[coolhandcountry]

There is johnny but not for the dual. A single big motor on the 2x5s lipo would kick some serious booty. If you want to try the 5s lipo on the 9l s you could. I have seen a 8l on 18cells. There has got to be a faster set up. YOu could lose the tranny for a center slipper for the higher gear ratio. and a little weight as well. Why only 5s lipo? 7 xl on 6s lipo would push you faster than the 5s. For nothing but speed why not.

edit: I ran some numbers. with the stock diffs, 6xl , 5s lipo, 20 51 gearing with the strobe, tranny in second gear, with a 140 mm tire.
top speed estimated at 67 mph. I don't know if the 9920 will take a 6xl with that kind of gearing. 7xl on 6s lipo would put you in 66 mph bracket with a 22 51 gearing. Let me see what other combos you may want.