[RC-Monster Mike]

Hot-n-cold was pretty accurate with his advise. The 9918 warrior should handle the current for a speed run, but I would recommend dropping the gearing for bashing (or use first for bashing and 2nd for speed runs as hot-n-cold suggested). The 7xl can pull some current, so the best bet would be to get a speed control, that is a little more in the safe range (18120 should work quite well). On 16 cells, the 7xl will be quite a powerhouse for sure and will easily push 50+ mph. I would make sure you have cvds and upgraded diffs at the least. Your truck could lose over a pound easily by switching your tire/wheel combo to something along the lines of bow-ties (very light). This will make a big impact on run time, heat and current draw as well, because it is pure rotating mass that you are saving. My aluminum race maxx weighs just over 8 pounds (aluminum suspension, diffs, chassis, bulkheads, shock towers, cvds, etc.).