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 > Your search for posts made by '4x4ord' found 459 matches.

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  Subject Author Date Posted Forum
RE: 2017 F-350 DRW 0-60 testing

The typical diesel engine in a pickup is only around 35% efficient. I'm thinking there's all sorts of room for improvement. For instance nothing is presently being done to harness the heat energy in the cooling system. Think of all the energy lost going down hill and braking. More can be done to reduce areodynamic drag on the fifth wheel RV. Not sure where you are getting that figure. 25 years ago when I did my mechanical engineering undergrad, diesels where in the low 40's....about where they are today. Yes, you can get them into the low 50's, but is usually in lower rpm engines, ships being an example. 30-35% is gasoline engine territory. To extract meaningful work out of two temperature delta's you need them to be as far apart as possible. 200 degree air opposed to 70 degree ambient isn't enough to fool with for energy extraction. Regenerative braking is cool, but now you are carrying around a few hundred pounds in batteries everywhere you go and those, and the corresponding technology, adds cost to your vehicle. Those additional costs can buy a lot of diesel fuel to offset the marginal 5-10% gain you might achieve. As I said above, it's all about compromises. If there was a breakthrough or disruptive technology, I think we would have already seen it by now. Adam I don't know the exact level of efficiency that a diesel engine might run at while pulling an RV down the road at 60mph. I'm sure it is not in the low 40's. 35% is likely too high. I could see a diesel truck engine running 40% efficient when working hard at a low rpm
4x4ord 02/19/17 08:50pm Tow Vehicles
RE: 2017 F-350 DRW 0-60 testing

I saw that article too, but let's get realistic. They are spending $40M on that truck and the gains they are showing are impressive, but two things are blatantly missing from any article I could find on it. 1. the actual weight they are using when achieving those MPG and 2. the speed at which they are driving. I found 1 article showing the truck had a weight of 65,000 lbs, but they have may have been the "max" weight due to lightened frame they were using. Regardless, it's not clear and I've been in gov't R&D programs long enough to see many creative stories woven to tell the story you want the audience see and hear. Also, you have 3 big manufacturers that are vying for your dollars. If GM, Ford and Fiat/Chrysler/Ram could find a huge breakthrough in fuel efficiency, they would have done it by now. The reality is that physics is hard, no impossible, to overcome. Like the 52 mpg CAFE standard Obummer mandated, it's totally and entirely unrealistic unless you like the idea of driving around in a small tin can that cannot carry my family of 5 AND two sacks of groceries. Case in point, I now live in Belgium and drive a 1.7L Ford S-max diesel. On a freeway trip at 75 mph, the best I can do is 42 mpg. It's sleek, small, cramped and I pray I've never in an accident with it, but that's my bomb around transportation until we return back to the states. Given the choice between an F-350 and this S-max, never in a million years would I buy the small car. My families safety, convenience, comfort, not to mention the overall usefulness of the F-350 for a multitude of tasks, makes the choice a no-brainer. The F-350 is easily twice the frontal area and probably 3 times the weight and gets about half the mileage of the small car. No surprise there. If you want better mileage in a full sized truck, then go get an eco diesel or the upcoming F-150. I'm sure it will be a nice truck, but it's not going to safely tow 20,000 lbs and you'll be disappointed pulling mountain passes with a large trailer in tow. Life is a series of compromises, but I don't think we'll be seeing a 25 mpg Superduty that has the same capabilities as today's truck any time soon. Unless of course you lower it, take out the 4wd, make it look like an F-15 drop tank, add a third overdrive gear, and put some really useless high efficiency tires on it. Perhaps then you'll break the mid-20's, but then you are back to the "compromises" thing again. Adam The typical diesel engine in a pickup is only around 35% efficient. I'm thinking there's all sorts of room for improvement. For instance nothing is presently being done to harness the heat energy in the cooling system. Think of all the energy lost going down hill and braking. More can be done to reduce areodynamic drag on the fifth wheel RV.
4x4ord 02/19/17 06:23am Tow Vehicles
RE: Overloading a pickup from time to time - a tradition?

http://www.blog.solarhaven.org/BurroCart2ADJ.jpg height=400
4x4ord 02/18/17 10:54am Tow Vehicles
RE: 2017 F-350 DRW 0-60 testing

0-60 doesn't mean a whole lot to me. My 03 Duramax is tuned and does 0-60 in 7 seconds. It is not even in the same league as the new trucks as far as towing goes. Racing flat out up an eight mile long hill is a little better measure of a trucks towing ability but just because truck A is faster up one hill than truck b it doesn't mean it will be faster up the next hill. As well if my Ford goes up a hill at 55 mph and 2200 rpm and a GMC will go up the same hill in 3rd gear at 57 mph and 2950 rpm I might very well enjoy my towing experience more in the slower Ford.
4x4ord 02/18/17 04:05am Tow Vehicles
RE: How heavy is TOO heavy? GVWR on a 2500

