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Bhp or Beefy Sounds...
User avatar
By Shappers
#3053340
After fitting an unsilenced B pipe (standard manifold and BB), and having someone do some fly bys with my car, was a bit worried about the sound levels the car is producing (especially on the overrun). Having done some research online (and reading this very useful page!) http://www.the-ace.org.uk/loud-exhausts-cost-cash.html it seems the legal limit some police forces are using is 90db as ‘legal’… which means the standard car (at 93db) would fail a legality test with the police. Anyone know what difference the unsilenced B pipe would likely make to this test, I don’t see just a 2.5” unsileneced pipe with everything else standard listed.

Has anyone had any grief from the police/MOT testers?
User avatar
By Darkhawk
#3057646
Got my mate out today with a decibel meter

Didn't manage to get a drive by but did a few stood still runs

At 3.5k 103.2 db
At 4k 112.3 db ( on launch control/limiter)

Really wanna see what it is at 9k :twisted: it's so much louder haha I reckon 120 ish


Mugen manifold
Decat
Custom 2.5" b pipe
Hks high power back box
User avatar
By Bud
#3061066
teagie89 wrote:Anyone know DC mani with a DC catback system?
I have this, i recon its in the region of 105-110db on full chat.
User avatar
By Josh1921
#3064223
r8byb wrote:Just to add to this, my silenced B pipe with a Spoon N1 is 95db driveby MAX :bigthumb:
Really? I got 96db at 5k revs with your unsilenced bpipe and oem back box? I thought the spoon would be a lot louder, even if it's a silenced middle?
User avatar
By sendai
#3074854
for street using I finally coupled the oem back box with BuddyClub ProSpec 65mm b-pipe/KiddRacing header.
The sound is quite like oem, no rasp (strange). I had to adjust a bit the fuel.

( I also used the oem b-pipe and KiddRacing header and that will need more fuel adjustents cause it will run rich)
User avatar
By kaner.eb
#3143252
r8byb wrote:Just to add to this, my silenced B pipe with a Spoon N1 is 95db driveby MAX :bigthumb:
so this is way quiter than std std spoon ?
User avatar
By MilanoEP3
#3156149
Add to list...
Standard Mani.Supersprint unsilenced centre.Spoon N1 - 107db

was tested at oulton few days ago at trackday.

fortunately had my oem backbox with me as they wouldnt let me on. (105db limit).

swaped the spoon n1 back on when the plebs had jibbed off and released hell :twisted:

sounded like a touring car with my brother drivin it down start finish... :bigthumb:
User avatar
By Bud
#3172991
teagie89 wrote:Only using a phone app my car came out as 140dB!!! Japspeed main with DC system. :twisted:
:lol:

So your cars louder than a 747 on take off
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