[RC-Monster Mike]

This thread is a little confusing, so let me clear it up. The 10L will run excellent on 14 cells. It will have a nice power output and will run pretty cool as well as have a nice runtime. On 16 cells, it will be even faster, and if geared down a little, it can provide longer runtimes as well (vs 14 cell operation). The 9L will be a little faster than the 10L on the same cell count and same gearing, with a slightly shorter runtime. The 9L is a great motor for 12-15 cell operation, while the 10L runs very well with 14+ cells (will actually run very well with 12 cells, but won't be the huge powerhouse it is on the higher cell counts. The 5mm shaft is receommended for heavier trucks, as it is a lot stronger.