oil circulation or just pressure?

[ebola]

Im building billet two cylinder engine for half scale dragster.It is built from plain alluminium block.Im wondering if I really need conventional oil pump? Im not sure how much benefit we have from oil circulation in dragrace engine.Isnt just enough to keep oil lines under pressure while running? It is pushrod engine, runs a minute maximum.Im wondering if I pressurise little oil tank and give a constant pressure thru engine lines to my gauge, would it any unexpected problems occur or not?
Thanks for input.
Andrius

 

[izzmus]

Hudsons used splash lube for engines at least up to 125hp, and sustained speeds of 5000rpm with little difficulty.

Windage-by-design, intuitively, would hurt power more than a proper oil pump would draw, though. I wonder how such a test could be run...