full floating wristpins vs. pressed wristpins

Floating pins don't necessarily free up horsepower as much as they relieve a little stress and friction. Stupid as it sounds, they allow some extra movement for the piston to minutely "rock" back and forth in the bore and that action relieves a little stress on the entire small end of the rod. I've seen some "machine" shops set up floating rods just by honing the little end until the pin will slide through and go steel on steel. I have always advised against that. Go the extra mile and bush the small end of the rod. You won't regret it. ....but like has been said before, I am not even sure you'd see the difference on the dyno. It is more of a durability/heavy duty type thing.