Motor Temps

[DaveG28]

All, having a bit of an issue with heat, and struggling to solve it!

Running a 6.5 in my 4wd buggy, and no matter what I do I finish races at 180-190f... I have gone with both larger and smaller and same size pinion as others running the same car (sworkz), I am down to 30% punch on my esc (viper), blinky mode, minimum timing on motor (which is 20 degrees).. I am now running a fan next to the motor also. Drivetrain is free, mesh is ok (It would survive a bit looser but is not tight and has good play)...it still overheats and it is also still monster fast (except top end which is "meh")...

...so, what else can I try? Should a 7.5 run cooler? I assume adding timing always adds temps?