According to BrianG's calculator, I am at about 39mph, but it sure feels like 45 to 50. :yes:

I was running a Mamba Max, a CS-5700 on 3s Maxamp lipo and it was fassssst. But it was running a little hot so I changed to a Feigao 9L, was able to gear up for even more speed and the lower kv motor runs ice cold.