Forum Discussion
blt2ski
May 16, 2018Moderator
Another way to look at Mr Murphys way of thinking.....
If towing at 20K lbs lets say. you have three engine options, a sb V8 rated at 18K gcwr, a BB V8 rated at 20K lbs, and a TD rated north of 22K lbs. You T-bone someone and kill the driver. Is the driver more dead because you had a SB8? dead due to a BB8? Or less dead due to you being way under rating with the TD?
My 6.5 TD in above post, I could pull 20K lbs in 1st gear up a 30% grade. My 05 Dmax with double the gcwr could only pull 20K lbs up a 24% grade before stalling out. Which is the better TV? Yet on a 3% freeway grade, the dmax would go 55mph, the 6.5 around 40 in the gear below direct. The dmax was in direct, both doing around 2700 rpm! Obviously I hope, the extra HP the dmax had, allowed it to go faster up a lower % grade. But the overall lower gearing the 6.5 had, along with all of 200 ft lbs less torque, allowed to to pull a steeper grade before stalling out. My Navistar with a 174/330 non turbo IDI 7.3 V8 diesel, can do 30K lbs up a 30% grade. Then again, with 4.33 gears, a 10.08 low first gear......
At the end of the day, ANYTHING can pull a trailer, how well it does, depends upon your person performance needs on a given day. For me, the above three trucks, the dmax was the worst one! it stalled out once, the others have NEVER stalled out on a grade. Yeah it went faster up a freeway grade, but it did not get to the camp or job site if the grade is steper than 25%! The others get their!
marty
If towing at 20K lbs lets say. you have three engine options, a sb V8 rated at 18K gcwr, a BB V8 rated at 20K lbs, and a TD rated north of 22K lbs. You T-bone someone and kill the driver. Is the driver more dead because you had a SB8? dead due to a BB8? Or less dead due to you being way under rating with the TD?
My 6.5 TD in above post, I could pull 20K lbs in 1st gear up a 30% grade. My 05 Dmax with double the gcwr could only pull 20K lbs up a 24% grade before stalling out. Which is the better TV? Yet on a 3% freeway grade, the dmax would go 55mph, the 6.5 around 40 in the gear below direct. The dmax was in direct, both doing around 2700 rpm! Obviously I hope, the extra HP the dmax had, allowed it to go faster up a lower % grade. But the overall lower gearing the 6.5 had, along with all of 200 ft lbs less torque, allowed to to pull a steeper grade before stalling out. My Navistar with a 174/330 non turbo IDI 7.3 V8 diesel, can do 30K lbs up a 30% grade. Then again, with 4.33 gears, a 10.08 low first gear......
At the end of the day, ANYTHING can pull a trailer, how well it does, depends upon your person performance needs on a given day. For me, the above three trucks, the dmax was the worst one! it stalled out once, the others have NEVER stalled out on a grade. Yeah it went faster up a freeway grade, but it did not get to the camp or job site if the grade is steper than 25%! The others get their!
marty
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