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Old 02-22-2012, 01:21 PM
fabby318is fabby318is is offline
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Location: Chicago, Il
Join Date: Apr 2005
Posts: 28
Mein Auto: 97' 528i & 91'318is
Originally Posted by bimmerteck View Post

Crankcase vacuum increases ring piston seal, reduces oil leaks, and improves oil flow within the block.

I personally believe the BMW I6s need a little MORE vacuum in the crankcase than stock rather than less. I say this b/c when I've installed dry sump systems with multistage scavenge pumps the I6 motors tend to see around a 15% increase in power on the dyno. Oil pressure drops slightly and generally lower oil temps follow as well.

As to those wanting to eliminate the mayonnaise, run ethanol free fuel if you can find it and the volume will be reduced dramatically as it is often caused by water in your fuel being deposited in the crankcase due to blow by.
Sorry to thread jack somewhat, but Bimmerteck can you please supply me with more info on your dry sump system...any pics installed? Thanks.
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