Hobby King Rattler 1/8 buggy on 3s

So I swapped out the stock 40 amp ESC and 2700 KV motor from the Rattler wasn't very impressed at all fun buggy butt why underpowered I added 60 amp hobbywing ESC and the VXL Velineon motor 3500 KV with a 3s Turnigy lipo the buggy is now faster