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 > Your search for posts made by '4x4ord' found 499 matches.

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RE: F350 Super Duty vs 3500 Denali vs The Ike Pulling 30k lbs

The interesting thing about the Cummins vs Duramax is that the Duramax makes 445 Hp @ 2800 rpm vs the 400 hp of the Cummins. But as the Duramax pulls down it dramatically looses power. In fact if it were allowed to pull down all the way to 1600 rpm where it makes peak torque it would loose 167 hp. The Cummins on the other hand looses very little hp as the engine slows down. In fact the Cummins only looses 57 hp slowing from 2800 rpm down to 1800 rpm where it makes its peak torque. For this reason the Cummins doesn't need a 10 speed to compete with the Duramax. The Cummins will be putting out more power than the Duramax at rpms below 2250. Above 2250 the higher power of the Duramax starts to come into play. The Ram's ability to produce power at a lower rpm might allow it to get a little better fuel economy under certain conditions. Well once again I think it has more to do with torque than hp, the Cummins has a 45 hp DISADVANTAGE to the Duramax, BUT a 90 lb ft torque ADVANTAGE to the Duramax. Ford did dominate the uphill run. The difference in time indicates a 46 horsepower advantage that the Ford has which is a little more than the difference in advertised power ratings. Well while the Ford does have a 46 hp advantage, it also has a 140 Lb Ft torque advantage. Towing heavy is more about torque than HP! You are right. The peak torque defines the power level at the lower end of the power band. The peak HP defines the power level at the upper end of the power band. With a 10 speed transmission the Duramax will do much better because it can run closer to the rpm where it makes peak HP. A higher torque and lower HP engine such as the Cummins is not as concerned about its rpm. If you were to compare the power or torque curves of the Cummins and Duramax you would find that below about 2250 rpm the Cummins makes more hp where as above about 2250 rpm the Duramax makes more power. And, so, at about 2250 rpm the two engines make identical HP. Edit: Just to state it another way you can talk HP or torque it makes no difference. In other words, above 2250 rpm the Duramax makes more torque than the Cummins and below about 2250 rpm the Cummins makes more torque than the Duramax does.
4x4ord 01/25/20 09:41pm Tow Vehicles
RE: F350 Super Duty vs 3500 Denali vs The Ike Pulling 30k lbs

The way the Ford exhaust brake works on auto is that it tries to hold the vehicle to the speed at which it was going at the time that either the brake or throttle was last released. So if the driver applies the brake pedal to slow to 35 mph and takes his foot off the brake, the exhaust brake will try to maintain 35 mph. If he then steps on the throttle to accelerate to 45 mph and releases the throttle, the exhaust brake will try to maintain 45 mph. In the video the driver could have avoided making additional brake applications and as the truck continued to gain speed it would have triggered an automatic brake application to bring the unit back to 35 mph. The braking is so smooth it is hard to feel where the braking is coming from. During this test the Ford may have done some auto brake applications that Andre and Mr Truck where unaware of. The tell tale sign of automatic brake applications are: 1. the trailer brake controller displays the level of electric trailer braking on the dash, 2. the truck and trailer brake lamps illuminate.
4x4ord 01/25/20 09:15pm Tow Vehicles
RE: F350 Super Duty vs 3500 Denali vs The Ike Pulling 30k lbs

In those conditions, it would be difficult to do a comparison, unless they were run side by side.. Another thing stuck out for me. They said that their new standard was a perfect run is now 10 minutes... IIRC, it used to be 8 minutes. Either the climb has gotten longer, or the speed limit for the test has decreased. Or was this a one time reduction due to the weather conditions? They don't say. As for the concerns about the temps.... Not an issue in these conditions. Run them up in the summer and it will likely be a different story I would like to see the tranny ratios for each 10 speed tranny as well. I think it makes sense to increase perfect score to 10 minutes when towing the loads that the dualies are now capable of towing. link to a thread giving the Ford gear ratios. With 10 speeds to choose from exact ratios aren't going to make much difference.
4x4ord 01/25/20 06:07pm Tow Vehicles
RE: F350 Super Duty vs 3500 Denali vs The Ike Pulling 30k lbs

