Steve X16XE
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Registered: 31st Dec 06
Location: Barnsley, South Yorkshire
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My mate is sticking a 20XE engine into his MK2 Astra.
He's after 230bhp but he's not fitting TB's. He said that it'll hit 230bhp without TB's, i'm not so sure.
What sort of spec will be needed to see that sort of figure?
He's fully stripped the engine down, rebuilt everything with new bits. Done a lot of work to the Coscast head, 265 cams, larger single TB. Don't have an exhaust sorted yet.
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Ste L
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Registered: 3rd Jul 06
Location: Manchester Drives: 106 16v Rallye
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would defo need standalone management to get anywhere near them figure's, with really lairy cam's too
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Daimo B
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Registered: 20th Mar 00
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Wont hit 230 on those cams.
ONLY way he's gonna make that power without TB is on nitrous.
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Corsa_Sport21
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Registered: 13th Apr 08
Location: Leven, Fife. Drives : 205 GTi
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Only way it will hit that kind of power is with a shit load of gas.
Oops,took ma time to reply 
[Edited on 28-08-2008 by Corsa_Sport21]
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Adam_B
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Registered: 13th Dec 00
Location: Lancashire
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doubt it would even get over 200bhp on the standard inlet.
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DaveB
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Registered: 29th Dec 00
Location: Huddersfield
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..as has already been said. iirc there is a chap on MIG that is making over 210bhp, STILL with the AFM etc in place on motronic but it's got a totally custom inlet and has had a shit load of money spent on it too.
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Robin
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Registered: 7th Jan 04
Location: Northants Drives: Clio 182 Cup
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Agreed, no chance on those cams without nitrous.
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Corsa_Sport21
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Registered: 13th Apr 08
Location: Leven, Fife. Drives : 205 GTi
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Yeah and those cams arent really that high a lift.
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Steve X16XE
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Registered: 31st Dec 06
Location: Barnsley, South Yorkshire
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He's going to get the standard management remapped. Plus he's thinking about 285 cams.
N2O is going to be added when the engine is run in.
I was doing the maths with him last night, i got to 190 TOPS.
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Corsa_Sport21
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Registered: 13th Apr 08
Location: Leven, Fife. Drives : 205 GTi
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Is it possible to get the standard management mapped to that level??
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Steve X16XE
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Registered: 31st Dec 06
Location: Barnsley, South Yorkshire
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I would never say never, however, unlikely with this spec.
So "if" he hits 200bhp, he's going very well???
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DaveB
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Registered: 29th Dec 00
Location: Huddersfield
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Won't happen
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Steve X16XE
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Registered: 31st Dec 06
Location: Barnsley, South Yorkshire
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What do you thinkthe MAX he'll get with standard management and inlet?
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Corsa_Sport21
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Registered: 13th Apr 08
Location: Leven, Fife. Drives : 205 GTi
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At a guess id say a realistic 170.
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DaveB
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Registered: 29th Dec 00
Location: Huddersfield
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On my old astra XE (before TBs) I got 187, 180, 183, 179 on 4 different rolling roads.. so high figures are possible to get - but for all the effort he'd be best just going aftermarket to start with.
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Steve X16XE
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Registered: 31st Dec 06
Location: Barnsley, South Yorkshire
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What had you done to the engine to get that amount of power?
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av it
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Registered: 4th Mar 08
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max 180bhp to 190bhp on standard inlet imo as we all know thats the main restriction that needs to be replaced or modified to unleash the power but keep us updated as it will be interesting to see how he goes on
[Edited on 28-08-2008 by av it]
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Daimo B
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Registered: 20th Mar 00
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The issue isn't the inlet. LET's have proved you can flow nearly 400bhp from them, in fact, i hear its even higher....
BUT
Its getting the air/fuel into an NA engine, so he's going to need some major headwork, some major high lift cams, and everything running perfectly to hit 200bhp.
I did know Swindon ran up to 190bhp using the standard inlet. No info how though at all.
No reason why this isn't an un-realistic figure to go for, but still gonna need some MAJOR work to get there.
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Steve X16XE
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Registered: 31st Dec 06
Location: Barnsley, South Yorkshire
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This is a few pics to what he's done. I've not updated the pics for a few months. It's moved on a bit since the last pic.
http://www.corsasport.co.uk/board/garage.php?action=usergarage&owner=Steve%20X16XE&carid=5846&page=all
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Steve X16XE
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Registered: 31st Dec 06
Location: Barnsley, South Yorkshire
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quote:
Originally posted by VXR
Its getting the air/fuel into an NA engine, so he's going to need some major headwork, some major high lift cams, and everything running perfectly to hit 200bhp.
He said the the head has a stage 3 done to it  Does that mean anything to you?
The cams are piper 285 (if he does go for them ones).
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av it
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Registered: 4th Mar 08
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quote:
Originally posted by VXR
The issue isn't the inlet. LET's have proved you can flow nearly 400bhp from them, in fact, i hear its even higher....
BUT
Its getting the air/fuel into an NA engine, so he's going to need some major headwork, some major high lift cams, and everything running perfectly to hit 200bhp.
I did know Swindon ran up to 190bhp using the standard inlet. No info how though at all.
No reason why this isn't an un-realistic figure to go for, but still gonna need some MAJOR work to get there.
yes but were talking NA not a let so i stick by the 190bhp max unless silly squirt is added 
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Steve X16XE
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Registered: 31st Dec 06
Location: Barnsley, South Yorkshire
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He was using an example to show me that the standard inlet on the 20XE isn't all that bad. I undersood.
Oh and N2O will be added at a later date.... when he gets fed up of me still beating him
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DaveB
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Registered: 29th Dec 00
Location: Huddersfield
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quote:
Originally posted by VXR
The issue isn't the inlet
Infact it is; you can't get enough air into an N/A engine through the normal inlet/TB/AFM - it's too small - that's why people fit carbs and throttle bodies - bigger holes - more air - more fuel - MORE POWER!
[Edited on 28-08-2008 by DaveB]
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Daimo B
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Registered: 20th Mar 00
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quote:
Originally posted by Steve X16XE
quote:
Originally posted by VXR
Its getting the air/fuel into an NA engine, so he's going to need some major headwork, some major high lift cams, and everything running perfectly to hit 200bhp.
He said the the head has a stage 3 done to it Does that mean anything to you?
The cams are piper 285 (if he does go for them ones).
TBH, the fact they are mass produced cams and not custom jobbies deffo says to me that it won't make anything like the power he's expecting. They are high lift, but I thought XE's run sometimes 300 degree cams to get in the big power range?
Stage 3, pfff means nowt really fella, kinda like saying "yeah man, i've got a regal stage 3 tune" = I've had my ass raped.....
I am interested though to see the final power outcome, but realistically, he's looking at 180's tops I think.
Av It, indeed, but people saying the inlets the restriction when its not, its the same inlet as a LET, so can flow massive amounts of air. But its the simple fact an NA sucks air in, and isn't forced in, so will never get the airflow that a LET does, but the manifold can flow the overall air rate.
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Daimo B
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Registered: 20th Mar 00
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quote:
Originally posted by DaveB
quote:
Originally posted by VXR
The issue isn't the inlet
Infact it is; you can't get enough air into an N/A engine through the normal inlet/TB/AFM - it's too small - that's why people fit carbs and throttle bodies - bigger holes - more air - more fuel - MORE POWER!
Doh, replied after.
Thats not the inlet, thats just the simple restriction of an NA engine. Not the inlet itself.
Daves rule is correct though. More air, more fuel, more POWWWWWEEEEEEEEERRRRRRR 
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