built rb25 neo oil control problem

[240sxrb25]

i have a neo rb25 thats built with cp pistons, spool rods, acl bearings and such. the motor has an N1 oil pump. the rear oil feed in the head is blocked, i have a rear head drain going back into the oil pan. i have the front oil feed in the head restricted. i am not using vct so i also restricted that passage as the neo has no restrictor for vct from factory.

i am having a massive oiling problem, where in one 1/8 mile pass my catch can is filling completely. the can is one port with a breather on top. both valve covers are connected and one hose runs to the can.

i have a proper pcv valve and a true check valve inline also between valve cover and intake.


this problem was so severe that a few months back i tore the motor down and remeasured EVERYTHING. all machine work is correct, and i re-ringed the motor a little tighter this time. the engine is still doing the same thing.

im running about 30psi on E85 making a little over 600hp. with ET drags in the back, the car is under more load than it ever is for three gears and fills the can insanely fast. is there another alternative such as bigger catch can with bug breathers and a return to the oil pan?

i know that motors this small with high boost experience block pressure, but are they all this bad?

please help me if you have first hand experience with high hp rb's and oil issues, THANK YOU