I've been wondering about this and have heard several different opinions on the subject. How important is it to have some sort of vacuum device on the crankcase? Whether it be the PCV system or an electric/mechanical vacuum pump? I know quite a few people that run breathers but there's even more that still have the PCV system in place. I've read that evacuating the crankcase helps with sealing the piston rings which produces more power. Supposedly it also prevents blow-by and oil consumption. If this is so, what would be a draw-back in running breathers? Other than smelling oil periodically? Any long term issues with running breathers that you know of?
BTW, I'm currently running a breather filter on each cam cover and have completely deleted the PCV system.
Discuss...
