Forum Discussion
transamz9
Mar 04, 2017Explorer
4x4ord wrote:ib516 wrote:4x4ord wrote:
It looks like they need to run the new 445 HP/ 915 lbft Duramax up against the old 397 HP/765 lbft engine.
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They mention that run in the video and state it was 1400# less than this current load. This load, the trailer alone was 22800#, and they don't mention people/cargo weight. Environmental conditions can have a slight effect too (wind)?
Look at it this way:
The old Duramax with 397 HP and 765 lbft of torque was able to lift 29650 lbs 2100 ft in 588 seconds. If you do the math: 29650x2100/(588x550) you find it did work requiring 192.5 HP plus whatever it took to overcome air and Roling resistance....Likely another 80 HP or so.
The 2017 Duramax lifted 31750 lbs 2100 ft in 615 seconds. Multiple that out and you find it put 197 HP to the pavement plus the 78 or so HP required to overcome drag and rolling resistance.
I'm not seeing the additional 48 HP and 150 lbft of torque that Chevy is claiming.
Torque management, simply put. If they didn't control these beasts electronically they would destroy their gear boxes in short order. These trucks are being built for the everyday mom and pop to use that have no idea how to use the tools full potential without tearing it up. The manufacture has to build in safeties to protect their product. In the good ole days one could use the advertised numbers to gauge the trucks ability but now the need to have a new stardard adopted showing numbers on the ground.
What most people dont understand is that the two V8's in this test have higher hp ratings that the mighty I6 but they get those numbers through RPM. If you don't have enough torque on the ground to get you to those higher RPM the hp numbers make no difference. I would love to see them do that same test with a Ram with 3.42 gearing. Other than taking a little longer to get up to speed i would bet it would be extremely close on average speed climbing the hill.
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