Offshoreonly.com - Anyone Tried Extractors?

Quote:

Originally Posted by compedgemarine (Post 3829800)

they work fine on drag engines that only see a few seconds of WOT but when run for extended periods they can pull oil from the wrist pins and cylinder walls. NASCAR engines run pin oil drilled rods and oil squirter for the bottom of the pistons, etc, etc, so they can use them without issue. if the engine is not set up for all the additional oiling then the evacuation can cause more harm than the few HP you would gain. just my .02 cents though.

Not quite sure I get how reducing crankcase pressure would reduce piston pin oiling. I would actually tend to believe the opposite. By reducing crankcase pressure, you are decreasing the air density, thereby allowing oil slung from the crank to travel faster and farther. The picture that comes to mind is putting a feather in a vacuum, it drops like a rock, due to the lack of aerodynamic friction. the reduced pressure would also improve oil quality by lowering the boiling point of water. Interesting enough is that piston ring sealing is shown to be improved with lower crankcase pressures. Looks to me like I may be running an experiment next season.