I´ll give it a try.
Liquid cooling installation
The cooling machinery has to be considered functionally good and due to the radiators lower flow resistance (1.0 bar at 2600 rpm) much more stable than the installation of the Bf 109 G. Under German design rules, the cooler would be barely sufficient, its efficiency at full throttle height is at 0.96 (see page 2), but under British ones, despite the DB 605 delivering 150hp more than the Merlin 45 at altitude, it would be well appropriate. It has been noted that the nearly 50% smaller radiator of the Spitfire (surface of 17.4 dm²) only provides about 4% less of cooling capacity than the double radiator on the 109 G (surface of 2x 16,8 dm²).
The reason for the good efficiency of the Spitfire water radiator seems to be that the specific heat carried by the cooling water per (horsepower per hour) in the DB605 is lower than in the Merlin engine as has been measured at the DVL (Deutsche Versuchsanstalt für Luftfahrttechnik) and also the considerably more suitable location of the radiator, yielding a much better efficiency with a given frontal area.