broster
Premium Member
Registered: 6th Dec 02
Location: Drives: E39
User status: Offline
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did a bit of work on the clio last night, people have always been saying the standard inlets are rubbish, very poor matching etc. so i took the liberty of finding a spare inlet and matching it, open it up to match the head etc...
to be honest i was impressed with the gain, but it matches what everyone else says.
i also added a new exhaust at the same time so i dont expect the gain to all be from the inlet!
as standard the car was:
166bhp 141lb ft
with matched inlet and cat back yozza sport system:
185bhp 156lb ft
***awaits rollers are out comments***
[Edited on 18-11-2008 by broster]
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DAZ1985
Member
Registered: 3rd Sep 06
Location: Scholar Green, Cheshire
User status: Offline
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Cant argue with that. Was thier a big difference in the inlet size?
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broster
Premium Member
Registered: 6th Dec 02
Location: Drives: E39
User status: Offline
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yeah, each runner was 46mm on mine (had an elusive RS inlet) now they are 50mm, but its the step that there was on it to the head that caused the main problems
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Fad
Member
Registered: 1st Feb 01
Location: Dartford Kent Drives: 330cd
User status: Offline
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Nice gain in torque.
There is a lot of scepticism towards this mod but this silences the critics 
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broster
Premium Member
Registered: 6th Dec 02
Location: Drives: E39
User status: Offline
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there's alot of rubbish about it so i decided to give it ago myself, it feels alot better on the road. this proves it works. want yours doing??
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Fad
Member
Registered: 1st Feb 01
Location: Dartford Kent Drives: 330cd
User status: Offline
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Tempted but I am going to be selling it...bad time of year to do it too 
Did you have any interest in yours?
Part of me just wants to do it 
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broster
Premium Member
Registered: 6th Dec 02
Location: Drives: E39
User status: Offline
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no interest at all, decided to keep it instead.
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Fad
Member
Registered: 1st Feb 01
Location: Dartford Kent Drives: 330cd
User status: Offline
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How long till you TB it? 
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broster
Premium Member
Registered: 6th Dec 02
Location: Drives: E39
User status: Offline
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haha, dunno...... after xmas
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RCS
Member
Registered: 26th Jan 05
Location: Lichfield/Dundee
User status: Offline
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Most of that gain will have come from matching the inlet, you can tell by the shape of the graphs. Good result!
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broster
Premium Member
Registered: 6th Dec 02
Location: Drives: E39
User status: Offline
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yeah, the exhaust is a 2.5" bore on it now but still have the standard cat in there
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Fad
Member
Registered: 1st Feb 01
Location: Dartford Kent Drives: 330cd
User status: Offline
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I was tempted by the renault tuning maps
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broster
Premium Member
Registered: 6th Dec 02
Location: Drives: E39
User status: Offline
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im interested in these aswell especially as they are so cheap.
would go for cams then a map.
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Fad
Member
Registered: 1st Feb 01
Location: Dartford Kent Drives: 330cd
User status: Offline
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Them Billet cams are somewhat a bit of an ass raping tbh
That Henk guy seems to be spot on, went out in a cup with this map and H&R's and it just blew me away how quick it was down the lanes near Mark Fish
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broster
Premium Member
Registered: 6th Dec 02
Location: Drives: E39
User status: Offline
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id go for some newman cams if i went for cams, best people for cams IMO!
Henk has been very helpful, had a few questions abotu some maps, deffo worth getting the maps from.
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Ojc
Member
Registered: 14th Nov 00
Location: Reading: Drives : Clio 197
User status: Offline
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Moving away from Clios and back to small block XE's, do you think there is much gain to be had from doing the same thing to the inlet on the Corsa? I remember Lee Manning had his done and that car was fast as XE's with an inlet, set of cams and some headwork.
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broster
Premium Member
Registered: 6th Dec 02
Location: Drives: E39
User status: Offline
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when we do ported heads on the small block xe we match the inlets, they arn't that far out to be honest, id be suprised if the gain was as significant. will to do before and after runs on one if someone supplied a car and spare inlet
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Ojc
Member
Registered: 14th Nov 00
Location: Reading: Drives : Clio 197
User status: Offline
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Talk me through ported heads and the gains to be had from this.
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JM_16v
Member
Registered: 17th Oct 05
Location: Essex Drives: GLC63S
User status: Offline
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i have a friend in the market for a 182 fad cs
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Nick-S
Member
Registered: 3rd Mar 04
Location: Leigh. Drives: RS Megane 230 F1 Team R26
User status: Offline
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Nice results
I am a bit confused though. You fitted an exhaust system as well and said some of the extra power will have come from that....
But when you fitted a new exhaust system to your car a few months ago, i asked how much extra power would it have gained from it, your reply was, none it an exhaust system. 
[Edited on 18-11-2008 by GSi_16v]
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mk4_astra
Member
Registered: 15th Oct 03
Location: aylesbury,bucks
User status: Offline
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nice power gains
correct me if im wrong but wasnt it a modified inlet that was fitted to the 182's to bring them up to 182bhp from the claimed 172bhp the 172s make?
cams and map sounds good aswell, go for that next 
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broster
Premium Member
Registered: 6th Dec 02
Location: Drives: E39
User status: Offline
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mk4 astra, it was the exhaust manifold and system that made the main difference between the 172 and the 182.
GSI 16v, i dont normally expect gains from an exhaust on its own, especially if there is a standard cat still in place
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Nick-S
Member
Registered: 3rd Mar 04
Location: Leigh. Drives: RS Megane 230 F1 Team R26
User status: Offline
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arrr right i see. 
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Daimo B
Member
Registered: 20th Mar 00
User status: Offline
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quote:
Originally posted by Ojc
Talk me through ported heads and the gains to be had from this.
Smooth out any edges on the inlet ports of the head, enlarge the ports slightly, match the lip of the inlet manifold to the head.
Basically, its about getting a smooth un-interupted flow of air into the engine, and out again. Smoother the airflow, more air travels in faster and with less disturbence. More air + more fuel = more power.
Imagine an F1 car in a wind tunnel. Air flows over it very smoothly. Now stick a small windowscreen on the front, the airflow is interupted and doesn't flow as well.
Your removing the screen. Aiding the flow in.
Usually you would try to match the exhaust manifold as well to maintain as smooth an airflow in, and out the engine as possible.
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Rob B
Member
Registered: 8th Jan 04
Location: Area Motorsport Drives: Race EP3
User status: Offline
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How much Mark, i want mine doing
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