Originally Posted by
deltahotel
Turned an overpowered C engine 757 into an even more overpowered 757 with the E4!
Never worked RB211-535 engine (my time on the 757 was devoted to the PW2000), but IIRC the primary difference between the C and E was the addition of a wide cord fan (the "E" was a direct response to the better fuel burn of the PW2000).