i've only conversion built and driven the 8-T roller but i have no complaints so far...
track only use and mainly in open practice sessions and in 5-7 min. qualifiers...
i had to tone it down from it's origional 1515 1Y/F [4s-2p] 14 tooth pinion set up...
it was just too hot a set-up for our local [medium size, tight lay-out] track...
went with a 1515 1.5Y/F and NeuEnergy [5s] set-up lowering the peak rpm's by aprox. 5000 and amp draw by 30-40 amps making it easier control and giving us longer run times...
Thanks for the great info Ron. I'll be going to the Neu lipos too . . . I'll be running a NeuEnergy 6s 3900 in my XT8 this spring. Just ordered it last week. Now if only the CC and Tekin ESC's would hit the market I could get this thing built and provide my own testing feedback!!
Well, the thing I have going for me is time. I planned on building this truck over the winter so I've got a couple months. I feel pretty good about either Castle or Tekin hitting the market by mid February or the start of March.