Detuned 6.7 diesel in Ford Super C RV
I was looking online at a Super C based on the Ford F-550 chassis. The specs on the Ford website are 330 HP/ 750 TQ, while the specs on a "non-commercial" F-350 are 440 HP & 925 TQ. When a manuf...
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Actually, torque multiplication is what gets the load going! Hence why my MDT with a whopping 330 lb ft of torque can pull 30K up a 30% grade, meanwhile my 05 duramax was limited to around 25% with a 20K load before stalling out. Power was there, but gearing was not! A lot of times, for how some MDT's are used, the top speed is set at 55 based on gearing, then they figure out the HP needed to move that load, and put an engine in that has the HP needed from a speed stanpoint, but gear, tire diam and trans gears setup the how little or steep of a grade you can pull in 11st gear.
I have spent many miles with the pedal to the floor going up hill with my non turbo idi 7.3 with its whopping 175hp! But I do get there, never have I stalled the rig on a hill/grade. Meanwhile many of the 35 series rigs I have had, with higher HP and torque motors, due to the crummy, ie really tall gears in trans, and axels, I have not gotten to the top of a grade because I stalled out! Blew up an auto tranny or three this way too!
Hence why I have learned, it is better to be underpower slightly, with a proper geared rig, than an over powered rig, with incorrect gearing for the task at hand.
Marty
I have spent many miles with the pedal to the floor going up hill with my non turbo idi 7.3 with its whopping 175hp! But I do get there, never have I stalled the rig on a hill/grade. Meanwhile many of the 35 series rigs I have had, with higher HP and torque motors, due to the crummy, ie really tall gears in trans, and axels, I have not gotten to the top of a grade because I stalled out! Blew up an auto tranny or three this way too!
Hence why I have learned, it is better to be underpower slightly, with a proper geared rig, than an over powered rig, with incorrect gearing for the task at hand.
Marty
