1512 2.5D vs 3D on 5S?

[DRIFT_BUGGY]

I have currently got a 1512 2.5D (2050KV) in my 8IGHT and running it on 5S 5000mah geared at 41mph and it gets pretty hot 180F+ The 2.5D on 5S makes 37925rpm and most people recommend motor rpm's to be between 30K - 35K. I once had the buggy geared at 44mph and it was great (apart from the temp of course) had plenty of speed. Was thinking of giving the 3D a go and see if temps would go down. 3D on 5S makes 31450rpm which is 6400rpm difference. Is the 3D going to be able to run at 44mph or becuase it is a slower motor than the 2.5D it won't be able to run that fast without overheating?