For my clarification, and the ever road to learning more about these engines in depth, something got me thinking. A lot of fast road/race engines have breathers on the rocker cover, however how does the crank case pressure get into the rocker cover? The only place i can think of is via the pushrod holes, but that would involve pressure getting past the followers, surely?
On my engine i have a 1" breather pipe from the rocker cover to a catch can in the N/S wheel arch, the timing cover breather also T's into the pipe through a 1/2" pipe. The transfer case breather is currently open to atmosphere, which inherently has meant that oil has got over my boost pipes. I'm really limited for space for the transfer case breather as i have one of the boost pipes going right over the top. Now, i don't really want to block this up (could I get away with blocking that?), but my concern for excess crank case pressure is there.
Thoughts, comments, queries?