CharlieWaffles
Well Known Member
I recently came across a air/oil separator for io-540s but it has a 3/4" input and output. The breather tube connection in my yio-540 stock from vans is 1". Seems to my limited engine knowledge that reducing the breathing tube to a smaller size could create higher pressure to the crank case. But perhaps the air/oil separators are all this size and the reduction is no issue. Can anyone shed light on this to me?