Increasing the water flow only has a minor impact on radiator efficiency once a threshold is past. Fans have a much greater (10x) effect.

However, if the delta in the unreported water temp to core was 10C, the 1.7C represents 17%. That could be significant in a way. Although Liquid Metal Pro may have a greater impact.

Martin, how about making some Fuzion mods instead of new block? I'm thinking a stepped base plate, different nozzles for both the inlet and scavenge could add a bit.

P.S.
Are they going to let the Seattle girl go in Perugia?