[Fot] Crank Scrapers and Cam Lubrication

[Bill Babcock]

I've seen a video of the inside of a crankcase in a running 4 cylinder motor.
Oil splash to the cylinder walls is not an issue. Remember that the full
volume of air is changing under the pistons at 100 times per second at 6K RPM.
Two liters of air swapping all over the place at 100 times per second. The
crankshaft is dragging a cyclone of oil and air around behind it. We visualize
it as something running at 60 RPM, oil spinning lightly off the crankshaft as
it slowly turns. It doesn't look anything like that.  It's not a gentle gust,
it's a vicious tornado. Crank scrapers are diverting the tornado from the
crankshaft. Windage trays are keeping it from jumping back out of the sump.
Much more dynamic than one would naturally visualize.


-----Original Message-----
From: fot-bounces+billb=bnj.com at autox.team.net on behalf of rikrock at aol.com
Sent: Fri 11/16/2007 12:56 PM
To: John.Reed at wilson.com; fot at autox.team.net
Subject: Re: [Fot] Crank Scrapers and Cam Lubrication

So, you guys are saying that there is no downside to using a crank scraper in
a wet-liner motor? That even with connecting rods that don't have the little
oil hole like the stock rods do, enough oil gets?to the cylinder walls?? And
that enough oil gets everywhere it needs to get, all the time?

Rich Rock

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