kzspree320 wrote:
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Daveandviv - Your rig is very close to what I'm talking about. I've never had a grade I could not pull at 60mph with the Cummins. I was actually on I-70 outside of Denver and know it will pull it at 60. Doesn't mean I would, because a lot of Colorado passes just can't be pulled that fast. While I would expect 30 mph with the Chevy 6.0 on that grade, I would have expected at least 45 mph on the grades in the eastern US, since the lower altitudes have not taken away quite as much HP as the higher CO passes.
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Thanks to all. Keep the info coming. Keith
I could be wrong but would not expect that much of a difference. Yes the 6.0 will be down about 100hp on the Eisenhower pass, but 100hp doesn't equate to half the speed. It would really come down to if it can pull 2nd, and that would likely depend on the axle gears. I would guess 45 - 50 mph in that scenario, but I am just guessing as well.
As an example, my meager 3.7 and very tall trailer shaped like a brick, with the truck maxed out with a quad in the box, had no trouble pulling 60mph to the top. Yes foot to the floor, and engine was revving, but when the hammer is down, it's all about horsepower...But that is the only time I have found a gasser to be wanting. But it wasn't a gas vs diesel thing, it's a turbo vs NA thing anyhow!
