Brushless system advice needed for J concepts BJ4

[glassdoctor]

I ran the original ss5800 in my xx4 a few years ago. It ran pretty well actually and never thermalled. But I had one of them that would run 220* and not thermal. :)

I would recomend a Sphere Comp/3 star combo or a MambaMax 5700/6700.

If you have a working ss5800... by all means try it before buying something else. It doesn't have lipo cutoff software but other than that it should work fine. Assuming the track is smaller (indoor) you probably don't have to be ballistic to compete, and the 5800 isn't exactly slow.