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XU10J4R(S) Project ! - Printable Version

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+--- Thread: XU10J4R(S) Project ! (/showthread.php?tid=32070)

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XU10J4R(S) Project ! - Yohann77 - 30-09-2015

Hello everyone !

Here is my project, I recovered a XU10J4R and I 'm currently the completely reassembled with RS parts for my 306 1.8 16v

I buy that



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I completely dismantled





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Engine components were in good condition in general



Rs pistons are placed on rods XU10J4R



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The cylinder head is planed and ducts are enlarged and polished

She is assembled with RS camshafts



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New pads



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Engine parts assembled and paint 



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Rs manifold on the engine head and paint 




assembled



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RS exhaust manifold



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Following soon !


RE: XU10J4R(S) Project ! - Andre3000 - 30-09-2015

Nice!!!! Good job
Please keep this thread up2date.

RE: XU10J4R(S) Project ! - MY95 - 30-09-2015

Brilliant mate!

RE: XU10J4R(S) Project ! - Yohann77 - 30-09-2015

Thank you ! I start to hear a hurry

Sorry for the thread :/

RE: XU10J4R(S) Project ! - Toms306 - 30-09-2015

Bonjour, tes voiture est tres jolie!

Bon choix de moteur remplacement aussi. Wink

RE: XU10J4R(S) Project ! - MY95 - 30-09-2015

Never knew you spoke French Tom.... or was that Google Translate lol Tongue

RE: XU10J4R(S) Project ! - Toms306 - 30-09-2015

Ha, GCSE French from 2008... Wink It might be all wrong though, his English is most likely better than my French. lol

RE: XU10J4R(S) Project ! - MY95 - 30-09-2015

I checked it Tom, not bad Tongue Not fully correct though lol

RE: XU10J4R(S) Project ! - puggered - 30-09-2015

Welcome

A word of caution, If you're using RS cams with R valves and springs, be careful of valve spring bind.
They are right on the limit for handling the extra lift, the RS uses dual springs.

RE: XU10J4R(S) Project ! - Yohann77 - 30-09-2015

thank you tom, you reassure my English is worse than your french , you doing you good!

Thank you to google translator  ThumbsUp

Puggered : I kept my single spring XU10J4R you think there is a risk ?

RE: XU10J4R(S) Project ! - Eeyore - 30-09-2015

So its a gti6 head on a 1.8? Sounds interesting. Good to see someone finally do it.

RE: XU10J4R(S) Project ! - puggered - 30-09-2015

(30-09-2015, 11:40 AM)Yohann77 Wrote: thank you tom, you reassure my English is worse than your french , you doing you good!

Thank you to google translator ThumbsUp

Puggered : I kept my single spring XU10J4R you think there is a risk ?

Measure your full lift, if it's over 9.65mm then there is a very good chance of bind.
I've done the same as what you have but I had to use different springs.

(30-09-2015, 11:46 AM)Eeyore Wrote: So its a gti6 head on a 1.8? Sounds interesting. Good to see someone finally do it.

It's an XU10J4R head with RS cams not an RS head.

RE: XU10J4R(S) Project ! - Yohann77 - 30-09-2015

The difference between R and R

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Left is RS

RE: XU10J4R(S) Project ! - puggered - 30-09-2015

The cams are not the only difference.
R uses larger inlet valves with smaller exhaust valves.
RS uses thinner valve stems for better high RPM valve speed with double springs.
Better porting in the RS head.
RS uses sequential injection and ignition where the R doesn't.

Unless you plan on using a different ECU then the benefit is virtually 0 btw.

RE: XU10J4R(S) Project ! - Yohann77 - 30-09-2015

Your comment is interesting.

If I find RS springs it will already better right?

My ecu is the factory but there will be reprogramming ..

I changed the R injectors by RS

RE: XU10J4R(S) Project ! - Poodle - 30-09-2015

Interesting project, there was a lot of discussion on this a few months ago, might be of use to you. I *think* the thread was originally posted by eeyore in the xu section, hopefully that should help you find it.

RE: XU10J4R(S) Project ! - welshpug - 30-09-2015

RS stems are not smaller than R, they are smaller than the old J4, Mi16.

RE: XU10J4R(S) Project ! - puggered - 30-09-2015

you can't put RS springs into a R head without machining. The spring seats and caps are different. 7mm vs 6mm. I'm not sure on the valve stem length.

The sagem ECU (if that's what you have) can't handle the cams from the RS properly and although I've never tried, I don't believe you can remap them.
To take full advantage you need to use either the complete RS head, Loom and ECU or the R head with RS cams and stronger valve springs (catcams do some I think) with the RS ECU and loom.
You also need to bore the R head behind the inlet cam pulley so you can fit the cam position sensor. (there is a blank there)

confused yet? Smile
(30-09-2015, 01:23 PM)welshpug Wrote: RS stems are not smaller than R, they are smaller than the old J4, Mi16.

I stand corrected, Welshpug is right. was getting my J4 and J4R's mixed up

RE: XU10J4R(S) Project ! - Yohann77 - 30-09-2015

For the XU10J4RS:

diameter exhaust stems : 30.8
diameter admission stems : 34.2

For the XU10J4R

diameter exhaust stems : 34.7
diameter admission stems : 29.7

And there as 1mm différence between diameter steems enter R and RS

RE: XU10J4R(S) Project ! - puggered - 30-09-2015

no, the stems are the same as Welshpug pointed out.

RE: XU10J4R(S) Project ! - Yohann77 - 30-09-2015

Yes it is very clear, thank you  ThumbsUp

So if i put the RS ECU (magneti marelli) is better than R ECU (yes it is sagem, mp5.2) ?

RE: XU10J4R(S) Project ! - puggered - 30-09-2015

better but will still need mapping.
the R uses Bosch mp 5.2 and is not friendly to map.
The 1.8 uses Sagem.
best option would be to use a standalone ECU and run non-sequential injection and ignition.

RE: XU10J4R(S) Project ! - Yohann77 - 30-09-2015

Yes it would be best to put a sybele but $$$  Phew

RE: XU10J4R(S) Project ! - Yohann77 - 01-10-2015

Hi ! 

I got a be3 / 5 with a differencial in 19x75 .

That is my lab  Rofl

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I have a new clutch 

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A new paint and seals and it is mounted


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RE: XU10J4R(S) Project ! - Eeyore - 01-10-2015

that looks amazing! come and do mine! D:

RE: XU10J4R(S) Project ! - lolsteve - 01-10-2015

If nothing else that's a very fresh looking engine

RE: XU10J4R(S) Project ! - Yohann77 - 02-10-2015

Eeyore :  Big Grin  If one day I just take a trip to pugfest why not !!


Thanks for your comments !

RE: XU10J4R(S) Project ! - Yohann77 - 02-10-2015

Hi 

Today i paint my logo 

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RE: XU10J4R(S) Project ! - highwayman306 - 02-10-2015

Yohann, your car is absolument génial Wink

Pur et parfait ThumbsUp

I can't wait to see more on this, i don't think I've seen a cleaner engine Big Grin....i do own diesel though lol

RE: XU10J4R(S) Project ! - Yohann77 - 03-10-2015

Thank you very much, it is painting that does it all ! I hope he will run as well as it is beautiful Rofl