As some of you may know I added an evaporator core to my cooling system a month ago. Full throttle climbs resulted in cooling temps peaking around 170 degrees. The problem was in cruise flight the water temp would drop to 140-145 degrees. This was running at 6000 to 6500 rpm. Yesterday I installed a heater control valve to the evaporator core. Test flight results are as follows. OAT was 27C. Full throttle climb to 3000 feet water temp was 170 degrees. Level at 6300 rpm 165 mph indicated water temp stabilized at 172. Closing the valve water temp was slowly rose to 200 degrees opened the valve and within 1-2 minutes water temp was back down to 175. At about half open the water temp stabilized at 185. I will try to post some pics soon.

Jason Hutchison

(On to speed mods!!!!)