The anti-enthusiast, pimp-my-ride thread
Okay, so you know you’re on the wagon when you’re considering swapping out your 3.73 Limited-slip differential ( 3k RPM @ 70 mph ) for a 2.93 diff from a 325e. If my autocross days are over, then switching-over to a diff less mechanical advantage would cause immediate gains in fuel economy. *** nerd factor 4 time *** Using the calculator found Here gear rpm 3.73 (stock) 3025 3.25 2636 2.93 ...