Mad WRX

Hi everyone, my car's got a turbo back exhaust and a cold air induction, it has been re mapped by Duncan at Racedynamix. Would my car pass an mot emissions test? Thank you in advance.

chaffe

iTrader: (1)

most exhausts are from the turbo back, do you mean you have removed the cat? if so then no, it wont pass an emmisions check, the co and hydrocarbons will be too high

Mad WRX

Hi, sorry I forgot to say the cat's been removed. Thanks for you advice.

dan2926

iTrader: (4)

No mate, just had same problem with mine had to fit a cat for the mot. Some garages will do it but will probably fail other things to compensate it. Better fitting a cat then taking her off again afterwards
My blob was only running with the 2nd cat in and passed mot no problem.

Mad WRX

Will the original centre section fit a 3" cat back pipe?

WRXSJM

Just got a sports cat on my bugeye (removed the other two) passes without issue..

chaffe

iTrader: (1)

manufacturers need three cats to pass emmissions at all load/engine revs. The mot is done light load at idle and 2000 rpm, you dont need much of a cat to pass under those conditions. As long as the Afr is pretty close to 14.7:1, giving as near as lambda1 as possible.

Boosty

just find a nice MOT tester to put the stick jobbie into the exhaust of another passing car - like a mini or something if they ever got in trouble, just say you bought thr exhaust system after the mot.

simples

chaffe

iTrader: (1)

what about random roadside VOSA checks? that void the mot

Pramas

lol thats me screwed then

chaffe

iTrader: (1)

just a though as a subaru with a big spoiler and loud exhaust is a prime target for roadside checks

MattyB1983

iTrader: (51)

Slipping £30 under the counter usually helps with emissions test.
Not that I do that ofcourse.

Pramas

if stopped could always say youve just started your journey, cats dont work well until hot.

s70rjw

iTrader: (2)

Has anyone been subject to one of these?
Not a mate who said he had been subject of one, but personal experience of being stopped and having the decatted exhaust tested?

classicgc8

iTrader: (4)

new mot rules in soon,cat must be fitted at time of mot test if one was fitted as standard ,even if it passes emmisions
should be fun for us testers as that coupled with loads of new testable items as well .cant wait for all the appeals

steviefastbikes

Inner cv boots fr & rr balljoint dustseals airbag light traction light. Etc it's getting crazy. I am beginning to think I am in wrong job. Lol

chaffe

iTrader: (1)

I think they would wait the ten mins while it started to flash off, you can see the hydrocarbons starting to drop and co dropping, you will know if it has a cat.
Really? that rule excists just now. or do you mean pre 1993 cars that had OE cats will need them for a test? dont think that will effect many people
fr&rr? lol