macca1
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| posted on 4/2/09 at 08:19 PM |
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Cat position
I'm about to start tackling my exhaust system on my R1 indy and was wondering, are here any noise/emission benefits to be had depending on which
side of the silencer the cat is fitted?
I would rather go for the set up that would assist the sound levels as I'm thinking the emissions can be delt with by playing with the
mapping.
Any views?
Col
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dinosaurjuice
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| posted on 4/2/09 at 08:24 PM |
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i doubt it makes much difference where the cat is for silencing,
BUT, for emissions cat's work best when hot, so before silencer is preferable.
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mark chandler
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| posted on 4/2/09 at 09:39 PM |
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Cats will not work far from the engine so you have no choice, as close to the block as possible, ie straight after the headers.
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tomprescott
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| posted on 4/2/09 at 09:46 PM |
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Ditto, just after headers, although pref hidden as they're pretty ugly and also a potential target for thieves. My sisters was sawn out when she
parked in a supposedly secure all night carpark!
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britishtrident
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| posted on 5/2/09 at 08:50 AM |
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quote:
Originally posted by tomprescott
Ditto, just after headers, although pref hidden as they're pretty ugly and also a potential target for thieves. My sisters was sawn out when she
parked in a supposedly secure all night carpark!
Thats was last year - Cats are only at risk of being stolen when the scrap metal price is high --- right now it through the floor.
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