How loud is your Exhaust. my Milltek is...
15 July 2006, 10:38 PM
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How loud is your Exhaust. my Milltek is...
Just had a trip to PowerStation for a tune up. 
now has a 3" Milltek exhaust comprising...
straight thru downpipe.
sports CAT and silencer center
backbox with 4" tip.
I am really concerned about the noise (track days/police)
This is suppose to be one of the more quite systems as well!
just measured db tonight.
at 1m, 45deg away from exhaust at idle its 94-96db.
Is this loud ?
Is this whats meant by a static test ? (or do i need to rev to @4500rpm, becuase this will be well over 100db)
now has a 3" Milltek exhaust comprising...
straight thru downpipe.
sports CAT and silencer center
backbox with 4" tip.
I am really concerned about the noise (track days/police)
This is suppose to be one of the more quite systems as well!
just measured db tonight.
at 1m, 45deg away from exhaust at idle its 94-96db.
Is this loud ?
Is this whats meant by a static test ?
(or do i need to rev to @4500rpm, becuase this will be well over 100db)
15 July 2006, 10:46 PM
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when they check for trackdays you have to check at a certain rpm can't remember what, or some are at driveby.
My Blitz Nur Spec R with decat came back at 110db and it's been on 3 years with no problems at all so i wouldn't worry
My Blitz Nur Spec R with decat came back at 110db and it's been on 3 years with no problems at all so i wouldn't worry
15 July 2006, 11:00 PM
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im getting a full afterburner vortex system soon (moneys pending) from www.scoobyworld.co.uk comprising of backbox decat centre and downpipe. will that be a noisy beast? also would it be worth buying a "cat centre?" for those pesky m.o.t.'s to keep terence treehugger happy.
15 July 2006, 11:02 PM
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http://www.airpowersystems.com.au/us...wrx-hoe-r1.htm
just had a look at a similar exhaust (APS 3" with 4"tip) . reading the link says that this at 4500rpm only produces 93db with CAT.
I think I will call Powerstation up on Monday.
just had a look at a similar exhaust (APS 3" with 4"tip) . reading the link says that this at 4500rpm only produces 93db with CAT.
I think I will call Powerstation up on Monday.
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15 July 2006, 11:03 PM
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Originally Posted by bob r
vortex b/b with decat centre and still not loud enough
<not mistaking youthful exuberance with chavness
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15 July 2006, 11:08 PM
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Originally Posted by chocolate_o_brian
what downpipe you got bob r? ^^^ im after the vortex tooo, want something to scare people with.
<not mistaking youthful exuberance with chavness >
<not mistaking youthful exuberance with chavness
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15 July 2006, 11:11 PM
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Originally Posted by bob r
standard d/pipe unfortunately but thinking of getting a sports cat soon.
. only reason i want a full ststem is that im getting a rattling noise if i speed up from a low speed in a high gear ie. 20mph in 3rd. maybe its my heatshield, sounds really tinny and i want it to stop and get ripped off
.
16 July 2006, 11:13 AM
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Static tests normally done at 4/5Krpm
We testing 10 cars near my home before Bedford Autodrome
6 would pass static tests but only 2 would pass driveby test
1 car failed Static but would have passed Driveby test
Noise is a strange thing can be effected by weather(Atomospheric cond.) and readings taken at Bedford didn't compare to ours
Because of VVT technology most are turning to a % of full Revs and backed up by Driveby tests
BTW My Miltek sounds awesome 
fairly quiet till your giving it some
Tony
We testing 10 cars near my home before Bedford Autodrome
6 would pass static tests but only 2 would pass driveby test
1 car failed Static but would have passed Driveby test
Noise is a strange thing can be effected by weather(Atomospheric cond.) and readings taken at Bedford didn't compare to ours
Because of VVT technology most are turning to a % of full Revs and backed up by Driveby tests
Originally Posted by BEDFORD AUTODROME
At Bedford Autodrome we have two noise tests. First your car will be subjected to a static test, in which the noise level is measured 50cm away from your exhaust pipe with the engine at 75% of maximum rpm. The reading must not exceed 101 dB(A).
