well I can tell ya what Id run to achieve your 2150... with 13 tooth pinion.
500kv x 44.4 voltage= 22200
116 main gear divided by 13t = 8.9 gear ratio
22200 / 8.9= 2494 head speed
now to acct for castle headroom for Governoring
2494 - 15%(headroom)= 2120 Head speed. While this is more like 14.9999 lol, it'll still put you in the pocket of where you want to be and run efficient where your stuff will come down nice and cool!!!