Quote:
Originally Posted by Scnell Gelb
aftCG
Thanks for taking the time to add to the discussion - particularly because of your expertise in bearings/loads.
Intuitively many of us liked the roller bearing solution for the IMS but were warned off by the ex-Timken fellow Ed who occasionally contributes.
You mention the DOF oil supply source/pressure loss to camshaft bearings as a problem. If that source was abandoned & the oil supply came from the same source that LN use for their plain bearing Solution, would that help in your view? I ask because that may be an easy mod for those running DOF to make.But did you realise Pedro reduced the diameter of the oil feed in the IMS cover plate? It was a large reduction in flow rate.
I have an LN chromolly driveshaft as an upgrade and share your confusion about why a mild steel shaft is inadequate. Looking at the construction of the oil pump ,you would think that was the weak link ,not the steel drive shaft.
In your study of the oil circulation system, did you ever figure out why/where the Factory diagram is wrong ? Many of us would love to know !
Thanks again for your contribution.
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I'm going to carefully word this, but I don't consider myself an expert in bearings. I
do have a very long background in manufacturing and design including tool design. I replaced bearings in a lot of vehicles. Mostly wheel bearings but also motorcycle transmission and crankshaft bearings (which were rollers - the crank was pressed together). It is enlightening to pull a really loud bearing out of a piece of machinery and spin it. They usually only have the slightest roughness when they start sounding like hell.
I think Jake's design of pulling oil from a full flow filter housing is excellent. Pretty sure it's probably also protected by a patent, so that is out the window for production. I've queried Jake and he has no intention of developing the "Solution" for dual row cars (it's not economically feasible, so I don't blame him at all).
I took a bunch of pictures to follow the path of oil through the engine and at some point I'll sort through them and post them up (somewhere). I have yet to refer back to the published diagram to see where the discrepancy is. I also missed something related to the way the bearing carrier gets oil for the mains, rods and spray nozzles so I need to back track and figure that out.