6.6 (403 CID) Duramax with Allison Auto- 310HP 590 Torque / With 6 Speed
Man. 300HP 520 Torque
Fuel economy. Beats me since it depends almost entirely on how you drive
The EPA ratings system is a joke anyway.
They have not actually tested ANY auto to get the ratings. They test a
prototype engine before it is installed in a vehicle and then measure
the emissions out the tailpipe to get the economy rating. The different
ratings for the different vehicles are strictly based on the weight of
the vehicle at time of delivery. Not any other testing. So if you take a
1500 Chevy and equipped it with the same engine as a 2500 Chevy the 2500
will be rated lower if it weighs more. BUT in the case of quite a few
engines this isn't true.
Take a look at the old 350, In ANY vehicle equipped with one the mileage
seems to be between 14 and 19 MPG. doesn't matter what the base vehicle
weighs. But if you start towing kiss the mileage goodbye...
"Randy Farnsworth" < email@example.com> wrote in message
Here's what I get on my DMax. It has less than 4000 miles on it so I would
hope it would get better as it gets more miles on it.
Stop and go around town - 14 mpg
Back and forth to work - 6 miles, few stops, and mostly at 45 - 55 mph - 16
75 - 80 mph on freeway - 18 mpg
60 - 70 mph highway - 21 mpg
I'm very happy with it thus far!
All kidding aside, the cummins engines I have driven were really poor
on low end torque. They wouldn't go till you got over 2500 rpm's.
The duramax will give almost all of it's torque at 1800 rpm's. It
really feels like a hotrod off the line.
Duramax. Haven't driven one yet. Competition is great for the
consumer. After the duramax waxed the ford and dodge, they both came
out with stronger quieter engines. Then chevy stepped up their engine
a notch for 04. Maybe in 10 years we will have engines that develop
over 1000 ft lbs. of torque.
rpm's to get at that power. The diesel has the power RIGHT NOW. I
can imagine that giant sucking sound you would hear when you step down
on that big block.
Any first hand experience driving and towing with the 8.something
develop the power. You just give it the fuel and you have the power.
No waiting for the power to build. When you mash the pedal down, it
just keeps pushing you back in the seat with little or no change when
I decided to look around the web to see if any one could shed some light
on what I was saying. Searched for "gas vs diesel". It seems to be a
difference between HP and Torque. Gas gets it HP faster but the Diesel
has the torque.
Don't forget you're comparing a forced induction diesel to a naturally
aspirated gas engine. forced induction by itself can make for huge
boosts in low end torque. just imagine the power of a turbocharged
6.0 gas engine (to keep it comparable to the 6.6l Duramax)... the
thought of a 8.1 with a turbo.... it just makes me feel all fuzzy
Thanks for the info. I looked around Chevy's site (and Dodge's) and
couldn't find much info on the duramax. I knew they didn't post mpg,
though - the car lobby in congress is too strong. Thanks
Author of "A Stand Yet Taken"
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