displaying posts 26 to 48 of 48

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Author Subject: xu7jp4 rebuild
asim_pug306

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Location: Bradford

Registered: 26 Aug 2009

Posts: 933

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Post #26
Porting the standard head is a more expensive route from what I understand

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Posted 7th Mar 2010 at 00:31
dragoon

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Location: Ghent - Belgium

Registered: 30 Dec 2008

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Post #27
but the best option apparently..

xsi head would be the cheapest option I guess
(or keep the standard 1.8 head with 6-bits and a remap... also lowest gain probably..)

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Posted 7th Mar 2010 at 00:46
joevts

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Location: barnsley

Registered: 21 May 2008

Posts: 608

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Post #28
anybody want a 1.8 head to mess about with? i've got one going spare. make me an offer.
Posted 7th Mar 2010 at 01:37
karazu

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Location: Londrina Parana Brasil

Registered: 21 Feb 2008

Posts: 59

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Post #29
anyone have a good ideia how to remap 1.8 ecu?

mine is sagem? I know... trow it away... but what other ecu I will put there? gti6 unlocked?

anyone? thanksss
Posted 8th Sep 2010 at 09:31
asim_pug306

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Registered: 26 Aug 2009

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Post #30
Thread revival. Any update on your progress dragoon

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Posted 8th Sep 2010 at 16:10
dragoon

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Location: Ghent - Belgium

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Post #31
@ karazu, the sagem is indeed worthless, i've got a bosch which should be remap-able according to local chiptuners

@asim: can't be arsed to do the rebuild, none local that are willing to do/help with the rebuild and I'm far from skilled enough myself.
Already spent too much on the car, not willing to do so anymore. And I need my car daily! (may reconsider when I can afford a second car again)
Currently has 6 manifold/exhaustsystem and it's going to stay with that, sold all my other parts already Smile
Only remaining plans are the bmc cda, an alloy crank pulley and a remap.

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quote:
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Posted 8th Sep 2010 at 20:56
karazu

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Location: Londrina Parana Brasil

Registered: 21 Feb 2008

Posts: 59

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Post #32
What bosch ecu are we talking abouth?

I was wondering if just trading the minfolds and remap would give me at last 20hp more... (that would be fine for me...)

I will have to find that ECU and buy from UK, in Brazil thats going to make me mad, and crazy and I will never find it.

So.. if anyone can help me!=D
Posted 8th Sep 2010 at 21:30
dragoon

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Location: Ghent - Belgium

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Post #33
normal 1.8 16v ecu... the one that came with my car lol

(but my spare lump has a sagem ecu sadly)

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Astor 306 Francorchamps RIP
Virtual Blue 208 GTi

quote:
I Love this place. So many illiterate deluded fool's acting 'ard . . . and so many literate intelligent people to rip them apart and knock them back down again . . . ahh Cool
Posted 8th Sep 2010 at 23:50
welshpug!

Capt Pedantic

Location: Bigend, Wales.

Registered: 27 Mar 2007

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Post #34
doesnt mtter wht the spre lump hs, its the one in the cr tht mtters.

Doh keydord fil!!

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Posted 9th Sep 2010 at 00:02
dragoon

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Location: Ghent - Belgium

Registered: 30 Dec 2008

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Post #35
lol I know, but if it was a bosch he could buy one of me Razz

and get a new keyboard LOL

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quote:
I Love this place. So many illiterate deluded fool's acting 'ard . . . and so many literate intelligent people to rip them apart and knock them back down again . . . ahh Cool
Posted 9th Sep 2010 at 00:46
dragoon

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Post #36
- thread revival -

not really planning this anymore, but I was pondering about this today and I'm sure some of you can enlighten me

the xu10j4rs head should be plug and play on the xu7jp4, but the one has a 86mm bore while the latter has a 83mm bore, wouldn't this provide, erm, 'incompatibilities'?


