Putting bigger gears in the oil pump and spinning it faster gives more VOLUME, not pressure. ?
My point is "R", is that you are not here to help anyone or contribute useful information to the thread, you are here simply to be the center of attention. Your posts are rife with errors, contradictions and lacking logic and common sense.
For instance you state:
It was the scavenge-fed oil supply to the head that was somewhat lacking, the oiling being somewhat intermittent.
This showed up as sometimes rapid wear of cams and cam followers, due to little oil coming down the pushrod tunnels.
And also of rockers and valve guides. It wasn't until the pressure fed oiling to the head for 1964 (was it ?) that this was corrected.
And the real reason for the bigger oil capacity oil pump, since pressure oiling the head would otherwise have taken pressure/volume away from the big ends...
It was 1966 when Norton switched to plain rocker spindles. They started using the bigger "S" pump in 1961 and did so for five years with the scavenge feed to the head with no problems, so no it was NOT the reason for the bigger capacity oil pump.
Also, since the pressure to the big-ends was not from the scavenge side of the pump how could it take pressure away from them?
If you state that the big problem with early Dominators was lack of oiling to the top, then you contradict yourself by stating that it is silly to worry about putting a cartridge filter in the scavenge return to the oil tank. Since you are such an expert on hydraulics then you know there is a pressure drop across a cartridge style filter, and that would decrease the amount of oil to the top end of the early Dominators, which was always my point. If however as I previously suggested someone makes up for the pressure drop across a cartridge filter by installing some of the same upgrades to the rest of the oiling system that Norton did, then they do not have to worry. They would certainly have to worry if they take your advice to just install parts without thinking though.
Telling people to change their oil more often or that having a washable mesh filter being just as good as a cartridge filter is silly. A cartridge filter will remove much smaller particles than washable/reusable mesh filters. The point of upgrading the earlier oil systems to where they can use a cartridge filter is that it offers much better longevity of the crankshaft journals, and also it has been proven to protect the crankshaft journals in the event of an engine component failure that dumps metal particles into the oiling system.
Having dismantled and looked at the crankshafts of many Norton twins, both early Dominators and late Commandos that had cartridge filters over their service life, I know this first hand.
All this information has previously been put up in this thread, but you either did not read it, or your reading comprehension is very low.
I am in this thread to offer good and helpful information about Norton Dominators, you are here doing the exact opposite just so you can flex your ego.
