my brother has been starting his RC8 with this one:
http://www3.towerhobbies.com/cgi-bin...?&I=LXCLD9&P=0
running it on this 4s pack he got on ebay:
http://cgi.ebay.com/RC-LAB-3800mAh-1...3A1%7C294%3A50
turns over fresh motors easily, of course we always heat out motors up to around 170-180 b4 we start them for around the first gallon to gallon and a half. The lipo lasts quite a while too, and stays balanced really well...