Best option to go faster....

[MetalMan]

30mins on a 1512 2.5D? You could gear up for sure. Here's my setup:

-SH buggy, with 38/11 diffs
-same motor as you, finned can
-geared 18/44
-4s 4800mah 20C Lipo
-about 45mph top speed and ~15mins runtime

[Trick440]

On a real hot day it tested at 118 for the motor and esc, and about 110 for the battery.

I was thinking it felt a bit weak in the midrange,.. Like a large grass jump its not pulling, its slowing down. So I think gearing up would make that worse.

I think my gearing is 17 pinion, 54 spur. STD revo tranny locked in second.
Flightpower 30C, 4500mah
Center diff.

i know my top speed is no where near 45, I would guess 25...