Oil pressure problem

My last motor crashed because of oil pressure issues. I redid the motor and installed a high volume/high pressure pump. When the car is cold the psi goes to 40 at idle then maybe 50 under wot. After its hot the psi drops to about 15-20psi then 40 under wot. The spring I have in the pump is supose to yield 70psi under wot. Not sure if my oil cooler is causing the problem. Before my last motor was pulled I had a standard pump/volume. My pressure was 40psi when cold 25psi hot (this was at idle) 40psi under wot when hot. After I experianced the problem my car would not go past 30psi under wot. So im not sure my problem is fixed, thinking the high volume pump is picking up the slack. I have checked my bypasses in the oil pressure system and nothing is stuck. Only thing I can think of is the oil cooler, anyone have problems with these? Or any other suggestions?

Thanks

....... from what I have seen Its the stock oil cooler.....,Im am having the same problem as you....im going to remove mine because I put in a bigass Earl's oil cooler before the blower...however..I may just buy a new stock one with new lines because its cheap...

....Heh.....your old blower is working well for me....:D

It was the oil cooler