Forum Discussion
Bruce_Brown
Aug 07, 2017Moderator
Be careful with that one. According to the 2003 Neptune Brochure you have the Cummins ISB Low Torque engine rated at 275HP/600 lb/ft torque mated to an Allison MH2000 transmission.
Looking at the Allison Specs shows your transmission is rated for 300HP MAX with 780 lb/ft torque MAX.
HP wise you're close to the limit, and seeing as HP is a calculated number using torque and RPM, you really don't have a lot of room to play with that set up.
Bottom line - if you really want more power it might be time to start looking for a MH with a bigger engine and heavier transmission.
Am I helpful? :B :h
Looking at the Allison Specs shows your transmission is rated for 300HP MAX with 780 lb/ft torque MAX.
HP wise you're close to the limit, and seeing as HP is a calculated number using torque and RPM, you really don't have a lot of room to play with that set up.
Bottom line - if you really want more power it might be time to start looking for a MH with a bigger engine and heavier transmission.
Am I helpful? :B :h
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