sxi-kid
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Registered: 2nd Feb 08
Location: Greater Manchester
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is it possible to gain power but keep it sounding standerd as possible,
i didnt think you could do this but i have been told it can be done ?
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alan-g-w
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Registered: 9th Nov 07
Location: Glasgow
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I wouldn't think so. If you want to make any serious power differences (by serious I mean about 5-10bhp, if that) I'd say you'd need to de-cat it at least and that makes it quite loud. I can't think of any other way you would do it without the exhaust getting louder.
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sxi-kid
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Registered: 2nd Feb 08
Location: Greater Manchester
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its not the c20xe its the 20xe the pre cat engine matey
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alan-g-w
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Registered: 9th Nov 07
Location: Glasgow
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I thought they came with cats from the factory and people can just remove them if they want.
In that case, I'd say it'd be a case of a bigger bore than standard and removing middle boxes and the like. Which is going to make it loud.
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sxi-kid
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Registered: 2nd Feb 08
Location: Greater Manchester
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 thought it would end up this way lol might get a custom one made with middle boxes on it to keep it as quiet as poss cheers matey
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alan-g-w
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Registered: 9th Nov 07
Location: Glasgow
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Don't take my word for it, I'm going on educated guesses. As you say, phone up the experts and see what they can do for you
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marklawton
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Registered: 24th Apr 05
Location: Pensby, Wirral Drives:Golf mk4 GTI
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you would want to keep the middle box really, otherwise it will be too loud and you will lose alot of back pressure. u want some back pressure 
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Ste L
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Registered: 3rd Jul 06
Location: Manchester Drives: 106 16v Rallye
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quote:
Originally posted by alan-g-w
I thought they came with cats from the factory and people can just remove them if they want.
In that case, I'd say it'd be a case of a bigger bore than standard and removing middle boxes and the like. Which is going to make it loud.
no 20xe's in astra GTE didn't come with a cat
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sxi-kid
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Registered: 2nd Feb 08
Location: Greater Manchester
User status: Offline
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 thats the one
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chrex
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Registered: 26th Aug 07
Location: Brawdy/Wirral
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thats why its 20XE, the 'C' is the emission regulation. So, all the C20XE's need cats, but the early ones dont. 20XE, 20SEH, 18E...all early engines with no emissions regulation.
And from then, you have 'C', 'Z' and now 'A' for the emissions category.
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alan-g-w
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Registered: 9th Nov 07
Location: Glasgow
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Ah right, didn't know that. Cheers
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sxi-kid
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Registered: 2nd Feb 08
Location: Greater Manchester
User status: Offline
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thats why every time i get out of it i nearly pass out with the smell of fuel haha
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alan-g-w
Member
Registered: 9th Nov 07
Location: Glasgow
User status: Offline
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Yep, I've got a c20xe with a de-cat. Can't beat the smell of V Power from it.
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