First the B4's: (Green one is running 8 cells, Red/silver is running 7 cells, 5700Kv motor)
http://www.youtube.com/watch?v=NzGW6...6358DF&index=1
Then The F201: (6 cells 3600 Elite, Mamba Max 7700Kv)
http://www.youtube.com/watch?v=fUohK...6358DF&index=0
The F201 is severely traction limited on the asphalt, and yes, it does lay rubber on concrete. The red B4 (mine) is running super-cheapie 3epower cells, which are supposed to be 3300 mAh NiMH, but only charge to around 2600. It's put together with spot welded tabs and big strand wire...in other words, about the worst possible manufacturing methods known to man, and still manages to do pretty well. I did change to the well built 8 cell later on in the video, but the 7 cell cheapie does pretty darn well. I did put a small 3S in mine, just for testing. It's crazy on 8 cells and going to be insane on 3S, when I get a proper sized pack.
Anyway, haven't posted much here lately, but thought you folks would like to see what i've (we've actually) been up to!
Sleebus