Tiger_kpt
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Registered: 2nd Apr 05
Location: Retford, Nottinghamshire
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As above guys. Just bought a Stage 3 X16XE head for my Corsa Sport. Gas-flowed, ported, polished, blanked EGR, multi-angle valves and guides, knife-edged, etc.
One problem..... Upon closer inspection of it today the head number upon it refers to it as being an X14XE/X16XEL cylinder head.
What I know is that the X16XEL is exactly the same block as the X16XE but is the "L"ower Power Band engine found in the Astra. The lower power is due to a difference between heads. From what I can find the differnce in head and so power output (100BHP instead of 108BHP) is down to the X14XE head having smaller inlet and exhaust ports as well as the exhaust cam having a lower duration and valve lift. The cam isn't an issue for me as i'll be using my X16XE Piper Fast Road cams.
But the port size may be. That's what I need advising on guys.....
Simply put, if an X14XE head was ported to a Stage 3 level. Would/could the port sizes be the same as an X16XE Stage 3 head? Or is there less material to work with on the X14XE head and so the ports couldn't be bored out to a size as well as an X16XE head.
Also, what are your opinions on multi-angled valves? How are they actually better? And how can you tell them apart form the standard valve? Cheers guys 
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5chaap2k
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Registered: 20th Apr 05
Location: Schiedam, Netherlands
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quote:
Originally posted by 5chaap2k
X14XE (+/- 48mm)
X16XE (55mm)
inlet
x14xe:
x16xe:
[Edited on 12-01-2006 by 5chaap2k]
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ed
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Registered: 10th Sep 03
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The thing that makes the XEL's have less power is the inlet manifold IIRC.
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Tiger_kpt
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Registered: 2nd Apr 05
Location: Retford, Nottinghamshire
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Hmmm. Thanks for those pics and measurements mate. I've just measured the inlet ports that have been ported and polished to a Stage 3 level and they come in at 52mm, 52mm 53mm and 54mm. So this ain't looking good. Basically I have a Stage 3 X14XE head which port sizes are actually smaller than a standard X16XE head. What about the exhaust ports? What are they standard on each of these heads? Or are they the same in size?
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Tiger_kpt
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Registered: 2nd Apr 05
Location: Retford, Nottinghamshire
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All sorted. His error, picking up another one on Wednesday. Woo hoo!
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5chaap2k
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Registered: 20th Apr 05
Location: Schiedam, Netherlands
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nice!!
post pics of it!!
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Tiger_kpt
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Registered: 2nd Apr 05
Location: Retford, Nottinghamshire
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Will do mate. Watch this space...
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Dave A
USER UNDER INVESTIGATION - DO NOT TRADE
Registered: 10th Dec 03
Location: County Durham
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what do you mean by stage 3? i havnt heared that mentioned since i used to tune xr2's
how many heads has this guy got?
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Tiger_kpt
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Registered: 2nd Apr 05
Location: Retford, Nottinghamshire
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The guy does them to order. He works for a performance head and head refurbishment company down in Telford. But he also does them for a great price by doing them and selling them in his own time. You order one and within a week he'll have one ready for you. He does Stage 2 for £325 plus VAT plus £75 deposit until you can exchange your head. And Stage 3 for £425 plus VAT plus the deposit.
I managed to do a deal with him for cash in hand for £425 for a Stage 3 head with no exchange and no VAT. So quite chuffed.
The head is glass beaded, acid bathed, resurfaced (not just painted silver), gas flowed, ported, polished, skimmed, knife-edged, fitted with new valve stem seals, new springs, multi-angle valves, multi-angle valve guides and EGR blanked off (if you require it) to name a bit of the spec. Really nice guy, sound and friendly as. And even through a set of hydraulic lifters in for me.
Only thing the head doesn't come with is the rocker cover, manifolds, cams and pulleys. But if you really required any of these i'm sure that he'd do his best to fulfil your requirments.
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Tiger_kpt
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Registered: 2nd Apr 05
Location: Retford, Nottinghamshire
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P.S: - I'll post pics of it on here when i pick it up tonight Dave mate.
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Dave A
USER UNDER INVESTIGATION - DO NOT TRADE
Registered: 10th Dec 03
Location: County Durham
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Basscrazy
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Registered: 16th Sep 05
Location: If im on here then clearly in front of the pc
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its going to sound stupid but what they do? increase performance etc ive never seen one before
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Dave A
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Registered: 10th Dec 03
Location: County Durham
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remove un-neccesary metal from the ports of the head (the bits the air flows through before it gets to the valve opening.) then make the passage as easy as possible for air to flow through.
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Basscrazy
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Registered: 16th Sep 05
Location: If im on here then clearly in front of the pc
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cool now i know cheers!!!
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Dave A
USER UNDER INVESTIGATION - DO NOT TRADE
Registered: 10th Dec 03
Location: County Durham
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and of course, more air + more fuel= more power
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Tiger_kpt
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Registered: 2nd Apr 05
Location: Retford, Nottinghamshire
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Right Guys.....
Here's the pics as promised of my new head....
Bottom View
Top View
Inlet Side View
Exhaust Side View
Inlet Port
Exhaust Port
Let me know what you guys think to it. Let me know your views on whether it was worth the cash and whether the craftsmanship is good enough/enough has been done to it for a "Stage 3" head. Cheers all.
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Dave A
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Registered: 10th Dec 03
Location: County Durham
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difficult to tell from the pics really
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Tiger_kpt
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Registered: 2nd Apr 05
Location: Retford, Nottinghamshire
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Oh... and this is the FULL spec of the head in terms of work carried out...
*VAUXHALL CORSA GSi 16v CYLINDER HEAD.
FULLY PORTED AND GASFLOWED. SPEC. Inc:
* MULTI ANGLE VALVES
*MULTI ANGLE VALVE SEATS
*PORTS 'KNIFE' EDGED FOR MAXIMUM FLOW
*ENLARGED PORTS AND VALVE THROATS FULLY GASFLOWED, POLISHED and PORTED
*Then FULLY RECONDITIONED Inc:
*FULL ACID DIP AND DECOKE.
*HEAD SHOT (BEAD) BLASTED TO RENEW ALLOY SURFACE. (NOT PAINTED SILVER!)
*FULL SET OF BRAND NEW VALVES FITTED
*VALVE GUIDES RENEWED.
*VALVES RESEATED.
*CYLINDER HEAD RESURFACED.
*REBUILT USING NEW MODIFIED SEALS.
[Edited on 19-01-2006 by Tiger_kpt]
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Dave A
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Registered: 10th Dec 03
Location: County Durham
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but i would have expected the exhaust ports to be made oval:
get some better pics up
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Dave A
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Registered: 10th Dec 03
Location: County Durham
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from the pics, the ports do look very smooth...
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Tiger_kpt
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Registered: 2nd Apr 05
Location: Retford, Nottinghamshire
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More pics here. Excuse the lightness. But a good way to show the details: -
Inlet
Exhaust
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Tiger_kpt
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Registered: 2nd Apr 05
Location: Retford, Nottinghamshire
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In all... what do you guys think to it? Good work? Bad work? Any improvements? Etc. Any feedback would be welcomed.
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Dave A
USER UNDER INVESTIGATION - DO NOT TRADE
Registered: 10th Dec 03
Location: County Durham
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Tiger_kpt
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Registered: 2nd Apr 05
Location: Retford, Nottinghamshire
User status: Offline
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Anymore feedback?
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Corsa E-Tec
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Registered: 4th Feb 04
Location: Stevenage Drives: Leon Cupra
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looks good, what improvement does this do to the engine?
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