GM's Next HD Duramax

[FishOnOne]

Looks like GM is setting the stage for a potential HP & Torque increase over the competition. :B

Link

[MARK_VANDERBENT]

Thanks fishOnOne for that very recent pull off test. I did not read that one. Numbers being lower and that truck still can kick butt !!

[bogeygolfer]

macsplinter wrote:
I will keep my money and continue to drive an old 2005 duramax that is underpowered and out of date. If you have 65000 to 70000 to blow on the latest and greatest, be my guess. I need a good laugh.

Ditto. Our 2005 has been great, and virtually trouble-free. Heck, I'm still riding on the original brakes. And I can't imagine needing any more power than I already have. Great truck.

[FishOnOne]

ib516 wrote:

MARK VANDERBENT wrote:
Those duramax trucks seem to still match or beat the completion even with lower numbers. Sometimes numbers can be all hype.

Not if you check out any recent comparison tests. They are dead last.

The D/A combo is still a good one, but the power numbers need an upgrade.

Perhaps you should read this article.

[jus2shy]

N-Trouble wrote:

Cummins12V98 wrote:

parkersdad wrote:
Buy a GM if you want but I have a feeling they are about to file bankruptcy again. Also they have been known to not back up there warranty. Who cares about these wars. My Ram has 370 hp and 800lb of torque. That is more than I need. They are going to keep on and these little trucks will have as much torque as a semi. Just crazy if you ask me. And by the way there is only one true diesel out there in my mind and it is an inline 6 called a Cummins. There is a reason they use it in the bigger trucks. Real diesels are inline 6, not V8.

Let's not forget the Cummins is a Medium duty engine and the other two are light duty.

Eeeh come on... And what exactly makes one medium vs light?

I used to believe this as well, but Ford really over-built the 6.7 for the most part. The Ford 6.7 has some pretty slick features that do make it medium duty and Ford is doing just that with their F650+ trucks using the scorpion motor going forward. I'm not as familiar with the Duramax's construction so I can't say much about it. But the Ford does a nice job using lifters with 2 pushrods to each unit so they have a bigger roller/surface area with the cam lobes. Also like the individual rockers for each valve as well in the head (no valve bridges. The reverse flow design makes great sense and reduces packaging. the Oil cooler is in an excellent location as well for servicing. The rods are a little small, even though H&S put a lot of power through the super duty, making power at relatively high RPM's is not as rough on a motor as low rpm lugging where the Cummins excels. So it's a possible weak spot for the motor. The main caps are pretty stout units as well. Bearings are also pretty huge looking in my book (another medium or heavy duty feature). The turbo was another weak spot, but it seems like this is resolved in 2015 going forward as well.

When I stared at a comparison video made against the Ford 6.7, I wasn't really impressed by what they defined as features that made their motor medium duty (seemed to be a dealership or something). It seems like Ford took all the short-comings of the 6.4 and applied most of them to the 6.7. I'd say the 6.7 is up to task. It will be interesting to see the new Duramax dissected in the near future.

[MARK_VANDERBENT]

Duramax rules !!! Im just excited to buy an 01 duramax to get 300 hp and 520 ft pounds !!!!!!

[jus2shy]

N-Trouble wrote:
Personally what I would really like to see happen in the HD diesel segment is improvements to the emission systems that are currently plaguing the reliability of these trucks as well as killing fuel mileage. Alternatives to DPFs and lowering the total cost of ownership of diesel engines would get my attention. A few more HP/TQ means nothing to me as I can easily get that and some with a tuner...

There is a lot that is currently being researched to get rid of the DPF. That's one of the big reasons for increasing the pressure to get that finer atomization and reduce the opportunity for particulate matter to conglomerate or form. I've also read up on Super-Critical fuel combustion, seems to have promise but there are lots of technical issues to overcome. The SCR system may stay as NOx is a bit tougher to control, but it is less instrusive to the tuning of the motor. I will be holding onto my truck until some sort of major advance comes to market.

