Questions & Answers
We've
been getting a lot of questions lately
about urea required for the 2011 6.7L diesel.
Customers are wondering what it is and what the cost will
be.
2010 federal emissions standards call for a reduction of nitrogen oxide
levels by more than 80% compared with previous regulations. Ford is using the Diesel Exhaust Fluid (DEF)
Method to reduce these levels. Urea is a mixture of amonia &
water. Injection of DEF is a proven technolgy that's been
used throughout the industry. Unlike other solutions, the DEF system allows the engine to run
at it's optimum range in terms of fuel mixture - some sytems require the engine to run richer, which can be harmful
to diesel engines.
DEF is replenished approximitely every 7,500 miles depending on customer use. The tank holds
5 gallons. We recommend topping off at each oil change (5,000 miles or 200 engine
hours) The message center will alert you when the DEF needs to be replenished. The
first alert on the message center lets you know when the tank is about half full. The next alert comes on with
about 800 miles worth of DEF remaining & the next with approximately 100 miles. Cost will
be approximately $10 per gal. From what we can tell so far, it looks like it will use 3 gallons or so every 5,000
miles or 200 engine hours.
The final step of the cleansing system for the diesel exhaust gas involves the Diesel
Particulate Filter (DPF.) The DPF traps any remaining soot
which is then periodically burned away, known as regenerating. Another advantage of the
DEF is the reduction of regeneration cycles.
The
question.....
"I noticed in e-source that the chassis cab 6.7 engine shows 300 hp @2800 and 660 torque @1600...while it is 390 hp
and 735 on the pickups through the F450.
Is this correct? Is there any speed restriction on the Chassis cabs? What is it ....... And, if the answer is
yes...can I get an explanation?"
The answer......
Yes, it is correct - When Ford certifies with the EPA they do so in two different ways, one is
called a chassis cert, (for pickups) and the other is a dyno cert, (for chassis cabs). The chassis cert is used on
the pickups - not to get technical but the simple explanation is for a pickup the chassis configuration is a
constant, that is to say we know that every one off the line has a pick up box on the back and that allows
engineering to go to the max if you will with the emissions, they are working with a fixed frontal area, height,
size, weight ect... while on the dyno cert which is used on the chassis cabs, engineering has no idea what the back
end of any given vehicle is, so in turn the engine is certified to allow for the worst case application and still
meet the emissions.
Now as to the max speed rating for either vehicle pickup or chassis cab, the single factor that
determines the max vehicle speed is the tire. In the case of a F-550 the tires are speed rated by the tire
manufactures to a maximum of 75mph, so Ford electronically caps the max vehicle speed at 75. So you can blame it on
the tire manufacturer.....
Ford had received complaints from customers (mostly on F-450 pickups) because the "dang truck wont
go over 75mph" so you will notice this year that the F-450 pickup has smaller tires that do a couple of things, one
they reduce the total payload capacity, but to the customer more importantly the tires have a higher speed rating
that I believe takes the max vehicle speed up to 85mph.
Todd Kaufman
FUN WITH TRUCKS!
F-Super Duty Chassis Cab Marketing Manager
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