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2wd 4" Scorpion backbox too loud for MOT

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Old May 5, 2012 | 12:17 PM
  #1  
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Default 2wd 4" Scorpion backbox too loud for MOT

hmm funny thing is it passed in the same garage last year.. when i took it the tester said hmm bit loud that! someone else said "oh its supose to sound like that!" its a cosworth..!

I have the middle box removed so that probly dont help. so now want to find a backbox thats quieter, or replace the whole lot.. would like the look of the original backbox if i can get it to fit the 3" system with an adapter! anyone know who sells an orignal looking backbox, lookin on feebay now see if anythings about.
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Old May 5, 2012 | 06:12 PM
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just have a middle box welded back into the system.. even done by a garage shouldnt cost much and even better if you can do it yourself..
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Old May 5, 2012 | 06:29 PM
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What a load of bob noise doesn't even come in to the test tell him to eat shit & die.
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Old May 5, 2012 | 06:36 PM
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I have the same setup on mine and just got this...


Just take it somewhere else to be mot'd mate
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Old May 5, 2012 | 06:36 PM
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Originally Posted by baggy1979
What a load of bob noise doesn't even come in to the test tell him to eat shit & die.
an mot tester has the power to fail a car for excessive exhaust noise, i think i read that 101 decibels is the limit.
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Old May 5, 2012 | 06:54 PM
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It's all a bit pathetic though really as Harley Davidson bikes and Lamborghini cars are far louder but are ok as they were made like it, think they have the ability to fail if it is significantly louder than what they perceive a standard car of that type to sound like, think with new mot from this year and probably more to add to it in near future us petrol heads are in for a hard time.
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Old May 5, 2012 | 06:58 PM
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Originally Posted by bigluke200
I have the same setup on mine and just got this...

Just take it somewhere else to be mot'd mate
Luke do you still have the Scorpion or did you change rear box due to restriction?

yours was mega noisey - i remember being behind yours on the way to central day and yours it was drowning mine out
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Old May 5, 2012 | 07:06 PM
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mine was loud even with a middle box in so i got a new magnex twin box centre section and mated it up to my original mongoose system and is so much nicer to drive now.. used to rattle the pictures on the wall in the house when ticking over on the driveway.. even better was the magnex is brand new and cost 40 quid..
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Old May 5, 2012 | 07:11 PM
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they have to compare the noise level to the same car fitted with a standard system to determine if it's noisey
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Old May 5, 2012 | 07:14 PM
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noise is at testers discretion, take it somewhere else m8
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Old May 5, 2012 | 07:16 PM
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Originally Posted by BRAMMER
Luke do you still have the Scorpion or did you change rear box due to restriction?

yours was mega noisey - i remember being behind yours on the way to central day and yours it was drowning mine out
Haha, I remember that like it was yesterday mate
I've still got the scorpion system but simply swapped the back box for a newer, non- restrictive scorpion one. It doesn't scream like it used to on boost but I think it's probably louder now
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Old May 5, 2012 | 08:16 PM
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this is just the mot tester being a tool just took my 2.9 xr4x4 in for mot this week and that is running a single box scorpion system which is bloody loud but flew through with it no problems
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Old May 5, 2012 | 09:50 PM
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I get an advisory with a five turbo side exit....
Take it somewhere else if I were you.
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Old May 5, 2012 | 09:58 PM
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TVR's dont have a problem! They can set of car alarms, fuck it keep it!
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Old May 5, 2012 | 10:04 PM
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I had a fail on my old Integrale with a Group A exhaust with NO silencers so I took it somewhere else That thing was so fucking loud with no silencers that you could hear it from a mile away!
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Old May 6, 2012 | 09:23 AM
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My Saff had this setup for years, yeah it's pretty loud, but I liked it. Try just taking it somewhere else first
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Old May 6, 2012 | 09:59 AM
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Originally Posted by baggy1979
What a load of bob noise doesn't even come in to the test tell him to eat shit & die.
you clearly don't know your arse from your elbow.

Information

Method of Inspection

Reason for rejection
The overall security of the exhaust system should be assessed; one or more exhaust mountings missing may not be a Reason for Rejection.

A durable repair to an exhaust system which effectively prevents leaks is acceptable providing the system is structurally sound.

A minor exhaust leak from, for example, a connection joint or a pin hole, is not a Reason for Rejection.

1. Check the security of the exhaust system.

2. With the engine running, check the exhaust system for leaks.

3.On vehicles that qualify for a full cat emissions test, check the presence of the catalytic converter.

4. During all parts of the emissions test relevant for the vehicle, assess subjectively the effectiveness of the silencer in reducing exhaust noise.
Note: For vehicles not subject to an emissions test, the engine should be revved to around 2500rpm or approximately half maximum engine speed if this is lower.

5. On Class 5 vehicles only, check that the exhaust tailpipe is positioned so it is unlikely that fumes will enter the driver’s or passenger area.


1. An exhaust system not adequately supported.


2. A major leak of exhaust gases from any part of the system.

3. A catalytic converter missing where one was fitted as standard


4. A silencer in such condition, or of such a type, that the noise emitted from the vehicle is clearly unreasonably above the level expected from a similar vehicle with a standard silencer in average condition.




5. An exhaust tailpipe positioned so that fumes are likely to enter the driver’s or passenger area.
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Old May 6, 2012 | 10:14 AM
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If anyones got an old style 4" scorpion backbox with the "restrictor" inside i may be interested
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Old May 6, 2012 | 11:44 AM
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Sean I have but I want the non restrictive 1
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