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2006.5 DuraMax

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Engineer

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GM Press Release

 

I can't belive someone hasn't put this up here yet.

 

The buzz is all over the net.

 

The 2006.5 DuraMax will have 360 HP, and 650 lb/ft of torque. This isn't a rumor. Click above to see the GM press release :jester:

 

I hope that finally the media will give Chevy their due, and quit fawning all over that 6.0, that furd has out. :chevy:

Z71-cummins Enthusiast

Z71-cummins

Posted
Posted

Those were some massives numbers i read the article. And the Dmax coupled with the allison man what a team. How much do yall believe that engine could pull?wow 650 ft lbs of torque. :jester::chevy:

Chris97K1500 Enthusiast

Chris97K1500

Posted
Posted

I think it's very smart on GM's part to put this new engine in the last year model of the current line of HD's (instead of updating the LLY for '06 emissions). Work out any bugs, if any happen, and then release a 400hp version with 700ft/lbs. of torque with the new HD's in '07 MY. Might not happen that soon, but we'll be seeing numbers like these soon. I know I'm getting one, can't wait :chevy: ! Chris

silverado3500 Enthusiast

silverado3500

Posted
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Yes, thats all well and good (and a lot of fun to drive), but is the GVWR/GCWR being raised as well? If not, essentially they are producing a truck that has more engine/transmission than the chassis can handle. And we all know that there will be some idiots out there that decide "oh my truck can pull 30,000lbs fine.

 

I'm not trying to bash, and I'm certainly not against having 650 ft lbs of torque :chevy:, But I see a lot of focus on the engine/tranny, and not seeing a lot of changes to the rest of the truck, axles/transfer case, brakes, etc It's just making me wonder

Shawn T Enthusiast

Shawn T

Posted
Posted

Are they going to derate 1st and 6th gear like the LLY's? Because essentially the LLY puts out the same numbers as the LB7 in those two gears. It is 2nd, 3rd, and 4th that see the HP and TQ increase. That is just bogus to me, because most of the time you want more power in the lowest and highest gears. I was just talking with a guy yesterday on the job. He has an 05 DMax/Alli. I asked him how he liked it, and of course, he said he loved it. This was his fourth, the first an 01, then an 03, then an 04. His first comment was, "the 04's and 05's are supposed to have more power. If they do it is not noticeable". He said out of all four, the 03 felt like it had the most "umph". I have heard this comment from many LLY owners who previously owned LB7's. They just cannot feel the power increase. GM needs to step up the plate and put the numbers out in all gears, especially the top and bottom end IMO.

silverado3500 Enthusiast

silverado3500

Posted
Posted
Are they going to derate 1st and 6th gear like the LLY's?  Because essentially the LLY puts out the same numbers as the LB7 in those two gears.  It is 2nd, 3rd, and 4th that see the HP and TQ increase.  That is just bogus to me, because most of the time you want more power in the lowest and highest gears.  I was just talking with a guy yesterday on the job.  He has an 05 DMax/Alli.  I asked him how he liked it, and of course, he said he loved it.  This was his fourth, the first an 01, then an 03, then an 04.  His first comment was, "the 04's and 05's are supposed to have more power.  If they do it is not noticeable".  He said out of all four, the 03 felt like it had the most "umph".  I have heard this comment from many LLY owners who previously owned LB7's.  They just cannot feel the power increase.  GM needs to step up the plate and put the numbers out in all gears, especially the top and bottom end IMO.

 

 

 

 

That may be the reason that they switched to the 6 speed. Hopefully so

Roofer Senior Enthusiast

Roofer

Posted
Posted
Yes, thats all well and good (and a lot of fun to drive), but is the GVWR/GCWR being raised as well?  If not, essentially they are producing a truck that has more engine/transmission than the chassis can handle.  And we all know that there will be some idiots out there that decide "oh my truck can pull 30,000lbs fine.

 

I'm not trying to bash, and I'm certainly not against having 650 ft lbs of torque :confused:, But I see a lot of focus on the engine/tranny, and not seeing a lot of changes to the rest of the truck, axles/transfer case, brakes, etc  It's just making me wonder

 

 

 

 

 

I agree. I'm sure they raised the numbers a little. They need to get closer to 26K GCWR if not higher. These motors and trannies can handle it, but not sure about the rest of the truck in the long run. What is the point in having all that power in a 7000 lb diesel, just to drag race it. Ya that's fun, but it needs to make use of the low end grunt the diesel has, and put it to the trailer hitch without stressing the truck.

Chris97K1500 Enthusiast

Chris97K1500

Posted
Posted

From what I've read, Allison/GM didn't change any of the gearing in the tranny, just added a 6th gear. The gearing is the same as always, but don't know about whether they kept the power down in 1st like before. I doubt the towing capacity will raise much, if at all, the frame and everything else would be the limiting factor as mentioned before. It's not all about the engine/tranny when it comes to towing. One thing that may lead to higher towing #'s would be the exhaust braking, just cuz it could tow 20K lbs, it HAS to stop 20K lbs. I still think the big jump will be when the 900's roll out. Chris

whitesnake01 Enthusiast

whitesnake01

Posted
Posted
The 2006.5 DuraMax will have 360 HP, and 650 lb/ft of torque.

Thanks for posting. Sounds like this is for 2006 right off the bat rather than late release in 2006.5. This also means that the current LLY engine only had a "lifespan" of about 1 1/2 years. Raises a few questions about parts and service down the road.. Nice to see they are putting some effort into diesels and trannies. I agree with other post about us seeing 400hp/700tq pretty soon too. So the new DMAX (DMAX Gen 3) is probably only here to stay for a similarily short amount of time.

silverado3500 Enthusiast

silverado3500

Posted
Posted

One other observation. I noticed they mentioned lowering the compression ratio, and using more fuel. This gives me the impression that there might be a significant drop in fuel economy (much like the difference between the 7.3 powerstroke and the newer 6.0 powerstroke). It seems like the pushers for diesel have switched from economy to a performance mode to compete in "power wars"

 

On a slightly random side note, I'm conisdering trying to find myself a manual transmission regular cab 1500 with the silverado package (preferably high miles but with a good body/interior). I want to swap in an I-4 cummins with a 6 speed. Strictly for fuel economy reasons. It might be a fun little truck to use for errands. I'm still debating on the year range. Its a toss up between a 96-98, or maybe an early 70s model (with the bull nose hood)

Engineer Enthusiast

Engineer

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Silverado3500-

 

The reason for the lower compression ratio is for the extra HP level. To make more HP obviously more fuel is needed. So more air must also be blown into the cylinder by the turbo.

 

To allow for a larger PSI output from the turbo, the compression ratio must be dropped to avoid over pressureizing the cylinder at top dead center.

 

Any time a larger turbo is added to a turbocharged diesel, for more air, the compression ratio should be dropped in the name of reliability.

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