See it here. Still putting out over 600 ft.-lbs. at 3000 rpm.

http://media.gm.com/us/powertrain/en...LBZ_Sierra.pdf

 

Wait till you see the 6.4...twin~!~
Ford of course

 

Yeah. I'm waiting . . . .

And waiting . . . . .

And waiting . . .

 

The 6.4 Twin will blow that out of the water. I wander what Ford will do with the power output. Right now they have the least amount of power, but still manage to kick everyone's butt. Maybe not the '06 Dura, but the '05 PSD killed all other '05's, manual, or auto, doesn't matter.

 

Has anyone heard anything officially form Ford about the 6.4. I hear everyone talking about it, but I haven't seen anything from them about it. I just hope they get all the "bugs" worked out of it, before the public gets it. From what I'm hearing it should be pretty impressive!!

 

I havent heard anything. As far as I know, the 6.4L is still a rumour. If we do get a 6.4L I hope that ford does this right, and tunes it more to low end torque, under the 2000RPM range. We've seen that the V8 design is every bit as capable as the straight 6 design to create that much torque down low, so I hope Ford goes this route. That '06 Dura sounds like it will be a fuel pig, not too mention when pulling.

 

Wait a minute. First you say this:

The you say this:

I know that this is a Ford site, but geeeez man, try to have a little objectivity.

 

well, if the 6.4 twin does happen i don't see how it couldn't be the most powerful engine out there.

 

well I heard the dmax is getting bumped again in 2007 when the new trucks come out.

 

They're completly redesigning the sd for 07, right?

I thought ford generally avoided introducing new models+engines at the same time to minimize problems.


Edit- To get back on topic a little, the graph is pretty impressive. Should pull fairly well with the new transmission being added also.

 

I actually highly doubt that the new PSD will match those on paper numbers at the engine.


As for real world conditions though... That will be an entirely different story.
What they don't show is the defueling requirements of the Duramax to keep the transmission alive, so while that is the power/torque graph, it isn't like that in every gear.

It will even be interesting to see how the new Duramax stacks up to the current 6.0l on the road.

 

That torque curve seems a little peaky to me...I dunno.

 

Here you go. How about 600 ft-lbs (at the wheels, not the crank) at 3700 RPM?

Even that Dmax still a narrow powerband. Stops at 3200 RPM? I just dont get it. There's no reason not to draw it out more.

Sure, down-low grunt is great. I want some ***** up top, too, though.

If I want something that will tons of down-low power, run like a scalded dog, and have some reliability...I'll buy a Crummins.

PS-Yes, the chart I posted is of tuned trucks, the D-max is stock. Shut up and don't bother saying it because frankly I don't care.

Captain p4 and Big raise a good point...lets see what it puts to the ground vs. the present Ford and future Ford when it comes out. Transmission de-rate will come into factor here plenty...Frankly, I couldn't care less what comes out at the crank; I still haven't figured out why they quit giving whp ratings and started back with the bhp ratings from the 60's.

 

If you read the description of the new 6-speed Allison, you will see that it's torque rating has been upped to 650 ft.-lbs. specifically to deal with the LBZ.

Is this what you mean by "de-rate"?

Which means to me that the engine computer "takes its foot off the gas" during a shift.

 

That's exactly what happens. I have to deal with at least 3 or 4 customers a week that claim they have a transmission problem because of what is going on during a shift. Preservation of the drivetrain is of utmost importance for the torque numbers these new engines are making.

Cody