[SpEEdyBL]

Depending on the size of the track, you'll need somewhere between 4,000 and 5,000 mAh on a 4s pack for 15 minutes. Despite higher voltage and a low kv motor being slightly more efficient, I still recommend 4s as it sits lower in the chassis. As far as a motor goes, I wouldn't run anything besides a tekin Rx8 motor. Simply put they are very efficient (at least mine is) and they are built for cars, and only an oz heavier than the novak motors. Neu motors have stiff wires which will fatigue and fail over time, which is why i wouldn't recommend them. Anyways, skimping on electronics is the worst way to save weight imo from experience.

For my 8ight, which is exactly 7.5lb with Aka City blocks and a Zippy Flightmax 4s 5000 mah battery, i get 18 to 29 minutes of runtime depending on the track and motor temps no higher than 130F with the Tekin 1900 kv motor, which is plenty. It's faster than nitro geared 16/46, but 14/46 is all i ever need. I have tried many 1/8 motor, battery, esc setups and this one is rock solid. Esc is the Mamba Monster w/ no fan as it just causes problems and is not necessary. For a grossly overpowered setup that will awe the nitro fans, just run 5s on the same motor, but i doubt it will ever improve your laptimes unless you are on a 200 ft track. For bashing on the street. i run 6s and it's pretty sick.