How exactly are people getting long run-times?

[Snipin_Willy]

Wow, 6s 6100 in a buggy, and ~20 min? I have a 5s 5200 in a truggy and I'm easily getting 20 and I know I get 30 min bashing. How freely does the buggy roll with and without the motor pinion engaged?
I saw someone at a track with his pinion way tight against his spur and he was complaining about punch and speed. It could have been his batteries, but the tight mesh certainly wasn't helping.

[Marvin]

It's definately free, there's no binding, and when my rotor failed on Sunday, I took the complete centre diff out (with motor still attached) and I was able to spin the spur/pinion combination like a clutch bell with those really nice 'almost failed' bearings that spin really freely.

I just thought that the tracks we race on in the UK aren't anywhere near as smooth as in the US, and also we have fewer jumps, which don't take that much throttle in comparison to sweeping corners, so presumeably the run time will be less anyway.