Would they increase or decrease mileage or would mileage stay the same?
generally speaking, replacing rotating assembly with a lighter part will slightly increase mpgs. That's assuming you maintain the same compression ratio.
but if your building a motor you gonna be likely putting more fuel into it you have to look at all ends of it if your building a motor up you r usually not concerned about MPGs
JBO since July 30, 2001
It will only increase gas mileage if you put port holes in them to allow the gases to get by.
FU Tuning
Wont forged pistons require warmup unlike cast pistons? If im right, thats a difference when switching to forged pistons.
'00 GMC Sonoma 2200
'02 Chevy Cavalier 2200
