Quote:
Originally Posted by sperry
IMO, on a street car, I'd run a pair of closed-loop catch cans; on a race car, I'd run an open vented air/oil separator that drains back to the crank.
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OK, that is what I was thinking, but did not see that as the conclusion on IWSTI and such.
Another question I have is why is there a perceived pressure differential between crankcase and heads that has to be dealt with? They are definitely connected by large enough oil drain passages to allow any instantaneous surge to quickly equalize. Is there something I am missing?