Crunchies on the drainplug %^^&*&(

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Hi Jim, whats the reason for the front hole outside the sealing area a la Ludwig?
Regards Mike
 
Ludwig found that by drilling through the three fins at the front allowed the air to flow, therefore cooling this critical area of the head. Without the holes the air just dams up while riding.
That how he explained it a while back.
Cheers,
Thomas
CNN
 
comnoz said:
For several years I have had one thermocouple in a hole drilled into the head from the rear to a point between the bores about 1/4 inch above the gasket surface and a second thermocouple in between the bores in the barrel two fins down. They tend to run about the same temperature. The head temp just changes a little faster when you crank the throttle and the barrel temp catches up shortly.

I have not seen a change in that behavior since I eliminated the head gasket.

I have never run the engine with a composite gasket, so I can't say much for sure -but I suspect the top of the barrel would still run close to the head temp. The lower part of the barrel is always much cooler.

Bore distortion has not been a problem with the iron barrels.

I have seen less warping of the head gasket surface since I went to waisted headbolts however. Jim
Click to expand...


Sorry for being that rude, but like you are the right person at the right place at the right moment with the right bike with the right thermocouples at the right place, why not try to put a composite gasket and check the heat transfer between head and barrels.

If no distortion, there might be perhaps less expansion of the barrels with the composite one, no?
 
NKN said:
Sorry for being that rude, but like you are the right person at the right place at the right moment with the right bike with the right thermocouples at the right place, why not try to put a composite gasket and check the heat transfer between head and barrels.

If no distortion, there might be perhaps less expansion of the barrels with the composite one, no?
Click to expand...

I probably would have tried it at some point but the bike has always been a big bore. 920, then 880, now 924 and the composite gaskets are only available for standard bore.
 
CanukNortonNut said:
Ludwig found that by drilling through the three fins at the front allowed the air to flow, therefore cooling this critical area of the head. Without the holes the air just dams up while riding.
That how he explained it a while back...Cheers,Thomas...CNN
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I was trying to remember about this (although I must admit I was lazy and didn't try to search for the answer) thanks for posting it, it's a sound idea and I will be incorporating it. Ya gotta love this forum right :)
 
Day one is down. 560 miles in today. 75 to 90mph.
No leaks, no seizures, no funny noises and no oil consumption. So far -so good. Jim
 
MS850 said:
Hows the weather Jim
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Well today was hot but dry. Just under 500 miles today. The oil is still full and clear.

My only complaint is now with the lighter pistons I have some vibration that I never had before. Before the next trip I will need to re-balance the crank and get the balance factor back down where it belongs. Jim
 
Brooking 850 said:
Thanks CNN, does size matter in this instance?
Hole size I mean
Regards Mike
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Hi Mike,
I think Ludwig's choice was around 5/16" or a close metric equivalent.
That's what I did to mine. :wink:
Cheers,
Thomas
CNN
 
comnoz said:
MS850 said:
Hows the weather Jim
Click to expand...

Well today was hot but dry. Just under 500 miles today. The oil is still full and clear.

My only complaint is now with the lighter pistons I have some vibration that I never had before. Before the next trip I will need to re-balance the crank and get the balance factor back down where it belongs. Jim
Click to expand...

How does the vibration compare with a stock engine MK3?
 
MS850 said:
comnoz said:
MS850 said:
Hows the weather Jim
Click to expand...

Well today was hot but dry. Just under 500 miles today. The oil is still full and clear.

My only complaint is now with the lighter pistons I have some vibration that I never had before. Before the next trip I will need to re-balance the crank and get the balance factor back down where it belongs. Jim
Click to expand...

How does the vibration compare with a stock engine MK3?
Click to expand...

A perfectly setup Mk3 has no vibration at road speed.

My bike now has a slight vibe.
 
Steve,
Are You checking out all of comnoz secret squirrel stuff. :mrgreen: I hope you guys are having fun at the LOP. I have got to do that one year.
Cheers
T
CNN
 
LOP was a good time.

Had a bit of trouble on the last day when my speedo stopped working. A little looking reviled that the rear wheel had shifted to the right far enough to damage the speed sensor. When I tried to remove the axle to see why, I found it would not budge, even with a hammer and drift.
A friend came to the rescue and hauled the bike and I to his shop in Dallas where we ended up using a hacksaw to cut the axle on both sides of the hub to remove the rear wheel so we could remove the damaged wheel bearing that was solidly welded to the axle.
Another Norton savior gave me the use of his machine tools today to make a new rear axle and spacers. I found the bearings I needed at Napa.
The bike is now packed and ready to head for Barbers in the morning.
A big thank you to John E., Bob C. and Steve L. for the help. I would have been up the shit creek without you guys. Jim
 
comnoz said:
LOP was a good time.

Had a bit of trouble on the last day when my speedo stopped working. A little looking reviled that the rear wheel had shifted to the right far enough to damage the speed sensor. When I tried to remove the axle to see why, I found it would not budge, even with a hammer and drift.
A friend came to the rescue and hauled the bike and I to his shop in Dallas where we ended up using a hacksaw to cut the axle on both sides of the hub to remove the rear wheel so we could remove the damaged wheel bearing that was solidly welded to the axle.
Another Norton savior gave me the use of his machine tools today to make a new rear axle and spacers. I found the bearings I needed at Napa.
The bike is now packed and ready to head for Barbers in the morning.
A big thank you to John E., Bob C. and Steve L. for the help. I would have been up the shit creek without you guys. Jim
Click to expand...

Happy Trails Jim.
Cheers,
Thomas
CNN
 
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