Originally Posted by John_Kunkel
Originally Posted by Hemi_Joel
In theory they keep the slosh from the bottom of the pan off of the crank.


But they also give a surface close to the spinning crank for tossed-off oil to rebound off of and cause windage resistance.


Yes, that is the debate. Which is why a bunch of people switched over to screens or diamond punched trays. I just put a huge box pan on the BBF dyno mule that I'm building. I figure bigger is better when it comes to oil pans.

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