Will be nice to see how the measly 400/1000 with 4.10's RAM does with it's ancient outdated 6 speed AISIN. Very easy to have ZERO brake applications if one chooses running cruise control. The new Ram has already run up against the Duramax 10 speed towing 16000 lbs. The Ram and GM had identical times of 8:24. clickm Not towing 30k. The interesting thing about the Cummins vs Duramax is that the Duramax makes 445 Hp @ 2800 rpm vs the 400 hp of the Cummins. But as the Duramax pulls down it dramatically looses power. In fact if it were allowed to pull down all the way to 1600 rpm where it makes peak torque it would loose 167 hp. The Cummins on the other hand looses very little hp as the engine slows down. In fact the Cummins only looses 57 hp slowing from 2800 rpm down to 1800 rpm where it makes its peak torque. For this reason the Cummins doesn't need a 10 speed to compete with the Duramax. The Cummins will be putting out more power than the Duramax at rpms below 2250. Above 2250 the higher power of the Duramax starts to come into play. The Ram's ability to produce power at a lower rpm might allow it to get a little better fuel economy under certain conditions.
4x4ord 01/25/20 05:51pm Tow Vehicles
RE: F350 Super Duty vs 3500 Denali vs The Ike Pulling 30k lbs

Will be nice to see how the measly 400/1000 with 4.10's RAM does with it's ancient outdated 6 speed AISIN. Very easy to have ZERO brake applications if one chooses running cruise control. The new Ram has already run up against the Duramax 10 speed towing 16000 lbs. The Ram and GM had identical times of 8:24. clickm Not towing 30k. Right. So it will be interesting to see how it handles 30k ... should be similar to the Duramax maybe a little slower.
4x4ord 01/25/20 04:37pm Tow Vehicles
RE: F350 Super Duty vs 3500 Denali vs The Ike Pulling 30k lbs

I wish they would have posted more information like they did in the past. Like the DB reading going up the hill. There was very little video of either run up the hill. They should discuss how many times the fan clutches engage. The temps up the hill. All relevant information. That being said, the Ford did a great job pulling. I also want to see a more relevant test, 15k RV up the hill and see how each performs. You might find these videos of some interest: F450 with 30k lbs F350 SRW towing a 13k Grand Design
4x4ord 01/25/20 04:20pm Tow Vehicles
RE: F350 Super Duty vs 3500 Denali vs The Ike Pulling 30k lbs

This test seemed a lot more haphazard than what they have done in the past, particularily on the down hill portion. There is no question the Ford dominated the run up the hill. Looks like in this case the Ford actually performed like you would expect given its power advantage. GM clearly is going to have to find some more power to compete with the Ford 6.7 on this test. The driver's commments on the clutches on the CAT made me laugh. He clearly has no idea what he is talking about. Ford did dominate the uphill run. The difference in time indicates a 46 horsepower advantage that the Ford has which is a little more than the difference in advertised power ratings.
4x4ord 01/25/20 11:28am Tow Vehicles
RE: F350 Super Duty vs 3500 Denali vs The Ike Pulling 30k lbs

According to my math the Powerstroke's average crankshaft power output over the entire run would have been very close to 425 hp (assuming a 15% powertrain loss). Based on a torque curve with max torque of 1050 lb ft @1600 rpm and a peak horsepower of 475 @ 2800 rpm I expect the Powerstroke to make 425 HP at about 2400 rpm. So .... based on the math, it looks as though the Powerstroke wasn't holding anything back .... it put full fuel delivery out for the entire run up the hill. Edit: I'm not sure where my mistake was but, 375 flywheel HP is more like what the Ford would have been generating .... not 425. The Duramax averaged more like 329 flywheel HP. (This assumes 15% driveline loss for both trucks and 75 hp to overcome air and rolling resistance for the Ford vs 67 HP for the GM.)
4x4ord 01/25/20 10:39am Tow Vehicles
RE: F350 Super Duty vs 3500 Denali vs The Ike Pulling 30k lbs

Will be nice to see how the measly 400/1000 with 4.10's RAM does with it's ancient outdated 6 speed AISIN. Very easy to have ZERO brake applications if one chooses running cruise control. The new Ram has already run up against the Duramax 10 speed towing 16000 lbs. The Ram and GM had identical times of 8:24. click
4x4ord 01/25/20 10:20am Tow Vehicles
RE: 2020 Powerstroke 0-60 @ 5000' elevation

