I know it can run without, We have long hair astro and high grip so it does take a bit of a toll on the electrics.
But with the fan I have now you have to addmit that coming off a "to cut off" run with a 5800 lipo with the motor at @ 35° is quite a good sight to see on the temp gun.
Im loving the Vampire motors, just need to get one for the 2wd
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