[N-Trouble]

Personally what I would really like to see happen in the HD diesel segment is improvements to the emission systems that are currently plaguing the reliability of these trucks as well as killing fuel mileage. Alternatives to DPFs and lowering the total cost of ownership of diesel engines would get my attention. A few more HP/TQ means nothing to me as I can easily get that and some with a tuner...

[N-Trouble]

Cummins12V98 wrote:

parkersdad wrote:
Buy a GM if you want but I have a feeling they are about to file bankruptcy again. Also they have been known to not back up there warranty. Who cares about these wars. My Ram has 370 hp and 800lb of torque. That is more than I need. They are going to keep on and these little trucks will have as much torque as a semi. Just crazy if you ask me. And by the way there is only one true diesel out there in my mind and it is an inline 6 called a Cummins. There is a reason they use it in the bigger trucks. Real diesels are inline 6, not V8.

Let's not forget the Cummins is a Medium duty engine and the other two are light duty.

Eeeh come on... And what exactly makes one medium vs light?

[N-Trouble]

ib516 wrote:

MARK VANDERBENT wrote:
Those duramax trucks seem to still match or beat the completion even with lower numbers. Sometimes numbers can be all hype.

Not if you check out any recent comparison tests. They are dead last.

The D/A combo is still a good one, but the power numbers need an upgrade.

And which independent test(s) would you be referring to???

[Cummins12V98]

parkersdad wrote:
Buy a GM if you want but I have a feeling they are about to file bankruptcy again. Also they have been known to not back up there warranty. Who cares about these wars. My Ram has 370 hp and 800lb of torque. That is more than I need. They are going to keep on and these little trucks will have as much torque as a semi. Just crazy if you ask me. And by the way there is only one true diesel out there in my mind and it is an inline 6 called a Cummins. There is a reason they use it in the bigger trucks. Real diesels are inline 6, not V8.

Let's not forget the Cummins is a Medium duty engine and the other two are light duty.

[john_bet]

And when are we going to see hp/trq. wars in gas MH and diesel pushers and especially semi tractors that can not hardly get going now with a full load.

[hone_eagle]

gmcsmoke wrote:

hone eagle wrote:
At some point longevity is going to suffer,all this power will reduce the life of all these engines.

you really need to watch H&S' dyno videos to see how much power is needed to gernade a ford/gm powertrain.

Fuel burn fuel burn fuel burn in total pounds is the only measure of engine life not miles like advertisers would have you believe.
unless you over rev or over fuel nothing will melt or 'grenade '.
But the miles don't matter so much as total fuel burn ,the harder its used and more it consumes
the shorter the life.

[larry_barnhart]

macsplinter wrote:
I will keep my money and continue to drive an old 2005 duramax that is underpowered and out of date. If you have 65000 to 70000 to blow on the latest and greatest, be my guess. I need a good laugh.

Having new hoses installed on our old 05 out dated awesome truck today. Problem is it will cost as much as this truck was brand new almost.

chevman

[macsplinter]

I will keep my money and continue to drive an old 2005 duramax that is underpowered and out of date. If you have 65000 to 70000 to blow on the latest and greatest, be my guess. I need a good laugh.

[parkersdad]

travelnutz wrote:
parkersdad,

In your mind the only true diesel? It's because your mind in tightly closed and brainwashed and been blinded by your own lack of knowledge. Is an inline 6 the only true diesel? Better not say that to Cummins because they make the V8 diesel that's going into a couple new pickups! Must not be a true diesel then? Hello!

The Duramax 6.6 diesel V8 has now been made and sold in GM trucks with nearly the same number of their diesel engines as Cummins has in Dodge/Rams and has done it in about 1/2 the years it took Cummins in Dodge/Rams. You need to do a little research and actually learn something. Just think how smart and actually informed you could be!

Like I said I will not!!!!!!!! Buy a Chevrolet. I had a truck I got the lemon law on and I am done with them. All I am saying about real diesel is an inline 6 makes it's power down lower than the V8 motors and is a more sturdy design. The bore and stroke is a lot longer so that naturally makes more power down low. Also I'm talking about diesels in 25 and 3500 trucks not all diesels.