Arouse the DAMPFHAMMER!
Thanks for your overview Lotus. Very nice! Yeah, that's a good assumption in my opinion too. I took 20 l/min as the K20 engine has oil squirters and the bearing clearances of the main bearings are on the higher end. Also I will run the oil at higher temperatures as Honda series. Therefore 20 l/min seemed to me a value covering all the given aspects....I would say you won‘t be too far off calculating with 10-15 l/min.
I thought about doing a Oil Pump test bench: pump, oil supply volume and a back pressure variable outlet. But I run out of budget before tuning, the upgrade for pump and cooler was 1.2 k, old stuff like pump, cooler and ECU 506 are still for sale. The last bill for the engine mechanic is payed, electric and tuning is on the list of things which need budget.If one has a spare block, you could actually force feed it with a low viscosity oil (to simulate hot oil) pressurized at 5 bar and measure actual flow.