It's a long way to 920 type(rary)

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If they machined the gasket then there might have been a thin spot and that is where the gasket blew. There could have been a mistake fastening down such a thin piece of metal and trying to mill it to a perfect thickness.
 
Hi there,
A long day, travelling to Solingen in Germany, 500 kms on the road, to meet Steven, the owner from Elmeso Reban, Elmeso is a small workshop with a hudge of knowledge about HG, Steven is a very fine man and he take all the time needed to explain me the secrets of the HG.
I take a original 850 composite gasket with me, and he says it is good made, His opinion is to make a composite HG, but different problems appear: 1.00mm is the minimum tickness and I wish 0.6mm...
The 1mm HG will crush 10%, what will says that when set the HG will be 0.9mm, to ritch the 1.1mm piston to head clerance I should need to mill 0.3mm from the head, not a big deal I think...
Like the original HG, is proposal is nearly the same, a steel plate with composite on both faces, the difference with the original is the composite: His composite is made of glass fiber with graphyte and this is more neutral as the original and will beter wirstand the heat and pressure.
Like on the original he will put a sreel ring around the bores the inside diameter will be 81.6 or 81.7mm to fit the 81.4mm from the squish band from my cylinder head, Steven says that the inside diameter will flat out to 81.4 once the head is on place and torque. To him there will not be any problem as long you keep 6mm gasket between the bore and bolt holes or pushrod tunnels, this will be ok but not for the oil return hole... the hole is 6mm, so he wish to reduce the hole to 4mm, the question is: will 4mm enough to drain the oil away??
The second solution for the drain hole is to offset 2mm to the outside of the gasket and file the holes in the direction of the offset on the head and cylinder to ritch the gasket oil drain hole.
The third solution is to make a outside drain tube, like Maney do on his stage 3 heads, but I never see one, so if someone as a pic from this, I will be very gratefull.
The gaskets will be ready in 4 weeks from now. feel free tyo give me your valuable opinions about the HG story
Thanks
Yves
 
https://www.accessnorton.com/NortonCommando/modifying-oil-return-holes-in-head.13324/

Apparently Kenny Dreer did the external oil drain too.

It's a long way to 920 type(rary)


It's a long way to 920 type(rary)
 
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yves norton seeley said:
this will be ok but not for the oil return hole... the hole is 6mm, so he wish to reduce the hole to 4mm, the question is: will 4mm enough to drain the oil away??
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BTW I just measured a Steve Maney copper head gasket and the oil drain hole is not 6mm, it is 5.1m (0.2"). And by recollection the drain hole in cast barrels is 4mm, I could check that but better to look at your own Maney barrels.
 
SteveA said:
BTW I just measured a Steve Maney copper head gasket and the oil drain hole is not 6mm, it is 5.1m (0.2"). And by recollection the drain hole in cast barrels is 4mm, I could check that but better to look at your own Maney barrels.
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Hi Steve,
I think I will go for the external oil drain, but where should I conect the tube on the cases?
Thanks
Yves
 
Hi Yves,
I have just been and took this pic, the pipe to the right of the breather block is the pipe from the head, hope this helps. The hole was already in my cases, i just screwed a airline connector into it and attached the pipe.

Will you be at Chimay?, I have seen your bike there before and would like to see it again this year.

It's a long way to 920 type(rary)
 
storm42 said:
Hi Yves,
I have just been and took this pic, the pipe to the right of the breather block is the pipe from the head, hope this helps. The hole was already in my cases, i just screwed a airline connector into it and attached the pipe.

Will you be at Chimay?, I have seen your bike there before and would like to see it again this year.

It's a long way to 920 type(rary)
Click to expand...
Yes I will be there, I will be also at Spa and Gedine
See you there
Yves
 
The picture SteveA posted above is a Ron Wood/Axtell short stroke 750 head. Steve Maney did his pretty much the same way. These are pictures of a Maney Stage 3 head with the external oil return.

It's a long way to 920 type(rary)


It's a long way to 920 type(rary)


Ken
 
storm42 said:
Nice one, I have booked for Spa and have a garage this year, see you there.

Found this picture i took in 2015, i believe it is your bike.

It's a long way to 920 type(rary)
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Yes, it's my bike before I change the fuel tank, the discs for Fontana drums and the Norton forks for a Ceriani
 
yves norton seeley said:
Hi Steve,
I think I will go for the external oil drain, but where should I conect the tube on the cases?
Thanks
Yves
Click to expand...
Where Storm42 shows it is good and can be easy on any Maney cases. But I wonder if some effort might not make it possible to have it flow some oil onto the intermediate gear/cam chain?
 
storm42 said:
Nice one, I have booked for Spa and have a garage this year, see you there.

Found this picture i took in 2015, i believe it is your bike.

It's a long way to 920 type(rary)
Click to expand...
Ah, I will be at Spa too, hopefully with my rather tatty 850. I'll keep an eye out for both Storm42 & Yves :-)
 
SteveA said:
Where Storm42 shows it is good and can be easy on any Maney cases. But I wonder if some effort might not make it possible to have it flow some oil onto the intermediate gear/cam chain?
Click to expand...
That's how I have seen it done,the oil drain goes to the top of the timing side crankcase
 
SteveBorland said:
Ah, I will be at Spa too, hopefully with my rather tatty 850. I'll keep an eye out for both Storm42 & Yves :)
Click to expand...

Nice one, I will be in one of the F1 pit boxes ( don't know which one yet) so should be easy to find, Be good to meet up.
 
Ken’s is a 1007 though, which has to have the external oil pipe, so although I’m not 100% sure, I imagine the 1007 cases come with that extra hole (check out the cases shown on Steve’s site, they have the hole).
Perhaps Ken, or another 1007er can confirm?
 
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