John Shiels

good for track junkies I guess. Good for sales I hope also. Ford at 5/60 now also. They said they extended other parts of the warranty also. This is for 07 models.

Falcon

I'll buy another GM product.

Any idea when they're putting the Durmax & Allison Xmission in the Suburban/Yukon XL? Man, when they do that, I'm trading immediately.

John Shiels

most forums they say no there is not enough room. It would be crazy if they designed a new vehicle and didn't allow for that. I think diesel is 100,000 now on engine and possible the tranny?

They may not want to release if they can yet because it may cause people to wait and kill present sales. HD pickups are due after January and I know they are rushing them may be they will come after that gets done. The Excursion will last a while but not forever. I think the new Expedition will have a diesel option but it will be a smaller diesel not for towing like Excursion does now.

Ford sold 50,000 + Excursions the first year and it dropped to about 20,000 when they canceled it.

ghoffman

What's the deal with diesels and the new low sulfur fuel '07? My dealer was trying to steer me away from a diesel...

Wicked Weasel

0Randy@DRM

It maybe time for me to go buy a new truck. Gas for me, because they are nicer in the winter time. Plus I know how to work on gas trucks. Injector pump and I haven't meet before and I hope we never do.

Randy

NJCRUISER

From what I have heard and read, GM is modifying the existing 6.6 duramax platform to meet the new diesel laws. Dodge is going from the 5.9 to a 6.7 L Cummins with Allison option! in January. Ford is having International build them an advanced 6.4L with piezo ceramic injectors -early 07.

ghoffman

Ok, thanks, but will these new engines require a different fuel or is all Diesel fuel changing?

NJCRUISER

Gary, the roll out of Ultra Low Sulfur Diesel (USLD) began on June 1, 2006 and is scheduled to be complete by late 2010. According to the plan, owners of '07 and later model year powered diesels must refuel with USLD. '06 and earlier diesels can use either usld or the old lsd fuel during the transition period.
For the most part. power and performance shouldn't suffer with the new fuel, but fuel economy is expected to be lower because the process that removes sulfer can reduce the energy density of the fuel. That, of course lowers the miles per gallon. Expect about a 1 percent loss across the board.
The new fuel will have lubricity and stability additives mixed in at the refineries, making the fuel compatible with older engines. Those engines will have a bit more flexibility in the they can burn the new fuel as well as the earlier blends if necessary. The newer engines cannot.

Maybe this is why pretty much all of the new diesels are being engineered to make more power whether by displacement or technology to adjust.

Heres an article on the new duramax:

A stronger Duramax turbodiesel engine will be available on Heavy Duty GM trucks starting next year. Thanks to numerous improvements, the V8 will now make 360 hp at 3,000 rpm and an incredible 650 lb-ft of torque at just 1,600 rpm when ordered with the Allison automatic transmission.



The Allison 1000 has also been upgraded with a second overdrive gear so trucks can cruise at 60 mph while making just 1,550 rpm. It also includes a thumb-activated shifter, and cruise control grade braking that will automatically downshift to maintain a steady speed on downhill grades.




So what did the engineers do to increase the Duramax output by 50 hp and 45 lb-ft of torque while making the engine run smoother, quieter and cleaner? They changed a lot of things, such as:

-Improved block casting and machining
-Upgraded bearing materials
-Pistons designed to lower compression from 16.8:1 from 17.5:1
-Increased piston bore diameters
-Thicker connecting "I" rods
-Revised cylinder heads for the new compression settings
-Maximum injector pressure increased from 23,000 psi to 26,000 psi
-Higher pressure fuel pump
-New seven-hole fuel injectors that spray directly on improved glow plugs
-A smoother and more efficient turbocharger
-Quieter air induction system
-EGR with a larger cooler for more airflow
-New 32-bit E35 engine controller for better efficiency and lower emissions
-Added a 600-watt grid heater in the intake to reduce smoke during cold and light-load driving

John Shiels

And the cost is? I have heard all kinds of quotes.

Wicked Weasel

1 million dollars


still looking for a diesel excursion. If I lived in Texas I would have one already

NJCRUISER

The EPA estimates the cost of reducing the sulfur content of diesel fuel will result in a fuel price increase of approximately 4.5 to 5 cents per gallon. The EPA also estimates that the new emission standards will cause an increase in vehicle costs between $1,200 to $1,900 (for comparison, new heavy-duty trucks typically cost up to $150,000 and buses up to $250,000).

ghoffman

That would make the diesel/Allison option near 10K extra which puts it out of my range. I'd rather get an 8 liter Rat motor with the Allison.

John Shiels

10 grand extra they won't be selling many. I am thinking in the 6 range.

The GM diesels were 100.000 on powertrain already.

xilr8n

With the big trucks there is a new particulate filter in the exhaust which will require service. It is what is making the new engines $4 or $5k more.

Around here we have switched over to ULSD already because the refinery is only making the one type.