Hi Guys

I always find it more helpful to look at working systems to inform the theory.
I believe the figures below are in the ballpark.
  
                                        Radiator Cu in        HP              Cu In / HP    Engine
 Dave Leonard               425                         200                 2.1             2 Rotor Turbo
 Ian Beadle                     375                         180                 2.1             Renesis 6 port (poor inlet manifold)
 Tracy                                550                         270                 2.0         3 Rotor NA

Ian runs Evans coolant and temps around 220F, and is in Perth Western Australia where our temps are in the mid 30C of 100F in Summer.
Each of the above have a different radiator and duct setup.

Merry Christmas and Happy New year to everyone.
PS Thanks to everyone that makes the list so helpful.
Special thanks to Tracy, for the gear and trustworthy intelligent insights.

Steve Izett
Building Glasair SII RG Renesis 4port RD1C EC2 EM3
Perth Western Australia

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