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Old 08-07-2011, 07:42 PM   #9
new//M3fan
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Join Date: Aug 2010
Location: Reston, VA
Posts: 2,652
My Ride: 78' 924 87' E30
Very well done!

However, A vacuum in the crankcase is beneficial in our case since our engines employ the use of low-tension piston rings.

That small amount of vacuum helps the piston rings seal better. among other things.

A catch can setup that creates vacuum in the crankcase would be the ideal setup.

The vacuum inside the crankcase is only about .5 inHg. I have a reason to believe that increasing the vacuum between 6-8 inHg will net some HP gains.
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Last edited by new//M3fan; 08-07-2011 at 07:57 PM.
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