going for some oil separation and drainage like in my previous VC

 

Update - I've moved the block breather line from the catch can do the oil filler port on the Hypertune rocker cover.
The reason for the change is I was still getting a tiny bit of oil in the catch can, and over the day I should start to get very small blips of oil surge. The car is running more power now, and i've changed to Yokohama 260/640R17 slicks which has dropped my lap times by 2 more seconds (1:10 to 1:08 at Hampton Downs).
The oil surge is because the oil level drops over the day as the catch can slowly fills up. It was typically settling at around the "Low" mark on the dipstick before it stopped coming out.

With the breather line location change, I can now run on the "Full" notch on the dipstick with no oil being spat out, and the oil pressure is great.
These lap times at my local circuit are similar to factory-built GT4 race cars.

 

Mike,

So you had "Block Breather" line originally going to Oil Catch Can, in addition to the 2- Rocker Cover Breather lines going to the Oil Catch Can?

And then you removed the Block Breather , plugged it off, and instead routed that line to the top of the valve cover- plumbing it to the Fill Port of the Hypertune rocker cover.
So now you are only breathing through 3-ports all out of the Rocker Cover. And now you no longer get oil spilling/spitting out, and oil pressure is great.

Also, the baffling in the rocker cover you show above, seems to have been in Red OEM rocker cover. Or is that Hypertune Rocker Cover?
Does Hypertune Rocker Cover feature your baffles, or does Hypertune use own baffles, if any?


Thank you ckafurtubg the oil breathing route/setup, and baffles too. Thanks for engineering awesome solution.

 

Pretty ballsy, I'd be afraid of insufficient oiling around the valvetrain. Perhaps keep up on your oil samples, i'm not sure what material is in the bearings, rockers & wear items on the valvetrain, but i guess see if there's any deviation from your baseline in your oil samples?

I have an X so IDK now the 4g's behave on this. the 4b's are rather fantastic all around

 

Those holes don't lubricate the valvetrain, they shoot oil up into the valve cover and that's it.
The cam journals are lubricated through the head with a galley going to each journal. The lifter/rocker/lobe is lubed by oil coming out of the lifter tip, and then the rocker has a small hole that makes an oil jet that shoots oil directly at the the lobe/roller interface. There is no need for splash oiling in the head.

 

^ This

 

Makes me wonder why they bothered to add it in the first place? Maybe as a source of heat shedding since the block is iron?

 

my guess is bleeding air bubbles out of those oil galleys rather than forcing the air to leave through the lifters.