adding for momentum is a winner. Not about missing teen speeding years.. tractor trailers still do it. same mileage at 40 tons and empty.
My greatest ecomod is bigger wheels, heavier.. and higher rated stiff tires...and alot of freakin welding (over 100 pounds added- and more to go)
I call the other direction of losing weight "the little inline four fairy tale". the delusion that you may get torque out of it one day starts with losing pounds, like a crack addict...and it keeps on going until death.
I may have an extreme here.. my old sube is 33.1 pounds per horspeower by oem standards, I am closer to 35 in reality...would not change it for anything...funny enough, I am out in the fast lane more than ever.
it is a good mentality to catch on to the momentum stuff, even aero conversations and chores start to go away.