What is getting hot?  Water or oil?  Both?  It looks like you might have problems with the oil due to the restricted outlet for the air.  It is smaller than the inlet and should be larger than the inlet.  If you use a spray bar, it should be a fine spray.  Almost atomized for best results.  That means high pressure and fine nozzle.

Can you taxi during these tests?  That will assist in air flow if you can.  Don’t get too far away incase you have to shut down and push..  J

 

Bill B

 

 

Gents,

 

I am doing the higher power ground runs now, and am only able to run for about 5 minutes before reaching 195* or so.  I’m looking for ideas on how to extend the time for each ground run.  I was thinking of adding a spray bar like others have discussed.  My thought was to drill some holes in some PVC and connect it to the garden hose.  Then put it in the intake in front of the radiator.  I would have to run the hose out the front and clamp it down so it doesn’t come close to the prop.

 

I’m open to all ideas though.

 

I’ve attached a picture that shows my radiator and duct work.

 

Thanks,

 

Chris