Each airframe has it's own design form, fit, function limitations for the cooling system.  In the case of the Limo EZ, it is difficult to fit a Mazda oil cooler and a radiator with adequate volume.  Proper ducting and two types of heat exchanges will inhibit airflow and cooling through the system.  In searching for a radiator I found that NASCAR uses oil to air exchanges in conjunction with radiators to take care of cooling (C&R catalog).  I know that this was talked about before. Tracy experimented with water cooling the oil pan.  C&R integrates a 13 plate unit into the rad.  There are also remote mounted, 22 plate external oil to water exchangers available.  By using the available duct space for one rad, it could be 20" X 18" X 2.75"thick.  The duct would have only one core to provide uniform airflow to. Any thoughts on this?  Another observation; we use the 20" X 4" 2nd gen oil cooler successfully yet Mazda makes a 20" X 6.5" cooler for racing.  Racing places more heat loads into the system then an aircraft application?  Thanks for any help.

Joe Berki
Limo EZ