No CAT...

The car is defo really lively in the rev limiter... when it hits the redline it just gives a massive boost in performance... makes the car very revvy :D
 
You'd have to run a lot of boost to free up 150bhp, would be impressive :D
Ive heard of 50bhp from filter and exhaust change on a jap turbo car, cant remember which one it was

decat will mainly improve response, so thats more torque then any bhp gain. In theory it added 10mph to my top speed but I know the car just needed a longer run up with a more restrictive exhaust, it wasnt actually that much more powerfull.
It will make it more fun but dont count on any power unless you are driving a beast with a cork in it :p
 
Doubt the gains are anything like 8-10 BHP, you'll probably find it a bit more responsive though.

If the car was registered before August '95 you'll be able to get a non-CAT test for the MOT. Bear in mind you've got to pass the emissions test though ;)
 
Nozzer said:
However there is some discussion about whether, if a car that is supposed to have a cat can pass the MOT without it, and nobody notices its missing at test time, the car may be deemed roadworthy...
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The test does not check for the presence of a cat, it merely states that if the car is manufactured after whenever (the date cats were fitted to all cars, 1992?) it must take the more stringent cat test, cat or no cat iirc, could be wrong tho.
 
Leeum said:
If the car was registered before August '95 you'll be able to get a non-CAT test for the MOT. Bear in mind you've got to pass the emissions test though ;)
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Its a 2002 Mondy ST220 And i have a "non-CAT" certificate :)
 
Ev0 said:
The test does not check for the presence of a cat, it merely states that if the car is manufactured after whenever (the date cats were fitted to all cars, 1992?) it must take the more stringent cat test, cat or no cat iirc, could be wrong tho.
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Yes, they must test the car as if a cat. was present, although if it fails the emissions test, they'll almost certiainly go looking for the cat., and remember for next time you take it in :).
 
Yeah it does depend on the year the car was made. For example we fitted a decat pipe a while ago on a Rover 220 Turbo as it was made when the cats were only experimental on them, apparently.
Also just today we fitted a stainless system to a 1995 FTO for someone which removed the cat, apparently it doesn't actually require the cat on that model year. :)
 
tb2000 said:
Yeah it does depend on the year the car was made. For example we fitted a decat pipe a while ago on a Rover 220 Turbo as it was made when the cats were only experimental on them, apparently.
Also just today we fitted a stainless system to a 1995 FTO for someone which removed the cat, apparently it doesn't actually require the cat on that model year. :)
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people are saying 92 when your statment shows a 1995 FTO with no cat and my 2002 mondy is fine... :)
 
Nozzer said:
Yes, they must test the car as if a cat. was present, although if it fails the emissions test, they'll almost certiainly go looking for the cat., and remember for next time you take it in :).
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Yeha some motors are lucky enough to still pass with no cat, vaguely remember someone on here passing ages and ages ago with no cat.
 
My mini, first registered on the 28th of august 1992, didnt come with a catalytic convertor from the factory, and VOSA dont have it on their list, so i can have some fun with aftermarket exhausts :D..

Best thing to do if you're thinking about De-Catting your motor is ask your local MOT bloke to check his list for you :p

1992 cars, some are required to have a cat, some arent.. independant of what end of the year they were supposedly required to (which i believe is august 1st - could be wrong though)

As for power gains, they are minimal, especially if you're keeping the exhaust at a standard bore... it might be slightly more responsive due to its new found ability to breathe.. but it wont be much unless you up the bore.. that is of course assuming your cat wasnt utter rubbish
 
merlin said:
I've informed my insurers of my decat (in an around about way).

The exhaust is non standard, and with no cat it's performance enhancing - so I disclosed it.
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Me too, Ive told them I have a complete stainless exhaust system from the turbo back.
 
If you get a car made back in 1986 and then you put in an engine from 1994-1996 then do you need a cat? :p
 
the cat does most of its work on a cold engine, as long as the engine is running ok and is warm (mot test equipment tests for warm engine iirc) then the cr should go through fine with no cat.
 
Iam pretty sure the cat itself has to warm up, before its done a few miles it does not filter properly anyway.

They had to bring in cats because unleaded fumes can be so much more lethal then leaded fumes I read, kinda ironic
 
Zip said:
If you get a car made back in 1986 and then you put in an engine from 1994-1996 then do you need a cat? :p
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Over here, no. I was under the impression that down under it's a fairly hefty offence to tamper with the emissions system.

Although I'm probably wrong as I have been on everything else in this thread :)
 
Nozzer said:
Over here, no. I was under the impression that down under it's a fairly hefty offence to tamper with the emissions system.

Although I'm probably wrong as I have been on everything else in this thread :)
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Im unsure as of yet, ill have to look into it :o
 
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