Jed D
Member
Registered: 15th Mar 11
Location: Durham
User status: Offline
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yea yea, but like wouldent that save a little on juice? and what damage would it do to the engine longterm for road use?
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IvIarkgraham
Premium Member
Registered: 27th Mar 04
Location: Ellesmere Port, Cheshire
User status: Offline
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quote:
Originally posted by Eddx14xe
quote:
Originally posted by IvIarkgraham
mines running 125 with an inlet and cat back 
So if you get a exhaust mani, port and polish the head you will gain 52bhp
ther's only 1 way to find out!
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3CorsaMeal
Member
Registered: 11th Apr 02
User status: Offline
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take the windscreen out, also rear screen and headrests, this makes you aerodynamically faster as you don't have to move the air over your car, it just passes through the car
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alan-g-w
Member
Registered: 9th Nov 07
Location: Glasgow
User status: Offline
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quote:
Originally posted by JedDy
yea yea, but like wouldent that save a little on juice? and what damage would it do to the engine longterm for road use?
It would use more fuel, a warmer engine is a more efficient engine
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Sport_1
Member
Registered: 2nd Feb 10
Location: Ellesmere port cheshire
User status: Offline
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quote:
Originally posted by JedDy
quote:
Originally posted by Sport_1
4.2.1
will that hang lower or is that 4.1?
the 4.1 hangs low mate 4.2.1 fit up tight like the standard
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danbo
Member
Registered: 1st Jul 08
User status: Offline
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4-2-1 are better for mid range and 4-1 high revs or the other way around? someone will know lol
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Dave
Member
Registered: 26th Feb 01
Location: Lancs
User status: Offline
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quote:
Originally posted by naz-gsi
not imo
Altho inlet manifold, exh manifold, performance cat back, port+polished head blank egr. All done on my mates gsi kicking out 177bhp
I can smell something, and it's not what The Rock is cooking.
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KyleCorsa
Member
Registered: 6th Jan 09
Location: Wrexham (North Wales)
User status: Offline
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IMO 421 manifold's are better. Main reason for me is that the 4 into 1 are stupidly low to the floor and just scrapes everywhere lol. But they both do give different gains. I think a 421 is better for mid range power and a 4 into 1 for top end power. Something like that anyway but i may be wrong though.
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Jed D
Member
Registered: 15th Mar 11
Location: Durham
User status: Offline
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cheers fellas 
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philip2
Member
Registered: 1st Oct 06
Location: n.wales/chester
User status: Offline
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as said...inlet, stock airbox and a panel filter is best imo, decent 4-2-1 ex manifold...making sure the lambda boss is at the bottom of the manifo0ld and not in number 3 primary.
as for 177bhp...ive got carbs, high comp pistons, headwork, pretty big cams, sbd ex manifold, 2.25 system...proper competition one, double springs, etc etc, if i make 190-200bhp ill be on the ball.
177bhp is tbs and cams minimum tbh matey. its nearly as good as a lad on turbosport claiming 217bhp@wheels with his 20xe on some mild ast1612 cams....nice to believe but not a hope in hell.
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KyleCorsa
Member
Registered: 6th Jan 09
Location: Wrexham (North Wales)
User status: Offline
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I think around the 140 - 150 BHP mark is more realistic if you have the powerbox type inlet with all the cams, headwork, 421 etc etc.
To reach 170 BHP you would be needing throttle bodies imo
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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 KyleCorsa
4 into 1 are stupidly low to the floor and just scrapes everywhere lol.
I never caught my old 4-1 on the floor atall - and I live down a badly potholed, rutted gravel track and lane...
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