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Old 10-17-2010, 06:53 PM   #15
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Originally Posted by 2airishuman View Post
DEF is used to convert oxides of nitrogen (NOx) from the exhaust into nitrogen and water vapor.

it's got nothing 2 do with BLACK (soot) in the exhaust.

the DPF traps/screens the diesel particulate (soot) matter like a vacuum cleaner bag...

and then periodically REgenerates (cleans) itself by converting the soot to ash using HIGH TEMPs.

once cleaned it continues trapping soot and the process repeats.
________

the 08-10s have totally clean looking exhaust (no SOOT) pipes...

but the NOx is colorless and odor less

and harmful to living things in a DIFFERENT way than soot.

that's why the NOx removal was added for the new emission standards on 2011s.

there are multiple ways to accomplish this and DEF is the cheapest for the manufacturer.
_________

the dodge/cummins has the DPF but no DEF (no urea fluid/canister)

it uses a precious metal cat/converter to trap/convert NOx without fluids.

that's a more expensive technology for removing N0x

but is simpler for the owners and LESS $ for periodic maintenance.
_________

for the op...

18s vs 20s is not exactly an independent OPTION u can choose.

the tire/wheel size is tied to GEARING and PAYLOAD and GVWR.

so IF buying off the lot u will see certain common options/packages and gearing with 18s vs 20s.

17s are also available my truck has 17s.

imo 17s or 18s are a better tire/wheel choice for many reasons,

but most folks think 20s look better.

but ultimately what is available will depend on gearing/payload packages.

i could explain the many combinations but it would take pages.

the sales guy can enter options/packages and the COMPUTER will only allow specific comboz.

cheers
2air'

2air, What year do you own?

Just curious?

Shane
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Old 10-17-2010, 06:57 PM   #16
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Dennis,

The 18" tire has a diameter of 32.1 in. and a sidewall of 7.0 in. The 20" tire has a diameter of 34.1 in. and a sidewall of 7.0 in. Can you explain why you said the 20" wheels will give you a stiff ride because there is almost no sidewall. It looks like the sidewalls are the same.

Barry
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Old 10-17-2010, 06:59 PM   #17
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I think he was referring to aftermarket rims,,,as was I.

Shane
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Old 10-17-2010, 07:06 PM   #18
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Definitely 18s and a long bed and a crewcab if available. Now the crewcab will be more but if you get it you will thank me and yourself later on. I have never regretted getting the crewcab, we not have a big dog and he takes up most of the backseat.
I think you have chosen an Awesome TV.and for only a few bucks more ya can go in style. Dont worry about the long bed being longer wheelbase(better ride too) and ya have to take up two parking spots at WalMart, I do it all the time and you just park a little farther from the store and the exercise will be good fer ya.
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Old 10-17-2010, 08:15 PM   #19
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I'd vote 17 or 18 inch tires. Drive Axle[s] Limited Slip (or locker) is mandatory. Longbed with HD cover (either bed topper or tonneau type). I find no need for 4WD (initial cost, maintenance, repairs) so I'd recommend plenty of contemplation on that option (as proper E-range tires and some bed weight cover most contingencies).

Good luck

.
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Old 10-17-2010, 09:17 PM   #20
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Your need for 4wd will depend entirely on where you like to go... on our first trip w/ the Airstream, we used 4wd extensively. If you like to go boondocking in anything other than perfect conditions, 4wd will give you great piece of mind - and possibly avoid rather awkward problems.

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Old 10-17-2010, 10:40 PM   #21
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Thanks for the great inputs. We'll get the 4WD for our firewood cutting trips through the woods (we heat our house with wood, so we get lots of firewood).
18" wheels, crewcab (also have a big dog), leaning toward the shorter bed.

Nobody seems too concerned about the DEF or the exhaust temps while cleaning the exhaust filter--non-issue, or maybe not much experience out there with it?
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Old 10-17-2010, 11:11 PM   #22
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dpf is on all the new D trucks, can't be escaped.

DEF is on all but the dodge and also on vw, merc, bmw and so on.

so it's not u can OPT to buy new without these things.

and there is more emissions stuff coming in 2 years.

cheers
2air'
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Old 10-18-2010, 12:27 PM   #23
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First thing I'd do is change it to a 350...and a LB...and yes; 17" wheels.

Tow pkg (of course) brake control, in bed 7 pin plug, deezul, largest fuel tank, sunroof (cause I like em'), winter package, auto trans, locking diffs, whatever bling you like/need, 4 doors, training wheels on the back, 4wd...er 6wd ,...might even get that girlie step ford sells...let DW pick the color...you'll be all set!
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Old 10-18-2010, 12:37 PM   #24
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My tow vehicle is a 2007 F250 4X4 Crew Cab Short Bed with 17" wheels. I get anywhere between 11 and 15 mpg depending on speed, wind an terrain. Also have a SnugTop tall shell on back which keeps stuff dry and keeps all but the most persistent
thieves away. If I take my Yamaha 2400iS generator, I make sure it is chained and covered in the bed just be be sure it does not walk away. If they cannot see it, they are less likely to break in.

Dennis
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Old 10-18-2010, 12:43 PM   #25
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Black Nasty Smoke?

Quote:
Originally Posted by THEPILL View Post
You can get it at Flying j for about 6 dollars a gallon. Ford sells it for roughly 12.99 a gallon here. Prices vary everywhere. I also heard most auto part stores carry it. I also heard that in a few places there are "def" pumps. I haven't seen one here in Texas. I think it's a minor annoyance. It beats the black nasty smoke my 7.3 and even my 6.0 produced.

Shane
Not sure why you have black nasty smoke on your 6.0 unless you have a dirty fuel filter. My 6.0 does not smoke when towing unless I put my foot all the way to the floor and even then it is barely visible.

Dennis
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Old 10-18-2010, 04:33 PM   #26
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Not sure why you have black nasty smoke on your 6.0 unless you have a dirty fuel filter. My 6.0 does not smoke when towing unless I put my foot all the way to the floor and even then it is barely visible.

Dennis
It would be "had"...traded on a 6.7.

I had it chipped.

Even before and after the chip.. when starting in the garage it would throw black exhaust on the shelves close to the pipe.

Or racing a Mustang, or something....

Shane
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Old 10-18-2010, 08:08 PM   #27
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I'd vote 17 or 18 inch tires. Drive Axle[s] Limited Slip (or locker) is mandatory. Longbed with HD cover (either bed topper or tonneau type). I find no need for 4WD (initial cost, maintenance, repairs) so I'd recommend plenty of contemplation on that option (as proper E-range tires and some bed weight cover most contingencies).

Good luck

.
Unless Ford has changed the limited slip from mechanical to electronic. Avoid the Limited slip. It's worthless. I installed a ARB air locker.
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Old 10-19-2010, 07:36 AM   #28
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I find no need for 4WD (initial cost, maintenance, repairs) so I'd recommend plenty of contemplation on that option.
I am curious; Every once in a while I hear someone mention the maintenance, repairs” associated with 4wd….I have driven 4wd vehicles since 1971, everything from CJ5’s to Suburban’s, use the 4wd enough to justify it (skiing, New England winters, occasional logging roads in Maine/NH) and have never once had a 4wd failure. Yes there is some initial expense (less than a tow out in the backcountry!) and gear lube should be topped off occasionally (50k miles), you may lose ~ 1mpg, but I have never, not once, had to spend any significant amount of time or money repairing or maintaining 4wd.

My experience has been quite the opposite; I can’t imagine owning a truck that is not 4wd.

Can you explain your cost and maintenance experience with 4wd?

I am wondering if I have missed something all these years…

Tx, Bill
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