Even
without further info I can suggest that the optimum for overall system
design is going to be with a loop delta-T in the range of 20-30 F. So
at 225 hp is going to require 27 – 35 gpm for pure water, and about 37
– 50 gpm with 50/50 water/glycol mix. Of course it is difficult to
detmine ‘optimum’ heat exchanger design to go with it. Lower
flow/higher delta-T needs more exchanger area, which is determined by
airflow requirements. Steady 225 hp will need something around 6000
cfm air flow on a 90F day.
I
measured pretty close to 50 gpm @ 6000 rpm on the dyno with no
thermostat and unknown cooling loop pressure drop.
FWIW,
Al