(thinking of this because I came up with the idea of replacing a mates broken xu10j4rs header with a ported xu7jp4 one, since we're having a hard time finding a gti6 engine)

sorry for the noob-question, but I'm sure this is the only place I'll get an acceptable/usable reply

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Posted 4th Feb 2012 at 21:21
dragoon

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Post #37
mei? phillip? anyone? :p

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Posted 6th Feb 2012 at 22:11
welshpug!

Capt Pedantic

Location: Bigend, Wales.

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Post #38
its fiiine Smile

not measured the combustion chambers, but they seal fine.

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Posted 6th Feb 2012 at 22:44
dragoon

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Post #39
so it's possible to use a xu7jp4 head on a xu10j4rs?

cool, thanks once again

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Astor 306 Francorchamps RIP
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quote:
I Love this place. So many illiterate deluded fool's acting 'ard . . . and so many literate intelligent people to rip them apart and knock them back down again . . . ahh Cool
Posted 7th Feb 2012 at 18:35
mrdeey

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Post #40
Just a thought ,if the 1.8 is a strong and reliable lightweight lump , how would it cope with a low boost s/c setup and what sort of power gains ? They are 112bhp as standard I think ?

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Posted 11th Feb 2012 at 11:37
welshpug!

Capt Pedantic

Location: Bigend, Wales.

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Post #41
dragoon wrote:
so it's possible to use a xu7jp4 head on a xu10j4rs?

cool, thanks once again


yup, would need extensive port work but valve sizes are fine of course.

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Posted 11th Feb 2012 at 13:23
welshpug!

Capt Pedantic

Location: Bigend, Wales.

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Post #42
mrdeey wrote:
Just a thought ,if the 1.8 is a strong and reliable lightweight lump , how would it cope with a low boost s/c setup and what sort of power gains ? They are 112bhp as standard I think ?


should work well, would benefit from different cams and port work, Ash ran a 1600 crank in an mi16 block using a later xu head and a supercharger.

though likely to be a long way removed component wise, the WRC engines in the Xsara and 206 were based on the XU7 with special 85mm liners and an 88mm crank.

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Posted 11th Feb 2012 at 13:25
mrdeey

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Post #43
does that mean the engine mountings etc were the same then (wrc engines), and would fit straight in ? on the port work , the guru rich-w , does not recomend any on low or high boost on the xu10 lumps , so is the head that poor on the xu7and would still need work for charging ?
what sort of power did ash achieve?

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Posted 11th Feb 2012 at 13:50
welshpug!

Capt Pedantic

Location: Bigend, Wales.

Registered: 27 Mar 2007

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Post #44
standard xu7 uses same engine mounts yes, WRC variants are likely to be quite different, good luck finding one of those LOL

XU7 inlet ports are quite a lot smaller than the XU10, not sure what power ash achieved as a 1600, but there's a few n-a rally builds in the high 100's quite easily.

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Posted 11th Feb 2012 at 14:07
mrdeey

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Post #45
interesting so , am i right in thinking xu10 head on xu7 block and boost it ? with a map ,on low boost 220 - 235 bhp ? and all from a much lighter block , any idea what the weight difference is ?

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Posted 11th Feb 2012 at 17:42
welshpug!

Capt Pedantic

Location: Bigend, Wales.

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Post #46
roughly 17 kilos, what sandy posted about them is quite interesting, due to the piston+rod+stroke geometry the piston speeds at a given RPM are quite a bit lower than the 1.9 and 2.0 engines, iirc this engine would see the same piston speed at 8k that the others see at 7.2k.

http://forum.205gtidrivers.com/index.php?showtopic=74214&st=0

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Posted 11th Feb 2012 at 18:12
phillipm

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Location: Rotherham

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Post #47
The head of the XU7 is good, but has very small ports - that makes it great for careful head re-working as it gives you more room to alter the shape and transition of the ports.

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Posted 11th Feb 2012 at 18:25
welshpug!

Capt Pedantic

Location: Bigend, Wales.

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Post #48
specifically the inlet ports, exhausts are fine apparently Smile

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Posted 12th Feb 2012 at 09:58

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