I just tried out my 2017 F350 and it takes 7.5 seconds 0-60 in 4wd. Based on that the 2020 is significantly more powerful.
4x4ord 01/24/20 09:41am Tow Vehicles
2020 Powerstroke 0-60 @ 5000' elevation

TFL test the Super Duty against the Ranger
4x4ord 01/23/20 11:32am Tow Vehicles
RE: GM wants to improve trailer brakes

"trailer manufacturers would need to get on board." Hahahahahaha It appears that GM wants trailers to be equipped with disc brakes. Like that's ever going to happen. We can't even get self-adjusting drum brakes on our trailers let alone disc brakes. I'll bet GM still makes vehicles with rear drum brakes.Nothing wrong with drum brakes in the right application. Seen many semi's with disc brakes? Properly working electric drum brakes are excellent .... however, they often don't work properly. On the other hand, my experience with electric disc brakes is that they always work properly.
4x4ord 01/22/20 06:21pm Towing
RE: Cruise testing, I would be uncomfortable

When the highway death toll drops to insignificant numbers, when tailgating and road rage are a thing of the past, when speeding doesn't exist, you will wish this happened sooner. Not a chance. Some prefer the experience of driving. Not just a means of getting to point B. I will never be the market for that technology. I would have said something quite similar to you prior to experiencing auto steer on farming equipment. Now I have a hard time having to manually steer the lawn mower.
4x4ord 01/22/20 09:11am Tow Vehicles
RE: Check Me....I am OK with this set-up

You are fine with those weights but even if you were to overload your truck by 1000 lbs or so it's not like the wheels would fall off. I certainly wouldn't recommend doing it but I've had 11,000 lbs of pin weight on the back of my SRW with no ill effect.
4x4ord 01/21/20 04:45am Tow Vehicles
RE: just saw my 1st 2020 F-350's

I have not paid a lot of attention to my transmission temperature but today at minus 2 degrees F I watched as a cruised down the highway with no load. After about 40 minutes of driving the engine temp got up to 203 degrees before it rapidly dropped to 190 degrees and started slowing climbing again. I think the truck must have a 200 degree thermostat. The transmission just slowly and steadily rose till it reached 190 degrees. My guess is that the engine coolant warms the transmission fluid.
4x4ord 01/18/20 07:03pm Tow Vehicles
RE: Auto slider or manual

I would never get a manual slider. I am happy with my B&W in my short box but if I was worried about hitting my back window I would go autoslide.
4x4ord 01/18/20 02:30pm Towing
RE: Would I ever be happy towing with a half ton truck

I pulled 8000 lbs in the 80's with a heavy half and a 3 speed transmission. I'm quite sure I could be totally satisfied with a new half to if all I was towing was 8500 lbs. GM, Ram, Ford doesn't matter, they can all handle that kind of weight. Just relax and enjoy the drive.
4x4ord 01/18/20 10:53am Tow Vehicles
RE: just saw my 1st 2020 F-350's

Trans fluid life is directly related to fluid temps. I would like to hear the driving type at that temp. Does transmission oil last longer at 160F than at 192? Amsoil used to have graph that showed tranny fluid life at different temps. I don't know that is that drastic going from 160 to 192 but I think the moral of the story is the hotter the fluid the less longer it lasts. I think you're right, however, if Ford has designed the transmission to run hotter they may also spec a synthetic transmission fluid to withstand the hotter temperature. I really don't know much about it. The fluid life of the 6r140 is 150,000 miles.
4x4ord 01/17/20 06:33pm Tow Vehicles
RE: just saw my 1st 2020 F-350's

Trans fluid life is directly related to fluid temps. I would like to hear the driving type at that temp. Does transmission oil last longer at 160F than at 192?
4x4ord 01/17/20 06:00pm Tow Vehicles
RE: just saw my 1st 2020 F-350's

The truck I drove, the transmission quickly came up to 192° But it stabilized there Seems on the high side. Was that in City driving? Depends how you look at it. Having it run at 192 degrees when it's not working could be a good idea. Hot thin oil could provide for better efficiency. The engine coolant might be heating the transmission oil up when the trucks not working.
4x4ord 01/17/20 04:39pm Tow Vehicles
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