Better Oil Flow to the Sump

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Gardner
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Location: Davenport, Ia

Better Oil Flow to the Sump

Post by Gardner » Fri Mar 08, 2019 11:15 am

While rebuilding crash Darmah's engine I decided to use a variation of Kevin Brackens oil flow solution found in his excellent article - https://www.ducatimeccanica.com/kevin_race_engine.html and another oil flow idea from an unknown author found here - http://www.webgrafex.com/roundcase/duca ... tions.html After drilling the hole to drain the rear head onto the transmission I noticed the original drain slot that drained on top of the right side of the crankshaft. Kevin found that oil falling on the crankshaft creates unwanted drag.
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I welded up the stock drain and machined smooth and enlarged the drain hole a bit to accomodate both rear head drains.
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Also added drain holes under the transmission and crankshaft. There is a few thousandths clearance between the cylinder and crankcase bore so
some will still drain down on the crankshaft.
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The drain for the front head was smoothed and radiused. I probably won't notice any difference, but it didn't take much time and kept me out of the tavern! Hopefully enough oil will be flying around for the main bearings.
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1978 SD Darmah
1979 SSD Darmah
1981 900SS
2017 Desert Sled
1982 Bimota HB2

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BevHevSteve
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Re: Better Oil Flow to the Sump

Post by BevHevSteve » Tue Mar 12, 2019 9:59 pm

Let us know if you find this to be a good thing you did or a not so good thing.................
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