rb26 oil pressure drop at idle when hot

[MODIFIED AUTO SPORTS]

i have a 98 240sx with a rb26 just got it up and running good i has a n1 oil pump in it if i drive normal the car is fine but when i drive it hard and gets hot the oil pressure drops down two almost 0 at idle im running 15w40 oil just wonted to no if anyone noes whats going one with it

obx 80mm turbo
obx main
3"down pipe
46mm westgate
880cc inj
aem ems
tomie 290 11.5 procams
and all the goods
n1 pump

[compactfean]

Do you have an oil restrictor for that turbo? What is your bearing clearance? Also does the n1 oil pump come with a new pressure relief valve?

[moso]

I too would be looking into the pressure relief valve.

[IanS]

what oil pan/pickup are you using?

I had a very similar issue with my sr20 when the oil strainer broke off the pickup tube. It was fine for normal driving, but if i did a few pulls, especially if i was cornering, it would lose pressure when it dropped back down to idle.