Sounds perfect to me. The benchmark seems to be 10lbs for every 1K rpm.
Agreed.
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Pressure will increase up to whatever the max pressure the pump will produce, with the pressure spring that's in the pump. If the pump reaches max pressure at 5000 rpm, the pressure won't go up significantly, at a higher rpm.
In my 455 bracket racing engines, I used the 60 lb rated Melling M54DS pump, But I shimmed the pressure spring a little, to give me closer to 70 psi.
What you might be talkin about is that most say you need more oil pressure for higher rpm engines. I've read that some say you need at least 10 psi for every 1000 rpm. And, many say you need a little more pressure than that for the big journal 421, 428, & 455 blocks. Oil viscosity & bearing clearances affect oil pressure.