Wassup honda lovers...I'm from Singapore and I'm driving a dc5. I've currently got some issues and was hoping that all the expert gurus out there can assist me on.

I'm running on a k20a block which was recently rebuilt with high comp wiseco pistons and Brian crower rods. I've replaced all my thrust bearings, piston rings etc for new ones. Even my oil pump is new. So here's the problem. This block was bought over from a fren. When the block was in his ride, his idle oil pressure is at around 3.0 x100 kpa. But after I took over the block with it being entirely overhauled, my warm idle oil press is at 2.6 x100 kpa.

So here's the thing. When my engine is on full load, my oil press is at 7.0x100 kpa. But after a couple rounds of hard driving. My idle oil pressure drops to a ridiculous low reading of 1.9x100 kpa instead of maintaining at 2.6x100 kpa. Rpm idles at 1k without fluctuAting. If I stop hard driving the car, it will slowly climb back up to 2.6x100 KPa.

I tried switching out my oil from 10w40 to 15w50. Even changing my defi oil pressure sensor to new ones. Still having the same issue. I'm trying not to remove the entire block to check the internals due to the high cost of labour. I seriously hope it's not an engine issue as I Juz built this motor about a month back.

So can any gurus/experts give any advise on what maybe causing this issue?? Your feedbacks are greatly appreciated!!!