safe to run a 1717 on 4S in a truggy? pics included

[nuz69]

Under hard racing condition (europeean track), my 1520/1Y 6S geared for 39mph (13/46) in my mbx5t truggy last 12 minutes with 6S 2950mAh 35C hyperion. I don't want to use bigger batteries because I want the lighter possible truggy.
IMO the 1717 is useless and too heavy for a truggy (80-100 grams more than the 1520). The best truggy choice is (for me) the 1520/1Y. I even run a 1520 in my buggy on 4S, a little heavy (60 gramms more than the 1515) but very efficient.