The only thing Cat on the E Series is the transmission. I don't believe there is anything coming out of Jackson now with a Cat engine. From the fuel consumption and torque difference I have seen between the Sisu and Cat engines I just can't imagine why anyone would want the Cat engine.
I think noise levels are the biggest change, Sisu is very quiet. On a low power use seeding application I am not seeing much difference in fuel use or torque. Maybe in fall I can push them a little harder. From what I see the 16.8 liter Sisu is a suitable replacement for the 18 liter Cat, at least so far.
AN ERROR DOESN"T BECOME A MISTAKE UNTIL YOU REFUSE TO CORRECT IT
Orlando A. Battista