baz
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I'd be interested in that too
New Rebuild won't start
- Thread starter Woody850
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What sort of oil pressure are you maintaining with this setup?
Hortons Norton
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How is the top end oiled??
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That is what I am thinking of doing. I am going to fit the CBS oil gauge to the top end then I will have the pressure at the top end.
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The standard oil line comes of the same banjo before the cam line.
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How does it lubricate the camshaft as an end feed would seem to do no more than supply oil to the drive-side camshaft/bush unless there's more to it because the original 850 camshaft would not have the breather drilling and the universal 06.1084 camshaft (below) would spray oil out of the breather 'inlet' holes? With no feed restriction then it would be diverting a significant quantity of oil away from the crankshaft as well as the rocker feed.
Motorcycle parts and spares for Norton motorbikes - Genuine Andover Norton Spare Parts - Andover Norton Motorcycles Parts - Original Andover Norton Parts
Motorcycle parts and spares for Andover Norton motorbikes: Andover Norton manufactures and supplies all Genuine Factory Spare Parts for Norton motorcycles built before 2002.
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The feed is through a breather camshaft. This modification was not done as a back room after thought. I will however reduce the diameter of oil line as the oil lines should remain universal in my opinion.How does it lubricate the camshaft as an end feed would seem to do no more than supply oil to the drive-side camshaft/bush unless there's more to it because the original 850 camshaft would not have the breather drilling and the universal 06.1084 camshaft (below) would spray oil out of the breather 'inlet' holes? With no feed restriction then it would be diverting a significant quantity of oil away from the crankshaft as well as the rocker feed.
Motorcycle parts and spares for Norton motorbikes - Genuine Andover Norton Spare Parts - Andover Norton Motorcycles Parts - Original Andover Norton Parts
Motorcycle parts and spares for Andover Norton motorbikes: Andover Norton manufactures and supplies all Genuine Factory Spare Parts for Norton motorcycles built before 2002.andover-norton.co.uk
However I must include this option was offered to me by a very well established Norton race/restorer who has been on the track since 1959. This morning I called him once more simply to put my mind at rest to be assured mine is not the first and will not be the last while those which are on the track and roads have held up and are enduring what they were built for.
I will however monitor the oil feed and may simply blank the connections as soon as I have the pressure gauge fitted but I am still convinced this is a problem which should have been taken care of in the factory.
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If you are using a breather camshaft then unless you have blocked the four approx 3mm breather holes in the centre of the camshaft that take the internal air from inside the crankcase then there will be four open holes feeding the oil direct to the sump. So the camshaft needs modifying to block the air inlet holes off and new smaller hole or holes to direct oil to the lobes. Typical total hole size would be 40 thou diameter or 1mm.
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What is the problem exactly?
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Interesting, took me a minute to locate the additional banjo fitting. Seems to me all that line would do at the breather end of the cam is blow air and oil back and forth from cam to the banjo fitting. However, I've never tried it, so have no clue. Should be simple to tell if the top end is getting lubricated by pulling off a rocker spindle cover. Oil should dribble out with the rocker spindle cover off. If no oil came out you would have some problems, oil pressure gauge installed or not.
Good luck with the pops and spits. I did read the thread but have already forgotten most of it.
Was bad gas mentioned?
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Ok, but, as kommando said if the modification feeds oil to the end of a breather camshaft then not only will it divert oil away from the crankshaft and rocker gear and reduce oil pressure only for it to be blown into the sump.
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Well I am glad to be versed regarding what has been done and I understand fully what is put forward to me by all. For peace of mind I will blank the cam oil inlet and dispose of the line for peace of mind (thankfully all is external) and the engine need not to be pulled down.
Now comes my question, I have an idea but please give me your input how you would blank the now removed oil inlet to the cam other than simply screwing a bolt in with an aluminium washer?
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Bolt with dowty washer would work better.
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Thanks kommando, I should have some lying around spare for petcocks.
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OK I just had a visit from the good man who did this conversion for direct feed to the camshaft. The truth has been aired and I have now replaced it.How does it lubricate the camshaft as an end feed would seem to do no more than supply oil to the drive-side camshaft/bush unless there's more to it because the original 850 camshaft would not have the breather drilling and the universal 06.1084 camshaft (below) would spray oil out of the breather 'inlet' holes? With no feed restriction then it would be diverting a significant quantity of oil away from the crankshaft as well as the rocker feed.
Motorcycle parts and spares for Norton motorbikes - Genuine Andover Norton Spare Parts - Andover Norton Motorcycles Parts - Original Andover Norton Parts
Motorcycle parts and spares for Andover Norton motorbikes: Andover Norton manufactures and supplies all Genuine Factory Spare Parts for Norton motorcycles built before 2002.andover-norton.co.uk
Apparently this conversion has been used on the track for over 30 years and was even mentioned in the Norton Tuning Book written by Paul Dunstall. The cam has been blanked off and the oil feed had a diameter of 21/2 to 3 mm.
No matter somebody will air doubt but if anybody is apprehensive how could it have been founded and used on Dominator and Commando twins.
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The Dunstall Mk4 camshaft end feed conversion apparently used a drilled camshaft that fed oil directly to the cam lobes.
Need info on Dunstall 810? WEC R 540 camshaft
I am looking at a camshaft supposably out of a Dunstall 810 with the number WEC R 540 stamped on it. Does anybody have info on what this might be. It has no oil scrolls and would require the old combat bushing which I already have in place. Seen here...
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