 17:30
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roland rat
Yeeeah Rat fans!  Location: Swansea Registered: 29 Nov 2006 Posts: 22,282 Status: Offline |
Post #18
stan_306gti6 wrote: 132dB for me as a static test - with Devil Decat, bespoke straight through centre section and Magnex 4" back box...it works for me... Would only be a static test as it never goes anywhere  |
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Posted 12th Mar 2016 at 19:22
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ravemercer
Regular Location: kent Registered: 18 Jan 2009 Posts: 422 Status: Offline |
Post #19
Will be paying him a visit next couple weeks last time I spoke to him was booked up for months .Did he mandrel bend and flair your pipe no cutting and welding ? Does it resonate atall being straight through ? |
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Posted 14th Mar 2016 at 10:48
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stan_306gti6
Forum Admin Location: Kent Registered: 18 Jan 2004 Posts: 21,768 Status: Offline |
Post #20
welshpug! wrote: stan_306gti6 wrote: I most certainly did sir, couldn't recommend enough. I wouldn't, they royally f**ked yours up!!! Hardly, I asked for a pipe to be made the exact same as my Magnex centre section but without the box. I knew it would be noisy and it is. Job completed all for under £100 too. Meirion your extensive knowledge on here is invaluable but there's no need for your constant sarcasticness...  ________________________________________ "Supercharged - 454.1bhp/317.5lb/ft"Peugeot 306 GTi-6 2000 (X), Moonstone |
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Posted 14th Mar 2016 at 15:43
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stan_306gti6
Forum Admin Location: Kent Registered: 18 Jan 2004 Posts: 21,768 Status: Offline |
Post #21
ravemercer wrote: Will be paying him a visit next couple weeks last time I spoke to him was booked up for months . Did he mandrel bend and flair your pipe no cutting and welding ? Does it resonate atall being straight through ? He did indeed mandrel bend it. No flaring as mine is a sleeve fitment. It resonates a bit, makes the exhaust pop and bang on the overrun and is generally very loud. Just what I wanted to be honest as not interested in track these days. And Roland, I'll have you know the car does get driven, as recently as January this year. Will also be taken abroad later this year too.  ________________________________________ "Supercharged - 454.1bhp/317.5lb/ft"Peugeot 306 GTi-6 2000 (X), Moonstone |
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Posted 14th Mar 2016 at 15:46
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welshpug!
Capt Pedantic Location: Bigend, Wales. Registered: 27 Mar 2007 Posts: 25,817 Status: Offline |
Post #22
stan_306gti6 wrote: welshpug! wrote: stan_306gti6 wrote: I most certainly did sir, couldn't recommend enough. I wouldn't, they royally f**ked yours up!!! Hardly, I asked for a pipe to be made the exact same as my Magnex centre section but without the box. I knew it would be noisy and it is. Job completed all for under £100 too. Meirion your extensive knowledge on here is invaluable but there's no need for your constant sarcasticness... your exhaust puts the whole 306 world to disrepute, I don't understand how someone can think that 131 db is cool, respectable, its plain downright rude and antisocial. ________________________________________ need a part number? get on here - http://public.servicebox.peugeot.comBring on the Trumpets. |
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Posted 14th Mar 2016 at 16:13
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stan_306gti6
Forum Admin Location: Kent Registered: 18 Jan 2004 Posts: 21,768 Status: Offline |
Post #23
It's that noisy at a static test though at 3/4 revs, it's not that loud at idle or low rpm when it's being used.Yes, start using the loud pedal rather hard and it is extremely noisy - but there's a time and a place and I'm always respectful of that. ________________________________________ "Supercharged - 454.1bhp/317.5lb/ft"Peugeot 306 GTi-6 2000 (X), Moonstone |
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Posted 14th Mar 2016 at 16:17
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ravemercer
Regular Location: kent Registered: 18 Jan 2009 Posts: 422 Status: Offline |
Post #24
Ok good when I've got the midpipe on we could meet up outside a retirement home @12am we can find out who's is louder see if we can rattle some teeth loose. :O |
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Posted 15th Mar 2016 at 10:01
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