DragBikeMike
Serious Thumper
   
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SuzukiSavage.com Rocks!
Posts: 4471
Honolulu
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Armen, I can understand why you wouldn't want to use low pressure, unfiltered oil from the sump to lube the top end (cam, rockers, valves, etc.), but a typical manual transmission lives in a slurry of ground up shift dogs, syncro trash, and gear tooth debris. The dip lube units seem to hold up OK and that oil is straight out of the slop bin. I've never seen a manual trans with a filter. Granted, the oil our transmission currently receives has been through a filter, but it still contains wear products off the rod bearing, and I suspect it's also mixed in with sump oil that's splashing all around. I don't get your aversion to using drain oil off the top end. I'm sure it will contain wear products, but I doubt they will be much worse than what's already goin through the mesh.
I was planning to run the drain oil through a simple cooler device and locate neodymium magnets in the cooler to trap ferrous wear products.
After thinkin a bit about stacking pumps and running the discharge through the stock circuit, it dawned on me that the filter probably won't be able to handle all the flow. At best, the bypass relief will lift, at worst the filter will collapse. That would be a very complicated modification. I wonder if the drive gear could handle twice the load.
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