Secondly, and more significantly, your car must comply with our drive-by noise limits. The noise emission from your car must not exceed 87 dB(A) measured 20 metres from your car, which shall be accelerating maximally at over 60 mph.
Secondly, and more significantly, your car must comply with our drive-by noise limits. The noise emission from your car must not exceed 87 dB(A) measured 20 metres from your car, which shall be accelerating maximally at over 60 mph.
fairly quiet till your giving it some Tony
16 July 2006, 11:31 AM
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Powerstation have a directional tail pipe bung for exhausts which will significantly improve trackday noise tests
Noise is a very differcult thing to measure for trackdays. At last years Tuner GP we had problems with Donnington’s on track noise equipment; although we cruised through the static test we would trigger them on full throttle.
We had a customer with a similar problem at Donnington with his Spec C but when he fitted the bung it passed comfortably. Did not feel like it robbed power either
Anyone that has heard our race Type-25 will know how quiet it is but from certain angles it used to trigger the noise metres. Milltek have worked on improving this and their new bung is one of the options we have. We know that the Milltek is one of the most quiet systems (especially 3") on the market as we have test most of the others.
Iain
Noise is a very differcult thing to measure for trackdays. At last years Tuner GP we had problems with Donnington’s on track noise equipment; although we cruised through the static test we would trigger them on full throttle.
We had a customer with a similar problem at Donnington with his Spec C but when he fitted the bung it passed comfortably. Did not feel like it robbed power either
Anyone that has heard our race Type-25 will know how quiet it is but from certain angles it used to trigger the noise metres. Milltek have worked on improving this and their new bung is one of the options we have. We know that the Milltek is one of the most quiet systems (especially 3") on the market as we have test most of the others.
Iain
Last edited by LitchfieldImports; 16 July 2006 at 11:33 AM.
16 July 2006, 01:40 PM
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Originally Posted by Takumi
just measured db tonight.
at 1m, 45deg away from exhaust at idle its 94-96db.
Is this loud ?
Is this whats meant by a static test ? (or do i need to rev to @4500rpm, becuase this will be well over 100db)
at 1m, 45deg away from exhaust at idle its 94-96db.
Is this loud ?
Is this whats meant by a static test ?
(or do i need to rev to @4500rpm, becuase this will be well over 100db)
Originally Posted by LitchfieldImports
Powerstation have a directional tail pipe bung for exhausts which will significantly improve trackday noise tests
How much is it ??
Originally Posted by LitchfieldImports
Anyone that has heard our race Type-25
waits for reply.........deadly silence LOLTony
16 July 2006, 11:26 PM
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Thanks Iain
I will have a chat with Powerstation regarding the bung.
But also want to check that the downpipe fitted definitely had a resonator and was not straight thru.
I know the center had a CAT + resonator, but didnt see any sign of a resonator on the dp when being fitted.
I just cant believe Im putting out 96dB at idle.
I will have a chat with Powerstation regarding the bung.
But also want to check that the downpipe fitted definitely had a resonator and was not straight thru.
I know the center had a CAT + resonator, but didnt see any sign of a resonator on the dp when being fitted.
I just cant believe Im putting out 96dB at idle.
17 July 2006, 11:48 AM
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Originally Posted by chocolate_o_brian
im getting a full afterburner vortex system soon (moneys pending) from www.scoobyworld.co.uk comprising of backbox decat centre and downpipe. will that be a noisy beast? also would it be worth buying a "cat centre?" for those pesky m.o.t.'s to keep terence treehugger happy.
Ive got a MY00 with a H&S AB Vortex full de-cat system and in my opinion its very loud, ive been driving another car and let someone overtake me in my car and it sounds like a jet engine, its cracks and pops like gun-fire when you give the throttle a tiny tap. There are louder systems than this thou.
Im getting a Prodrive BB this week, having a break from all the noise! The de-cat downpipe make the turbo spool up swooosh louder, this I like a lot!
I would recommend getting the set up thou, makes every drive a total blast.......literally!
