Opinions on windage screen

gregcon said

I generally don't agree that the screen is there to keep the crank from pulling oil up out of the sump. I think it's there - as a uni-directional device - to help 'strip' oil away from the crank as it spins, and to direct is down towards the sump. I can envision some secondary benefit as an anti-pull-from-sump device, but not much. It has way too many holes for that.

Those trays that Matt show look nice, BTW.

I plan to use a screen and a scraper and no tray though nothing is final yet.

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I don’t think there is anything wrong with that. I do know when I last talked with Kevin, the discussion of pan depth came up. In fact, he asked what pan I had.

Since I’m running a Milodon Super Stock pan, my mind figured he say skip the tray. But he didn’t. He told me to either add some screens like Matt did, or to open it up in a couple of places.

The idea that a deep can can run without a tray (or screen) comes from the deep pan on a dyno making more power without a tray.

The problem is, people don’t understand the tool. A static test platform can’t account for oil movement in the pan. The tray (or screen) helps keep the oil off the crank as it moves around in the pan.

I just remembered one other thing Kevin said. Even with a deep pan, not running a tray will allow oil to come off the crank, hit the oil in the sump and it then splashes back up into the spinning crank and it does this until the crank is wrapped in oil.

The guy is very sharp, works at OE level developing oil control solutions and, he’s a very nice guy.