cpcrampton
Member
Registered: 16th Feb 07
Location: Stirling
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CYLINDER HEAD
Best cylinder head
Price: Haggle
Where: Breaker's yard
Vauxhall has tweaked the cylinder head design several times over the past 13 years. The early C16XE head (casting number: 90472726) is a cracker as it uses much larger ports, whereas the later X14XE and X16XE use smaller and different shaped ports that peg the power back. The very latest head casting (number: 90400187) uses triangular inlet ports, which work a lot better, gaining up to 12bp.
what year car will i find the new head on?
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Dave A
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Registered: 10th Dec 03
Location: County Durham
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any c16xe engine.
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gavin18787
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Registered: 22nd Feb 05
Location: Basildon, Essex
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quote:
Originally posted by Dave A
any c16xe engine.
On that note the ported and polished one i got from you made 120 on the rollers at the weekend with just a back box 
Drives supercharged Tec with torque  
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cpcrampton
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Registered: 16th Feb 07
Location: Stirling
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i have a c16 head and the casting number is not 90400187 maybe im going mad. i dont know. it says the latest heads made aswell c16 is the oldest of the bunch
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Dave A
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Registered: 10th Dec 03
Location: County Durham
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quote:
Originally posted by gavin18787
quote:
Originally posted by Dave A
any c16xe engine.
On that note the ported and polished one i got from you made 120 on the rollers at the weekend with just a back box
that was a very very good head.
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gavin18787
Premium Member
Registered: 22nd Feb 05
Location: Basildon, Essex
User status: Offline
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quote:
Originally posted by Dave A
quote:
Originally posted by gavin18787
quote:
Originally posted by Dave A
any c16xe engine.
On that note the ported and polished one i got from you made 120 on the rollers at the weekend with just a back box
that was a very very good head.
Just need to do a few tests to find out where all my oil is going  then an inlet and a full exhaust should see a good figure and a nicer drive
Drives supercharged Tec with torque
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Warren G
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Registered: 14th May 06
Location: Kent
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quote:
Originally posted by cpcrampton
The very latest head casting (number: 90400187) uses triangular inlet ports, which work a lot better, gaining up to 12bp.
what year car will i find the new head on?
i have one of these in my garage with several bent valves and guides though
are these better than the c16xe heads?
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broster
Premium Member
Registered: 6th Dec 02
Location: Drives: E39
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the c16xe isnt the best head as people believe, i got my one from an x14xe, with the 90400187 part number
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Dave A
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Registered: 10th Dec 03
Location: County Durham
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mines a x16xe with headwork. you could get a ropey old x14 head and end up with the same spec after having work done on it.
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gavin18787
Premium Member
Registered: 22nd Feb 05
Location: Basildon, Essex
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Where is the casting number? is it above the raised dots?
Drives supercharged Tec with torque
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Warren G
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Registered: 14th May 06
Location: Kent
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but standard which is best?
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Dave A
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Registered: 10th Dec 03
Location: County Durham
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c16
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Warren G
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Registered: 14th May 06
Location: Kent
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but they say the later one with triangle ports adds upto 12bhp, so surley thats the best????
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gavin18787
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Registered: 22nd Feb 05
Location: Basildon, Essex
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Although if your doing head work I assume you should just get the newest best condition head you can as it doesnt make a difference which it is
Drives supercharged Tec with torque
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cpcrampton
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Registered: 16th Feb 07
Location: Stirling
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going to source one of these 90400187 heads at the weekend. let you know what happens
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gavin18787
Premium Member
Registered: 22nd Feb 05
Location: Basildon, Essex
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Although surely if this head gains 12bhp the new corsa sports should be putting out more power then the older ones as standard........
Drives supercharged Tec with torque
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Warren G
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Registered: 14th May 06
Location: Kent
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the triangler shaped head was fitted to astra g's x16xel as far as i no
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cpcrampton
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Registered: 16th Feb 07
Location: Stirling
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do you think vaxhaul themselves would answer questions about this head and gains etc?
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Warren G
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Registered: 14th May 06
Location: Kent
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dought it! who you gonna ask though, thats the problem
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broster
Premium Member
Registered: 6th Dec 02
Location: Drives: E39
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dave, the shape of the ports is actually different inside, head work wont change that.....
also its not 12bhp just by bolting it on, if you port the head etc then youll see gains of 12bhp over other heads
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Dave A
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Registered: 10th Dec 03
Location: County Durham
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yes mark, I agree. its one of those things though, if you are spending 5k+ on an engine build then you may get a few extra BHP over a well worked x16 head....
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broster
Premium Member
Registered: 6th Dec 02
Location: Drives: E39
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yeah pretty much. when every little counts its where the extras are.
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RobHayes
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Registered: 6th Sep 03
Location: Lincolnshire
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does that mean the head on my old engine is a special triangular one? from a t reg vectra...newer style rocker cover etc
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broster
Premium Member
Registered: 6th Dec 02
Location: Drives: E39
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not necessarily
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RobHayes
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Registered: 6th Sep 03
Location: Lincolnshire
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quote:
Originally posted by broster
not necessarily
how can i check, without taking it to bits
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