17 July 2006, 12:28 PM
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i'm very happy with my milltek system - its pretty quiet when just taking it easy - but makes the car sound like a crazy 1000c motorbike when on full chat
17 July 2006, 12:41 PM
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Originally Posted by chocolate_o_brian
im getting a full afterburner vortex system soon (moneys pending) from www.scoobyworld.co.uk comprising of backbox decat centre and downpipe. will that be a noisy beast? also would it be worth buying a "cat centre?" for those pesky m.o.t.'s to keep terence treehugger happy.
Not sure if you can get a bung for the Vortex BB, but i got one for the Ninja for the motorways, £35.
17 July 2006, 01:37 PM
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Originally Posted by GazTheHat
Got AB full decat, but Ninja BB. It is loud. But the howl on full throttle outways the drone. Not sure if you can get a bung for the Vortex BB, but i got one for the Ninja for the motorways, £35.
Not sure if you can get a bung for the Vortex BB, but i got one for the Ninja for the motorways, £35.Did you get it from Hayward & Scott?
Rob
17 July 2006, 02:29 PM
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spoke to Rich at powerstation and it turns out that only the Jap twinscrolls can have a milltek resonated downpipe. My UK STI wont be resonated. Oh no! Noise probably isn't a problem on Jap spec cars plus also has no burble ?
Any others with milltek 3" on a UK machine?
Anyway, Rich at Powerstation will be looking at it again to see if the milltek exhaust needs repacking. Fingers crossed as its just too loud. I hope this and may be the bung will sort things out. My wife will be giving me an ear full if the exhaust dosent make me deaf before.
Any others with milltek 3" on a UK machine?
Anyway, Rich at Powerstation will be looking at it again to see if the milltek exhaust needs repacking. Fingers crossed as its just too loud. I hope this and may be the bung will sort things out. My wife will be giving me an ear full if the exhaust dosent make me deaf before.
17 July 2006, 04:18 PM
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Originally Posted by scoobfan
I'm considering a bung for my Ninja, do you find it any good.
Did you get it from Hayward & Scott?
Rob
Did you get it from Hayward & Scott?
Rob
Yeah, got it from H&S £35.
I only bought it for long journeys or for when the wife drives it (which is all the time). But i hoped she would get used to it, and it seems she has!
17 July 2006, 04:20 PM
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Originally Posted by Takumi
spoke to Rich at powerstation and it turns out that only the Jap twinscrolls can have a milltek resonated downpipe. My UK STI wont be resonated. Oh no! Noise probably isn't a problem on Jap spec cars plus also has no burble ?
Any others with milltek 3" on a UK machine?
Anyway, Rich at Powerstation will be looking at it again to see if the milltek exhaust needs repacking. Fingers crossed as its just too loud. I hope this and may be the bung will sort things out. My wife will be giving me an ear full if the exhaust dosent make me deaf before.
Any others with milltek 3" on a UK machine?
Anyway, Rich at Powerstation will be looking at it again to see if the milltek exhaust needs repacking. Fingers crossed as its just too loud. I hope this and may be the bung will sort things out. My wife will be giving me an ear full if the exhaust dosent make me deaf before.
17 July 2006, 05:23 PM
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Originally Posted by *Nate*
I have a Full H&S decat on a 2001 WRX, produces 110 Db, with the bung 99 Db, but got pulled from Japfest track session in 2005 for a drive by 107 Db with bung 
Nate.
Nate.
17 July 2006, 06:21 PM
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Originally Posted by chocolate_o_brian
im getting a full afterburner vortex system soon (moneys pending) from www.scoobyworld.co.uk comprising of backbox decat centre and downpipe. will that be a noisy beast? also would it be worth buying a "cat centre?" for those pesky m.o.t.'s to keep terence treehugger happy.
17 July 2006, 07:29 PM
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Originally Posted by GC8
Most JDM Imprezas up to and including MY'95 cars dont require a catalytic convertor. This depends how theyre registered, but most are down as 'Subaru Saloon' or Subaru Impreza Estate' or similar. If the MOT tester can find exact emissions limits for those un-specified 'models' then he's a better man than me.....
believe it or not gc8 mines 95 wrx is down as a 1994cc 4wd lx. now we all know subaru only made the lx in a 2wd 1.6l engine... how would i far when it comes to mr mot tester? if i had a full decat system.