Hmmmmm.... why does 6 pounds per horsepower ring a bell from my road race days?? You reduce the weight by 6 pounds you gain another Horsepower. Along those lines, not saying the are "spot on", you'd need another 30hp to match the performance of the lighter ski. My buddy loved the BIG BLOCK Chevys and used to say, "Go bg or go home."... LOL Good luck. The journey will certainly be interesting.