Cooling Fan For blitz motor ?

If you have a blitz, you know what a challenge it could be the get a motor fan mounted.
Anyone have any ideas or Know of parts that will work? Im Running a Castle Creations Brushless. I have tried 16-21 pinion gear and 88 spur combos, my temps are still 180 -190. Help any one!

i think you can mount the fan on the rear brace thats on the rear bumper to the rear shock tower. just right above the motor by zip ting it to the brace.