use of 4S or 5S vs using 6S

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I'll agree for speed passes to be at 6s lipo... you will get the most by a longshot w/ the highest voltage possible. But if you bash or expecially race voltage is less of an issue from 4s to 6s, just make sure your motors RPM's are in the sweet range 30k-40k and other than making sure you stick to track rules or proseries or event rules you'll be good. It's funny in theory 6s is a lot superior as Oppressor states but when it comes to real life application trust me my 4s erevo can run faster and longer on a Neu 1.5d (120amp) vs my losi 8ight truggy on 5s or 6s with a Neu 2.5d (80amp) both running 5k packs.. drop in the 4s 8k packs in the erevo and it's not even close....