Ash_EP3
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Registered: 15th May 07
Location: Melksham, Wiltshire
User status: Offline
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http://cgi.ebay.co.uk/Vauxhall-Corsa-B-Tigra-1-4-1-6-16v-Exhaust-Manifold_W0QQitemZ190132353599QQihZ009QQcategoryZ38786QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
Just having a browse on ebay... it says that you can gain at least "10bhp"
is this true? 
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Vaux Lad
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Registered: 15th Dec 04
Location: Stoke-on-Trent
User status: Offline
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They look quite a good 4-1 design, apart from the stupid lambda location.
Id doubt youd see 10hp on a standard engine. Maybe with cams etc yeah.
[Edited on 18-07-2007 by Vaux Lad]
[Edited on 18-07-2007 by Vaux Lad]
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Ash_EP3
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Registered: 15th May 07
Location: Melksham, Wiltshire
User status: Offline
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lol they say anything to get the boyracers out there to buy them... my engine is standard apart from piperX... if I wanted to mod my car I'd want to do it properly (eg the whole thing interior, exterior engine etc) but I just dont have that sort of money....!
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Sunz
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Registered: 12th Jan 07
Location: SE England
User status: Offline
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Thats a 4-1 manifold it works in high rpm
4-2-1 i think is better for a road car as its better in the mid range.
At least is a little optermistic
If you did fit it and had the rest a normal corsa exhaust i cant see the 10bhp happening i really think places like this should have dyno graphs to back up claims.
I optted for a chepo manifold and full system from sportex might loose at least 10bhp
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Vaux Lad
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Registered: 15th Dec 04
Location: Stoke-on-Trent
User status: Offline
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Even a dyno graph wouldn't prove much, as you can make them read whatever you want, depending on what temperature compensation values etc you input.
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bubble
Member
Registered: 24th Jan 04
Location: Darwin, NT Australia.
User status: Offline
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i wouldnt buy from someone who says the egr system will not work with this manifold!!!
what a joker!!
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Vaux Lad
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Registered: 15th Dec 04
Location: Stoke-on-Trent
User status: Offline
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lol
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Dave A
USER UNDER INVESTIGATION - DO NOT TRADE
Registered: 10th Dec 03
Location: County Durham
User status: Offline
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they are rubbish manifolds. bad design, collector flange is shockingly bad as it steps from 2.25" to 1.75" and they scrape on speedbumps.
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Vaux Lad
Member
Registered: 15th Dec 04
Location: Stoke-on-Trent
User status: Offline
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Id much prefer a janspeed type 4-2-1
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Sunz
Member
Registered: 12th Jan 07
Location: SE England
User status: Offline
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quote:
Originally posted by Vaux Lad
Id much prefer a janspeed type 4-2-1
They say the 4-1 works in a higher rpm what are they talking
3500 rpm just wondering.
and the 4-2-1 from 1500rpm ?
And must be always best to get the complete system?
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