[E-Revonut]

I would suggest skipping mechanical brakes and using motor brakes, much simpler and once your used to it I think just as good. IMO 5s is to much for your combination. I have found that gearing for low 30's (aprox 33MPH) has best overall performance on the track. I can still outrun the nitros on the long straight with this gearing, as well as being more driveable on the rest of the track and get great runtimes. On 5s it may not be possible to gear a 2200kv low enough to have usable speeds on your track. The 4s should be a perfect setup.

On that note your 4s pack is a decent choice. I have no experience with HobbyCity but I have heard their lipos live up to their ratings. A 5000mah 25C lipo can provide 125 amps (5000mah = 5A x 25C = 125A) That should be adequate to get a truggy around the track. I will estimate aprox 14min runtime on the track, but that depends on your driving too.

My setup is a RC8T truggy w/ LPR tires, 5s 4500mah 25C with a 1650kv motor, 50/14 gearing. I can make a 16min main without swapping batteries.