Forum Discussion
158 Replies
Huntindog wrote:
I think in hot weather, it will be a different test.
For the first time, I have seen, the Ford performed the way one would expect according to it's ratings..... BUT.... It was cold and wet.
So what I always felt was the reason for Fords previous lackluster performances was less/no factor::: Defueling to protect the motor.
With all of the cooling enhancements GM introduced this year, I would expect it to do much better against the competition in hot conditions.
There are some other factors that may be in play as well. I just don't have enough info at this point to make a good call on them.
Yep. I would wager that if the outside temps were in the 50s or 60s then the times would have identical and if the temps were in the 80s then the GM would have had it. The coolant temps were already in the 220s according to their comment and they would have not doubt been much higher in hotter weather since it has to keep the engine heat and hot compressed air coming from the turbo cool. There will eventually be a point that it will not be able to keep up and the intake air temps will increase which will also increase EGT's and engine temps causing it to cut power.
Since air cooled intercoolers on the Ram and GM trucks rely on outside air to keep them cool, they are not effected by coolant temps so they can sustain higher power levels for longer intervals. They are ,however, more effected by heat soaking in stop in go city driving where there is not enough air going over them to to keep them cool. I kind of hope that they will run the Ram in cold temps just like this test because hotter temps would effect the outcome even more, but I doubt it.- So, just to go back and think about times up the IKE where the GMC tied the Ram w I think 16,000 lbs.
1). What weight would you have to tow to start seeing a difference in times up the IKE?
2). How many RVers are going to tow 30,000 lbs?
3). I think we can all agree they are all great trucks. Right?
So if I attempt to answer my own questions,
1). Since TFL limits the speed to the posted speed limit, there would be very little difference for times up the Ike for at least 90% + of RVers. Not many RV’s over 20,000 lbs. yes there are some but I’d guess less than 10-20%.
2). I think I answered that above. But for RVers, I believe we have reached the point w all three trucks, for what we normally tow, there will be little difference in performance.
3). I think you all will be surprised how well the CTD will perform loaded w 30,000 lbs.
4). The last series of these tests with Ford having an advantage over Cummins, it was a stalemate. I think Ford had one less brake application and Ram best Ford up the hill by 2 seconds. Both within the margin of error.
5). We will see if the first truck to 1000 ft-lbs of torque can stay up w the Ford. But really really folks does, what was it ? 1 or 1.5 minutes difference up a hill between a Ford and GMC?, something you might do three or four times in your life, constitute a purchasing decision?
6). I like Cummins for sure. Using them in the power generation business, they are super easy to dial in to the torque curves we need to start different types of generation.
7), Cummins will always have an easier time competing w Ford or GM for King of the hill because that’s all they do and their platform is extremely flexible and really proven in the OTR market.
8.) Similarly I think GM might eventually beat Ford and Ram out in the three liter category because of the GM using the straight 6. We’ll see.
Peace Huntindog wrote:
For the first time, I have seen, the Ford performed the way one would expect according to it's ratings..... BUT.... It was cold and wet.
It did perform very close to where you would expect when you factor in that it gives up about 13 hp for every 100 rpm it runs below its rated 2800. So by running in the 2100 to 2500 rpm range instead of 24 to 2800 it gave up about 40 ponies.- I think in hot weather, it will be a different test.
For the first time, I have seen, the Ford performed the way one would expect according to it's ratings..... BUT.... It was cold and wet.
So what I always felt was the reason for Fords previous lackluster performances was less/no factor::: Defueling to protect the motor.
With all of the cooling enhancements GM introduced this year, I would expect it to do much better against the competition in hot conditions.
There are some other factors that may be in play as well. I just don't have enough info at this point to make a good call on them. - After watching the video I'm a surprised that the GM didn't stick closer to the Ford's time because the GM ran between 25 and 28 hundred rpm all the way up where as the Ford was running in the 21 to 25 hundred rpm range. When the Ford would loose a gear the engine would rev to 2500 rpm which should have given enough of a power boost to allow the truck to accelerate a bit, yet it never did. With the Powerstroke running as low in its rpm range as it did, it maybe left room on the table for the Cummins to compete. I think the Chevy under performed.
FishOnOne wrote:
One thing I liked about both trucks is they both come with Michelin tires from the factory.
Well they make for decent trade fodder for those that don't leave asphalt and don't drive on ice, or snow or gravel roads.FishOnOne wrote:
One thing I liked about both trucks is they both come with Michelin tires from the factory.
Me too. I'm still sour about the Generals that came on my truck from the factory. But the CP3 pump makes up for it! :B
Something tells me that there will be a power bump for the Duramax very soon....- One thing I liked about both trucks is they both come with Michelin tires from the factory.
Cummins12V98 wrote:
ShinerBock wrote:
This website will help you find the grade of that road. It is made for cycling, but you can select to follow the road. You will have to select start and the click the where you want to start on the road and then click again where you want to end. Then select show elevation and gradient to see those.
If this is the road then Cummins is right. It even gets steeper than 14% in some areas.
Mapometer
This was in 2016 after going to DRV and MORryde. I remember a lot of it being very steep! I was honestly thinking I may have to up shift when at 3,200rpm in second. But it held there. It was exciting to be honest!
Years ago I came down a long stretch of 8% grade highway with my Duramax, 5 speed transmission and no exhaust brake. I left it locked in 1st gear where it revved to 5200 rpm the whole way down. I started out in drive but the transmission would auto shift up to second and the truck would take off.
