High pressure oil pumps put more heat in the oil, you don't want that unless it's a reasonable or worthwhile trade off for oiling needed high rpm and or major oiling system mods clearances . Fact -anytime you compress a fluid you make heat.
High volume will suit a loosely clearanced motor under 7500 rpm or one with opened up/modified oil gallies and closer to stock clearances. Whatever combo of loose or tight or modified...you compensate accordingly.
Note that as long as you have 7-8 psi per 1000 rpm, it will live.
