My TOMEI pump was running around 130 psi on the lowest setting, installed a regulator which got it down to 90 at 6000rpm, kept spewing oil though, its got head drains and the catch can returns to the sump, internal drains have been drilled and chamfered, at this stage the VCT has a 0.6mm restrictor and the head is now feed with a 0.8mm restrictor which has been taped into the oil galleries, this makes changing the restricters a 5 minute job.
1 x 1.5 for the head, oil
1 x 1.0, oil
Changed head restrictor to 0.8mm
Still haven't tried out the smaller restrictor as yet.
Wakefield in March will be the next time the car is out.
This oil surge issue has done our heads in.
Goodluck.