4S in Buggies

[DRIFT_BUGGY]

Originally Posted by MetalMan

4s is often plenty to surpass the nitros in both acceleration and top speed. I'm running 4s with a Neu 1512 2.5D/F in my Hyper 8, geared for ~45mph, and everything (MM + batts + motor) run at very acceptable temps.

What gearing do you use in the Hyper 8? To get the 8ight to go 45mph on a 1512 2.5D & 4S would require a 17T-18T Pinion and 46T Spur. On 5S would require a 14T pinion. What run time you get?
How much extra run time would I get on using a 5S 5000 instead of a 4S 5000?