Posted 1/19/2020 11:49 (#7985521 - in reply to #7984651) Subject: RE: About 4-5% more if 9370r is fully loaded a full rpm and 9420r....
East Central Kansas
Is run at reduced rpm at roughly the same power output. (per Nebraska tractor test lab). In general, I like to run an engine that is rated at the lower end of it's power range rather than at its highest rating, let alone boosting it even higher.
I can't comment on the longevity of the two engines as we haven't run the 13.5L beyond 2500hrs.