Take your 6 original jets and put four outlet nozzles on each of them, boom
Spot-on. “Honda V8 Development of piston oil cooling jets”;- In the initial stages 4 and 6 hole were used in the oil jets. The flow rate injected was higher than 10-l/min. as development proceeded the oil flow rate was steadily increased by means of increasing the diameter of the jets holes from 2mm, but with the use of MMC pistons this modification was not needed. When MMC pistons were banned and returning to the 2000 aluminum pistons crack were getting into a big problem with the increased engine speeds. Increasing the volume of oil flow through the jets simply increased friction. An interim measure was retarding the ignition by 6.5 degrees which resulted in a decreased output. What was needed was an even spread of cooling oil over a wide area which was achieved by the 6 hole per jet per piston being increased to 12 holes and finally to 24 holes.
'Semi-hijack???' Solid and official technical information is always welcome. just one point if you don't mind. you omitted mentioning that that those piston/oil cooling jets illustrations pertains to Honda F1 V8 engine.
Cosworth CR-3 (external designation) CK family (internal designation) = CK 2001 used by Jaguar R2.