Lipo for 3 different Emaxxes
 

I want to convert to Lipo without breaking the bank.
Need Lipo/charger/balancer recommendations for my E's
Setup 1: stock
Setup 2: 1930/5 Lehner with a BK19150
Setup 3: Duel Hacker B8s / schulze 66ce

Option 1: 4S for the stock and the Lehner setup and (2) 3s for the Duel setup
Option 2: Sell the duel setup?
Option 3: ?

Is 4S too much for a Hacker B8S?

I'm not that familiar with the BK19150 or Schulze 66ce, but you definitely need an LVC for Setup 1.

IMO, 2 - Trakpower's would be enough for any of those setups. And actually, 3s is more than you should put to an 8S.

Set up one would need an LVC like previously said. You would better off sticking with NiMh IMO.
Set up two - assuming it's a car controller which I don't see on the website, it should be good up to 191amps? A 1930/5 is rated at 4180kv, not sure if that is loaded or not but it would bring your 1930/5 close to 60,000 rpm's on 4s if it's loaded kv rating, would also need an lvc.
the duals, dump'em IMO and get a single motor set up or take tha money and invest in lipo.

is it not a warrior 15020? 20 cells,150 amps.

is the 1930 a high-amp version or is it the standard version with the solder on the back.If it's the latter it can be reconfigured for a lower kv,that might just work out nicely for 4s.