[highflier]

Ok Keep in mind 9s a123 is really like a 7-8S Lipo.

My setup 6s setup is identical voltage as a 5s Lipo.

A123 are 2300MAH packs. By going to 9s I should get a 33.333% increase in run time.
33.3 % higher voltage also.

My running style is kinda hard to use for total run time.. (Just bashing) I will tell you that my wife runs stock with 3300 MAH (6 cell NMHI packs) I run faster, and harder then her but only outlast her run time by 1 min or so. I would guess it is around 12-15 min of run time.

So the 9s pack should be around 15-20 Min of run time.

My setup is 6s1p A123 20/66 gearing. on a 9XL with BK warrior controller.

I am fast but not unbeleiveable. Maybe a 12xl would be a better motor choice.

32 Volts * 1251 = about 40,000 RPM's

1 9s1p pack is good for about 50 amps * 32 volts = 1600 watts of power at WOT
1 6s1p pack is good for about 50 amps * 21 volts = 1050 watts of power at WOT

I am sure there is heavy voltage drop so I would suggest figuring down 10%-20% in the real world.

Highflier