Originally Posted by Neil S

Cheers
My vent pipe is 'large', so I guess it's all good
Good mini-essay
Neil.
Good, seems you understand
basically, we could have, for example..
2x 15mm from cam cover.
&
2x 15mm from crankcase.
If we only have 15mm to vent all this out of, we are still no better than it was as standard IMO. Other than teh fact that you may have 15mm from both sides which solves the crankcase oil surge issue somewhat.