Originally Posted by reracer

I think you need to understand that there isn't a huge difference in weight, performance or runtime between a 2050kv motor on a 5000mah 4s and a 1400kv motor on a 3300mah 6s. The batteries have just about the same amount of energy in them and they weigh almost exactly the same. Yes, the 6s system is slightly more efficient, but not much.

To get better run times find a more efficient, lighter weight motor and shave some weight off of your car. I run an inexpensive Leopard 1900kv 4060 motor that's about 60g lighter than a Tekin buggy motor. I get about +15min of run time with a 3300mah 4s Turnigy 35-70c (360g) with very little heat buildup. My car weighs 7.2 race ready.

Also make sure your drivetrain is super smooth. Drivetrain drag = waisted energy. Lastly, I think that lighter wheels and tires make a huge difference in run times also.

Just my .02