Sly_SRi
Premium Member
Registered: 9th Apr 04
Location: Reading, UK Drives: Corsa C
User status: Offline
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I was wondering what catalytic converters people use on turbo cars that have been modified?
My current Corsa has a de-cat exhaust which I'm going to need to change before Mot time...so I was wondering whether a standard Astra cat would be okay or will I need a high-flow cat in order to keep the Bhp figures up..?
Also the bore is 3" which is obviously larger than standard..
So was wondering what other people run on theirs?
Thanks
Corsa C Z20Let
Black Sleeper Turbo Project
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Gary
Premium Member
Registered: 22nd Nov 06
Location: West Yorkshire
User status: Offline
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Bodge summut in for MOT then whip it off afterwards
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*CorsaCal*
Member
Registered: 3rd Oct 10
Location: Leicestershire Drives: 20XE Corsa
User status: Offline
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On my XE I use the standard 1.4 corsa cat. Passed MOT (just)
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monkeytwizzel
Member
Registered: 10th Aug 11
Location: Chard, Somerset
User status: Offline
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Any cat that is a 200 cell(sports cat/hi flow) with the pipe diameter to match your system will be best,apart from not runinng a cat.
400 cell cat is your standard type,there`s always a few astra gsi cats about from people that have upgraded to sports systems as the first thing they do is to remove one of the two cats.
[Edited on 15-03-2014 by monkeytwizzel]
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Sly_SRi
Premium Member
Registered: 9th Apr 04
Location: Reading, UK Drives: Corsa C
User status: Offline
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Thanks for the replies. Do the 200 cell cats reduce power a lot or would it be minimal? The car is running 290 Bhp at the moment
Corsa C Z20Let
Black Sleeper Turbo Project
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corsadonk
Premium Member
Registered: 4th Jul 09
Location: Marlborough, Wiltshire
User status: Offline
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I've got a 200 cell cat on mine all the time, but it's 2 1/2''.
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Generation
Member
Registered: 7th Jul 09
Location: Essex
User status: Offline
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I think most people with a cars like this get friendly mot's
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Jamie-C
Member
Registered: 3rd Jun 08
Location: Ballycastle
User status: Offline
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my last 3 cars have passed mot without a cat and there was no friendly mot man etc, my last car didnt even have a backbox, just try it and see
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corsadonk
Premium Member
Registered: 4th Jul 09
Location: Marlborough, Wiltshire
User status: Offline
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I am yet to have mine MOT'd with the ZLET in it.
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shaunmods
Premium Member
Registered: 12th Mar 07
Location: Glascote, Staffordshire
User status: Offline
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quote:
Originally posted by Jamie-C
my last 3 cars have passed mot without a cat and there was no friendly mot man etc, my last car didnt even have a backbox, just try it and see
Diesels though weren't they? Bit different because its only a smoke test rather than emissions
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Sly_SRi
Premium Member
Registered: 9th Apr 04
Location: Reading, UK Drives: Corsa C
User status: Offline
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I do have a friendly Mot man but tbh I'd rather have the car completely legal so I don't have to worry about it. Plus if the guy I know stops working there or something then I'm a bit screwed!
I've found one online: http://www.demon-tweeks.co.uk/motorsport/universal-exhaust-parts/redback-fia-approved-motorsport-catalytic-converter
Would this suit my requirements? (mot-worthy whilst retaining power)
Corsa C Z20Let
Black Sleeper Turbo Project
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corsadonk
Premium Member
Registered: 4th Jul 09
Location: Marlborough, Wiltshire
User status: Offline
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Yeah that will do the job.
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mark106mark
Member
Registered: 30th Sep 06
Location: West Midlands
User status: Offline
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My understanding is it goes by what ever oldest. I have a 1998 corsa with a 1990 c20let engine. The engine is pre-cat and therefore not required. Pass all MOT's with no CAT with no issues.
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monkeytwizzel
Member
Registered: 10th Aug 11
Location: Chard, Somerset
User status: Offline
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sly_sri i don`t expect that that cat would get the emissions low enough for mot requirment.
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