Nice thanks man. The price is right.

I agree with the last part, so that's why 5S is also valid option (33.300rpm @ 3.7v). The 1520 and 1717 would be better off with 6S.

(very) General rule of thumb:
2200kV< = 4S
2000kv = 4S / 5S
1800kv = 5S / 6S
1600kv> = 6S

For some reason I don't like running things on the edge of their capabilities like 6S, though I think I'm going to with my 1717 in my Savy XL.

You guys are killing me. So if I run 4s it's going to be a dog and 6s it's pushing it's limits at 39,000rpm.

What's misleading are the articles that are published on the Flux 2200 and the Flux 2350. People run the 2200 on 6s all day long and it's an animal. The 2350 is supposed to be a blast with 4s. With that said I was looking for a motor above 2200 so I could run 4s with lots of power. I was guided into a lower kv so I went with the 1800kv because it would be great on 4s and crazy on 6s. Now I'm either under powered or over powered.

I'm going to go buy a 1717 and just try both on 4s and 6s. Which ever one I don't care for I'll sell and try to break even.

Ok. I ran the truck for the first time this weekend on 4s. I actually had a blast with it. At 12.3 pounds it's not a speed demon on 4s but very torquey. It will do rolling wheelies with no effort. I ran for 35 minutes on 3800 packs and still didn't reach the LiPo cutoff. I have a feeling it's under geared. I'm running 17/49. The motor was barely warm.

My buddy has the same 1518 in his E-MAXX and was running 6s. Holy crap was that out of control. I can clearly see the difference.

My 1717 arrived yesterday so I'll play with that once I buy some 3s packs.