for those of you who owned or drove a 6.7 and a 5.9.
is the 6.7 that much better? i kno its the cleanest diesel. i heard it was insane in the power department. i drove a 5.9 but never a 6.7

 

I got the chance to do this today. My Mom has an 07 5.9 and I have an 08 6.7

The things I noticed today
1. the new truck has more power. Seems like it has more seat of the pants feel.
2. It sounds WAY BETTER! 6.7 has a deeper growl to it much less pingy
3. The 6spd auto is amazing!! This trans rivals my Father in laws Allison!
4. The fuel milage is worse with the 6.7 My overhead reads driving around town13.5 and my Moms is reading 15.9. Same around town type driving.

Do I wish I had a 5.9??? Nope! I love my new truck. the only down side right now is the milage and not too much worse

Chris

 

amazing torque and pulling power down low, but at the expense of a narrow powerband. past 2500RPM it falls on its face. better for heavy towing than racing.

 

the new truck is better in everyway except the restricting exhaust and all assosiated crap with the new emissions. as far as racing goes, the best i got out of the 04 with the mods listed was 15.6 @ 87mph in the 1/4, i took the new one to the track before any mods with only 1200km on the odo to get a baseline, 15.0 @ 91mph. i have not had a chance to try it out with the intake and edge yet as the track is covered in snow now, but i can't wait until spring and see what this does. i can't compare millage #'s yet because the 04 is well broken in and the new one is not but the new one started out about the same, 14 in town and 18 or so on the highway.

 

Turn the **** clockwise to "4HI" .

 

So how does the 6.7 handle a lot of idleing? And just normal ol city driving, stop and go, short distance?

I live in AK and in the winter it can get really cold-10 to -30, there is a lot of idle time in the winter.

 

The 6.7 is not for town driving nor a lot of idling because of all of the EPA junk that is on it. I was informed yesterday the limit on idle time should be no more then 10 minutes max and those who do a lot of town driving are having the most problems.

 

So basically, after almost 30 years Dodge has regressed to the standards of the early GM diesel OTR only. Perhaps they should put a sticker. somewhere, telling the cunsumer that. JMHO

 

I was told not to idle more then a hour. I've let mine idle as long as 20 min. on more then a few ocassions & have never had a problem. I do a lot of city driving as well. I would say that roughly 70% of my 8000 miles are city & the truck has regen'd once.
A friend of mine works at Jeep Truck Engineering & spoke to the Cummins factory rep. He said for city driving in an auto use tow/haul & the exhaust brake & drive it like a teenager & that will keep it from loading up.

 

If you have the high idle feature enabled then you can let it idle but I wouldnt do it for more than 1 hour at a time. Also you make sure that you have the most current ECM updates from your dealer, this will also help with soot accumulation. Also after it idles for extended periods of time and anytime you are driving in the city give it hell. The more "LOAD" you put on the engine the better off it is. Also ALWAYS run with your exhaust brake turned ON. Unlike some popular belief this DOES NOT HURT YOUR MILEAGE. It helps keep your exhaust temps up to keep the particulate filter as cleaned out as possible, it also helps you save your brake pads a little. Running the brake also helps keep your turbo running properly, the way that the variable geometry turbo works out it has a cleaning ring to keep the soot from building up on the sleeve that changes the flow to create the "variable geometry" . If the sleeve get excessive soot build up on it the the turbo will quit functioning properly and it WILL NEED REPLACING. I have had several trucks come into the dealership with this problem and i have to replace the turbos which IS NOT FUN. Hope this info helps yall out. Any other questions feel free to PM me.

 

Basically Dodge/Cummins is still ahead of Ford and GM

 

If you're in the country and not idleing excessively is this really necessary?
Are there any actual numbers on Fuel consumption by doing this?

But, if this substantially reduces sooting on the turbo shaft, then it's worth a look.

 

I just made the switch, I love everything about the 6.7 and auto. I only use mine for towing and plowing my driveway and some empty driving from time to time. The new truck runs smoother, quieter, has more power and almost no turbo lag. I also like the fact that this motor is designed to run ULS fuel which is one less thing too worry about down the road.

 

I sure wish they could do away with the EGR, it may work great on a gas engine but I think it BS on a diesel.

 

DR7--------? Just curious. Why would running ulsd be something to worry about down the road? I run B-20 which does not require adding any 2 stroke or Lucas etc etc as some do. Not being argumentative, maybe something I don't know about, and should, thanks.