[DannoXYZ]

Originally Posted by adouglas

Sure it makes sense. Cooling pistons by oil jet is quite common. A lighter piston needs it, because there isn't as much metal there to use as a heat sink. Flip that around: if you design the oil system to spray the underside of the pistons so as to cool them, then you can make lighter pistons. Therefore less reciprocating mass, therefore higher rpm and faster acceleration, etc.

From https://en.wikipedia.org/wiki/Intern...engine_cooling

Yeah, I've always notched the con-rod to squirt oil under pistons. Just never used it as method to lighten a piston. I wonder what the 400 piston weighs... or what it's made of... cast? Forged? Hypereutectic?