I towed an 11000 lb RV with an 03 tuned Duramax and felt it handled it fine. Then I I towed the RV in my signature with the same 2003 Duramax. My GCVWR would have been very similar to yours. The truck had enough power. I was not concerned about being a little over the RAWR. I felt the truck was maxed out. The EGT reached 1400 on steep hills. On long down grades I would shift to low gear and the trailer would push the engine rpm up over 5000 rpm. I had over heating issues on long steep hills on hot days. I ended up burning out the transmission. I upgraded my truck to a 2011 F350 SRW which isn't rated to tow any more than the GMC was. The difference in capability astounded me. The new truck handled the trailer absolutely fine. I would say the limits of your truck are slightly exceeded and that the Allison is not up to the task of handling your trailer or a tuner on mountain grades.
4x4ord 02/18/17 02:32am Tow Vehicles
RE: 2017 F-350 DRW 0-60 testing

If an 85000 lb Freightliner can get 13 mpg there certainly is room for a piddly little 1 ton to do better than 10 mpg pulling an 18000 lb RV.
4x4ord 02/17/17 11:36pm Tow Vehicles
RE: TFLTruck tests 2017 Chevy 3500

With a little modification the outgoing Duramax and Allison combination where tuned to deliver up to 750 HP in one of these units: click
4x4ord 02/17/17 12:12pm Tow Vehicles
RE: Overloading a pickup from time to time - a tradition?

We never overload our trucks. Just load what fits. http://i1117.photobucket.com/albums/k585/4x4ord/Mobile%20Uploads/IMG_20141123_140214_zpsc4a4df87.jpg height=600 http://i1117.photobucket.com/albums/k585/4x4ord/2012-03-28155731.jpg height=600 http://i1117.photobucket.com/albums/k585/4x4ord/IMG_0250-3.jpg height=600
4x4ord 02/17/17 09:45am Tow Vehicles
RE: Looking at a 2014 Ram 3500 Need Opinions

That truck might have a lot of good miles in yet but it is about miled out as far as depreciation goes. If you put 15k per year on it, it will be about worthless as far as resale in 7 years. If you could buy it for 21k, use it for 7 years and sell it for $3500 with 300k miles on it your annual depreciation word be $2500. I purchased my 2011 KR new in 2011 for 55k and sold it with 100k miles for $40,000 in 2016 ( unique situation)....$3000 per year depreciation. I think anytime you can figure on under $3000 per year for depreciation you're doing well.
4x4ord 02/17/17 05:59am Tow Vehicles
RE: Looking at a 2014 Ram 3500 Need Opinions

That truck might have a lot of good miles in yet but it is about miled out as far as depreciation goes. If you put 15k per year on it, it will be about worthless as far as resale in 7 years. If you could buy it for 21k, use it for 7 years and sell it for $3500 with 300k miles on it your annual depreciation word be $2500. I purchased my 2011 KR new in 2011 for 55k and sold it with 100k miles for $40,000 in 2016....$3000 per year depreciation. I think anytime you can figure on under $3000 per year for depreciation you're doing well.
4x4ord 02/17/17 05:57am Tow Vehicles
13 mpg semi

link
4x4ord 02/16/17 10:57pm Tow Vehicles
RE: Our first TV, we've come a long way..

I haven't come nearly so far: http://i1117.photobucket.com/albums/k585/4x4ord/IMG_0228-1.jpg height=600 http://i1117.photobucket.com/albums/k585/4x4ord/IMG_20160315_174052008_zpsklrgvfoy.jpg height=600
4x4ord 02/16/17 01:49pm Tow Vehicles
RE: TFLTruck tests 2017 Chevy 3500

Man that trailer would look nice behind a black King Ranch dually.
4x4ord 02/16/17 06:13am Tow Vehicles
RE: Survey - who has had a citation for RV overweight?

British Columbia, Canada is the only jurisdiction that I am aware of that has a law in place concerning weights of RV's. Their law indicates that an RV or tow vehicle with a GVWR under 5500 KGs cannot be loaded over that maximum gross vehicle weight rating. In practice it is very unlikely that a 2500 Duramax towing a fifth wheel would ever run into trouble but if a car or truck is towing something with its headlights pointing to moon and a LEO sees him he can have the vehicle weighed and charge the driver accordingly. Fact sheet
4x4ord 02/15/17 10:03am Tow Vehicles
RE: Survey - who has had a citation for RV overweight?

