[pippintook]

When I had blowby , I think I took an old pcv valve and just cut out the middle (so valve was mostly open), this did not make much of a difference in the high rpm blowby. So, I generally just ran a stock type PCV valve. I could drive the car normal - like just cruising around and the odd moderate acceleration and afterwards oil dipstick would not move and very little dripping oil from the engine. But, as soon as I beat on the engine and drove it pretty hard I almost always had oil dipstick pop a bit and afterwards I would usually see some pretty moderate to severe oil drips on the floor. I found that not much , if any oil, actually seemed to come out the dipstick. I think I just eventually put a bolt in there. There are lots of styles of valve cover grommets. Some are open, some have a one slit or a cross slit. I had a bunch of grommets and I tried different things, like half open or drilling different holes in the bottom - nothing really seemed to have an impact on my engine's high rpm blowby. One thing I also did was stick some velcro on back of oil pan (cleaned first) and then I would stick/jam some small sponges in there - that would help with the dripping oil from back of pan / rear main seal. Periodically, I would change the sponges.