What are your bearing clearances? Even with my loose bearing clearances I have 20psi at idle with a ported oil pump.The lack of oiling is usually caused by lack of oil.
Not inadequate pump design.
That restricting orifice that you all take out so eagerly is there to hold pressure on the back side of the pump. Honda knows the dimensions of the oil passages, you would agree?
I get 7-8 PSI at idle after I ported and smoothed my pump.
5w-40 Honda recommends 5w-30
I agree with this. It's easy to do, doesn't take long, and costs very little.If you have a Y-series crank, port the pump.
If you are using a Y-series pump, port it and drill out the inlet to 12-13mm (about half an inch).
If you are doing anything with elevated RPM, port the pump.
If you will be using forced induction, port the pump.
Honestly, for about half an hour and a proper aluminum carbide and maybe a sanding drum or flap wheel, it's worth it to do any nearly any engine.
I get about 70psi pressure between 6-7k rpm, at idle I have 20psi. These numbers sound ok? The outlet on my pump was widened as per instructions in another thread on hereThe Honda service manual states that oil pressure should be no less than 10psi at hot idle and no less than 50psi at 3000rpm. I've learned, however, that flow is more important that pressure and that oil temperature is important as well.