Jerry
                         My 2.85 system will run all day at 6400rpm 180 MPH coolant sitting

               on the

                    thermostat. RV6A standard air inlet and 7" X 2 1/2" inlet for oil. Extra
                    oulets at the side which need adjustable flaps. I intend to have max RPM at
                    7200 when I get the inlet to the engine and prop. pitch sorted. I will let
                    you know when it goes faster than You Know Who.
                    Ian

          Ian,

          Do you have any current pictures showing your oil cooler installation,
          inlet, and ducting? What sorts of oil temps do you see and at what ambient
          temps?

          Mike Wills

Ian, I must have missed your original post somehow. It is encouraging to hear that 6000 plus rpm are working in the real world. Since you are using conventional RV inlets, I assume that you have cheek rads. What is their size? Also, do you have any cooling problems during long ground operations? Lastly, are you using the Mazda oil cooler?

I think you have proven that 42 sq. in of inlet area (RV 6 cowl) is sufficient to cool the rotary at sustained 6000 plus rpm. Others have not had the same result. Why do you think your installation is working so efficiently?----Jerry

First let me say RPM alone is not the final criteria. One can have high RPM
with a prop that is not adequately pitched and therefore the engine is
generating less HP than one might assume based on RPM numbers alone.
The intake manifold pressure  determines the actual HP generated at that RPM. 

Ambient temperature determines the rate of waste heat dissipated.
Liquid cooling is very sensitive to ambient air temperature.

Just to make things clear.

Be that as it may and assuming Ian and Ed Anderson have about the same HP.
Probably Ian has adequate air outlets like Ed Anderson who also uses stock
inlets. Note the louvers.

Paul Lamar
 
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