[E-Revonut]

Since you are using these for drag racing and I would assume there is time between runs and the runs are short I would think that removing the fan and the top of the case wouldn't be to harmful, other than voiding the warranty. I doubt your gonna heat up the esc to 160*+ in 1.4 seconds, and even if you did your not maintaning it for any prolonged time so the fan would essentially be useless, and removing the top of the case would allow the heat to disipate more easily after the run while it's sitting in the pits.