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Ghibli de Hongrie [ENG]

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Re: Ghibli de Hongrie [ENG]

Messagede alpa » Lun 28 Mai 2018 12:06

spacecadet a écrit:So I can either adjust the difference between the exhaust and intake cams by changing the pin in the sprocket in the back, or just change the chain since I already have it. By the way found the manufacturer mark on the chain: https://www.reginachain.net/ They mainly do chains for motorcycles, another Ducati connection like Nigusil?


Interesting ! Have you tried to contact them ?

I can not help about the shaft you tried to dismount. Honestly speaking I did not understand what you were trying to do.
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Re: Ghibli de Hongrie [ENG]

Messagede spacecadet » Lun 28 Mai 2018 18:37

alpa a écrit:Yea this does not look right.
I'm sorry I did not read the entire thread. I guess you've checked first that there is a lash between cams and buckets ?
Your valves may have been burned if timing/richness was wrong and combustion was continuing with open valves.


Yes, double checked to be at TDC at the end of compression, and that there is a lash between the cams and buckets. First I though I'm at the wrong TDC, but unfortunately not.

I've measured AFR earlier with a wideband lambda, and that seemed to be ok (I don't remember the exact numbers) but that was after I've replaced the out of spec sensors. There was definitely a rich situation I think earlier.

alpa a écrit:Interesting ! Have you tried to contact them ?


Not yet, but I just wrote them an email. Will see.

alpa a écrit:I can not help about the shaft you tried to dismount. Honestly speaking I did not understand what you were trying to do.


Thanks, It's already done, it was just very tight. I had to remove the bearings first.

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Re: Ghibli de Hongrie [ENG]

Messagede alpa » Lun 28 Mai 2018 19:07

spacecadet a écrit:
alpa a écrit:Interesting ! Have you tried to contact them ?


Not yet, but I just wrote them an email. Will see.


Oops, me too !

spacecadet a écrit:
alpa a écrit:I can not help about the shaft you tried to dismount. Honestly speaking I did not understand what you were trying to do.


Thanks, It's already done, it was just very tight. I had to remove the bearings first.

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Ok I see.
For your information you can mount old (before ABS) axles with their wheel hubs on these hub carriers. Perfectly compatible. This allows mounting old rims with the 96mm instead of 98mm (or the opposite, don't remember) center distance.
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Re: Ghibli de Hongrie [ENG]

Messagede spacecadet » Lun 28 Mai 2018 20:03

Forgot to show these pictures. One exhaust valve is leaking. Is this white color normal? Could it be because of the additives in the modern fuels or it's burned?

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Re: Ghibli de Hongrie [ENG]

Messagede alpa » Lun 28 Mai 2018 23:31

Modern fuel is not unlike 30 years before and modern valves are similar to what we had on biturbo engines.
This white color is not unusual on exhaust valves. It forms a kind of very hard ceramic, not necessarily lean combution. You'll find the same on the piston crown. For sure it was not running rich. May be a bit too much white especially on valves themself.
I can show you beatifull pinkysh valves from 3200gt.
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Re: Ghibli de Hongrie [ENG]

Messagede spacecadet » Mar 29 Mai 2018 22:56

That's good news. The results are still hard to believe for me, so I'll triple check everything once again.
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