Eck
Premium Member
Registered: 17th Apr 06
Location: Lundin Links, Fife
User status: Offline
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quote:
Originally posted by corsadonk
I've got a spare CAT in the shed, and was gonna make a de-CAT with it. Is it worth the hassel then?
That will be worse than a normal cat, sports cat and decat.
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DannyB
Premium Member
Registered: 6th Feb 08
User status: Offline
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quote:
Originally posted by corsadonk
I've got a spare CAT in the shed, and was gonna make a de-CAT with it. Is it worth the hassel then?
Why are you going to butcher a cat to make a de-cat? just buy a bit of pipe and cut it to length and clamp it in place of the cat.
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djgritt
Premium Member
Registered: 1st Nov 07
Location: Dorset Drives: Focus ST / Hyundai i20N
User status: Offline
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quote:
Originally posted by DannyB
quote:
Originally posted by corsadonk
I've got a spare CAT in the shed, and was gonna make a de-CAT with it. Is it worth the hassel then?
Why are you going to butcher a cat to make a de-cat? just buy a bit of pipe and cut it to length and clamp it in place of the cat.
Might be intending to do what I did with mine and cut the Old cat out and weld pipe in its place - that way you keep the flange and correct alignment and don't have yet another couple of stupid clamped joints to try to seal.
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DannyB
Premium Member
Registered: 6th Feb 08
User status: Offline
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This is how mine is, 5 minute job to change, sealed with exhaust paste just to be sure. Doesn't blow at all. Loosen them 2 bolts and loosen the bolts at the manifold, take the exhaust off 1 of the hangers and it pushes out.
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djgritt
Premium Member
Registered: 1st Nov 07
Location: Dorset Drives: Focus ST / Hyundai i20N
User status: Offline
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It's a 5 min job to swap the whole cat pipe on the Corsa - 2 bolts at the dowpipe termination, and 1 clamp at the centre section termination
I personally wouldn't want to increase the amount of joints/flanges to faff with on mine over what I have to do already 
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corsadonk
Premium Member
Registered: 4th Jul 09
Location: Marlborough, Wiltshire
User status: Offline
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My plan was cut the cat off, get some money for it off the scrap man. Then swage in a section of straight pipe
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chrisritch
Member
Registered: 2nd Sep 08
Location: Northants Drives: V40
User status: Offline
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then when the mot comes around you need to buy a cat
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harrisp
Member
Registered: 15th Dec 07
Location: Derbyshire
User status: Offline
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quote:
Originally posted by chrisritch
then when the mot comes around you need to buy a cat
Didnt read the thread then?
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corsadonk
Premium Member
Registered: 4th Jul 09
Location: Marlborough, Wiltshire
User status: Offline
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quote:
Originally posted by chrisritch
then when the mot comes around you need to buy a cat
I've got two dude
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chrisritch
Member
Registered: 2nd Sep 08
Location: Northants Drives: V40
User status: Offline
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quote:
Originally posted by harrisp
quote:
Originally posted by chrisritch
then when the mot comes around you need to buy a cat
Didnt read the thread then?
no
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Pete_vxl
Member
Registered: 24th Nov 06
Location: Lochgelly, Fife
User status: Offline
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I had a sports cat on the astra and a pre cat decat and passed mot fine. Performance wise it was very minimal but never brought on any lights however with the peddle test it logged a fault but it wiped it when i mapped my car.
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scottyp1989
Member
Registered: 29th Jul 07
Location: Warley, West Midlands
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probly wouldnt make enough off weighing in a corsa cat to buy a piece of pipe TBH
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corsadonk
Premium Member
Registered: 4th Jul 09
Location: Marlborough, Wiltshire
User status: Offline
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It's got to be worth over a fiver, and with the batteries it's shouldn't be too bad
[Edited on 28-10-2010 by corsadonk]
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Jambo
Member
Registered: 8th Sep 01
Location: Maidenhead, Drives: VXR Arctic
User status: Offline
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Pete my GSI didn't suffer from the codes on the sports cat but I'm guessing the ecu reads wildly differently being forced induction
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Pete_vxl
Member
Registered: 24th Nov 06
Location: Lochgelly, Fife
User status: Offline
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It might have been the pre cat that caused the codes. Either way it didnt make a difference to performance and didnt bring on a dash light. I had a decat in my corsa sport and it made it a lot more free flowing in the higher gears at low speed. Cost £20 from a garage that made it for me, i sold the car before its next mot but i imagine it would have failed as you got high off the fumes after driving for a bit.
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