Spring time. Another 'overweight question". Do you really think your rig or any rig is even close to approaching the max weight limits? Seriously? As nickthehunter pointed out max axle weights are usually 20,000 lbs for a single axle, 34,000 for a tandem axle and 80,000 gross (total) weight. When talking those 'big' numbers people's eyes glaze over and they don't have any concept of what they mean. Let's put it in perspective looking at a 5th wheel. Your truck weights 8000 or a bit less. You have a heavy 5th wheel that weighs 15,000 lbs loaded. Total weight then is 23,000 lbs. Now lets look at the semis running down the road. Look at one that has one of the 53 ft box trailers. The tractor unit is a long nose double sleeper, long wheelbase rig. Empty that combination will weigh about 23,000 lbs, maybe a bit less. Look at the those numbers again. That empty semi weighs the same as if you had a heavy pickup and a fully loaded 5er. When people truly understand weight laws then they would see just how silly these questions really are. They think because they have a 'big' camper that somehow they're in the big boy's league of hauling weight. Not even close. Think about it. Your truck and camper have tires which may be the same load handling capacity as what's on your car or maybe just a bit more. If your rig was over 20,000 axle (10,000 per tire) do you think your tires wouldn't give out long before you maxed 20,000? And yeah, I was the weight police. The real weight police. I didn't get my knowledge from listening to some fat guy sitting around the campfire. For 27 years I weighed a lot of trucks, taught truck weight laws, was recognized by the courts as an expert in truck weight laws, and commanded the highest fine generating scales in the state of IL. That empty semi you're talking about is a very light one. Our Kenworth weights 33,000 lbs empty without a trailer.
4x4ord 02/15/17 08:14am Tow Vehicles
RE: Breakdown of truck sales 2016

If I was paying for a truck that I didn't have to drive....I would consider a Ram. You should take mine for a test ride. It will surprise you. In all honesty I think the new diesel 1 tons are all incredible. I haven't even sat in a new Ford yet. By the time I am ready to replace my truck, in 3 or 4 years, Ram and GM will likely both be redesigned and I will be considering all three. I'm hoping for at least one of the three to make a big jump in fuel economy by then.
4x4ord 02/14/17 12:38pm Tow Vehicles
RE: Another 'New Used' Question

I don't have any experience towing with the new 1/2 tons but I towed a 7500 lb stock trailer with a heavy half years ago and it seemed to do alright. That was with a 1979 Chevy regular cab 2wd. I would think a new 1/2 ton would be more capable than a '05 3/4 ton.
4x4ord 02/14/17 12:04pm Tow Vehicles
RE: Breakdown of truck sales 2016

If I was paying for a truck that I didn't have to drive....I would consider a Ram.
4x4ord 02/14/17 11:15am Tow Vehicles
RE: How do you determine how much to spend on a truck?

I have a foolproof plan that has worked for me. I buy as much vehicle as the wife allows! :B It also works for me. So far, so good. This is funny, not the way it works in our home, but probably some very good advice. It reminds me of when one of my daughters was getting married. She absolutely had her heart set on an outside wedding. Her fiancee and I were making some final preparations to get ready for the big day, which was scheduled for the very next day, when I looked at the weather forecast and saw it had changed. They were forecasting a !00% chance of rain. I told my soon to be son in law of the forecast and then said to him, "well you are going to be the man of the house .... the decision is your's. Should we get on the phone and start calling people to move the party to the church (our back up plan) or take a chance that the forecast is wrong and carry on with the plan as is? ... The decision is yours. What do you want to do?" He said, "I think I want to phone your daughter."
4x4ord 02/13/17 07:24pm Tow Vehicles
RE: TFLTruck tests 2017 Chevy 3500

I get the idea they are going to test all three trucks again. Both the Ford and GM should have just enough power to tow 23000 lbs up the hill at the 60 mph speed limit. With 3.73 gears the Ford would be running about 2600 rpm in 4th gear at 60 mph. The Chevy would only be turning about 2275 so maybe the Ford will have the advantage. If it ends up that both trucks drop to third gear the advantage will be in GM's favor..... If the Ford can't manage 60 mph it might have to drop to third and rev to 3000 rpm where it's only able to do about 52 mph. If the Chevy drops to 3rd and revs to 3000 rpm it will be making 57 mph. I'm going to guess 8 minutes 40 seconds for the winner. 2017 Ford F-350 diesel dually doesn't come with a 3.73 gear. Nice. I like the idea of a 3.55 in the new dually. I don't actually know how but I totally screwed those numbers up. The Powerstroke with 3.55 gears will turn 2616 rpm in 4th gear at 60 mph and the Duramax shouldl be running 2365 rpm in 4th gear at 60 mph. So the Ford might make a little more HP at the speed limit. If the trucks drop down to 3rd gear and rev toward the red line the Duramax will travel about 56 mph @ 3100 rpm and the Ford at 3100 rpm would be going about 54 mph. (assuming they can rev to 3100 rpm... I don't know how fast the power drops off over 2800 rpm.) It really should be close.
4x4ord 02/12/17 04:15pm Tow Vehicles
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