275 HP Cummins diesel on a 31' coach
Ok, so our search for the next RV is ongoing and I have expanded it to included the smaller sized DP coaches. Tiffin has a 31' Breeze that has a 275 HP Cummins diesel that produces torque of 560 at ...
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The rule of thumb is NO MORE than 100 lbs / HP. So adding your GVWR + the toad weight, and dividing by 275, comes to 101.5 lbs/HP.
So that rig is just over the recommended. You might check to see if the engine can be chipped for more HP (usually no more then 50 HP if I recall is possible) and if the tranni could handle the extra HP, but only if the RV is a great deal.
And of course, it never hurts to just go up hills slowly. My old '94 Cummins 190 HP would occasionally get down to 25 MPH going up a long hill and sometimes even as low as 15 MPH, BUT, it got a good solid 10 MPG too.
Now with my 330HP Cat, I'm at 88 lbs/HP so I'm pleased with that, but it only gets 8.4 MPG.
So that rig is just over the recommended. You might check to see if the engine can be chipped for more HP (usually no more then 50 HP if I recall is possible) and if the tranni could handle the extra HP, but only if the RV is a great deal.
And of course, it never hurts to just go up hills slowly. My old '94 Cummins 190 HP would occasionally get down to 25 MPH going up a long hill and sometimes even as low as 15 MPH, BUT, it got a good solid 10 MPG too.
Now with my 330HP Cat, I'm at 88 lbs/HP so I'm pleased with that, but it only gets 8.4 MPG.
