Any 17 Dmax owners?

[N-Trouble]

Hearing GM was able to get rid of the dead pedal on the new L5P motor. One of the worst "features" on newer diesels. Its horrible on my LML. Hear the new Powerstroke and Cummins still suffer from it however.

Any new owners out there that can confirm?

[Vintage465]

I haven't found the lag really noticeable in my 2013 Duramax. Maybe I am numb to it. This is the first modern diesel I've had and I've had many other gas and non turbo diesels prior. I am just fine with mine the way it is. I have driven a 2014 Ford 6.7 at work and it did seem to have more delay than mine.

[Dadoffourgirls]

This video indicates that it has better response.
Video

[Dadoffourgirls]

I would say that there is still some delay when suddenly mashing the pedal when already moving. When mashing the pedal from a stop, the tires start to spin and the traction control takes over.

I can tell you that the response after the moment delay will put you back into the seat.

I would think that instantaneous response would be extremely harsh. I would not modify this. On my gas 6.0 in my Express, when you floor it the RPMS jump and downshift quickly, but I feel that there is no more acceleration than the new Duramax.

[N-Trouble]

4x4ord wrote:

stufarmer wrote:
my 4x4 16' F350 Diesel Dually weights 8800 lbs. It also runs 0-60 in 8.2 seconds. I'm not sure I know what a dead pedal is.

I've got 3.55 gears in my '16 so it is probably even slower than yours. Even so I seldom mash the pedal to the floor.

I never notice a dead pedal when accelerating off the line but there are occasions in heavy traffic where I want to move out of a slow lane of traffic into the left lane. I'll pull out and hit it and for whatever reason the truck doesn't respond. The wait could be due to a downshift?

^^THAT^^ is dead pedal... Feels like turbo lag but its not. Most of the aftermarket tuner companies have removed the dead pedal feel.

[Me_Again]

Delay in throttle response could be caused by the VGT turbo being delayed it sliding its nozzle. Or th ESC waiting for it to position.

With RAM it is very dependent on driving style. On off on the throttle seems to bring it out.

Chris

[patriotgrunt]

4x4ord wrote:

stufarmer wrote:
my 4x4 16' F350 Diesel Dually weights 8800 lbs. It also runs 0-60 in 8.2 seconds. I'm not sure I know what a dead pedal is.

I've got 3.55 gears in my '16 so it is probably even slower than yours. Even so I seldom mash the pedal to the floor.

I never notice a dead pedal when accelerating off the line but there are occasions in heavy traffic where I want to move out of a slow lane of traffic into the left lane. I'll pull out and hit it and for whatever reason the truck doesn't respond. The wait could be due to a downshift?

Sounds like you're talking about turbo lag. I've never heard it called "dead pedal" but I guess it's the same thing.

[4x4ord]

stufarmer wrote:
my 4x4 16' F350 Diesel Dually weights 8800 lbs. It also runs 0-60 in 8.2 seconds. I'm not sure I know what a dead pedal is.

I've got 3.55 gears in my '16 so it is probably even slower than yours. Even so I seldom mash the pedal to the floor.

I never notice a dead pedal when accelerating off the line but there are occasions in heavy traffic where I want to move out of a slow lane of traffic into the left lane. I'll pull out and hit it and for whatever reason the truck doesn't respond. The wait could be due to a downshift?

[kw_00]

Yes I agree with you, thanks for adding additional clarification. I have always understood it from the GM mechanics that the computer ******* the timing and reduces throttle input. Then the power is allowed to come on stronger but controlled. Unlike the days of putting the pedal to the floor and getting the 4 barrel to dump all the fuel at one time. I never thought that it took torque away, just changes the way it's applied in a controlled manner. Blocked out above but another word would be slows the timing.. Yep think that would work!

[4x4ord]

kw/00 wrote:
The delay on Gm trucks is from TQ management. That is becoming all standard across the board of manufactures and it prevents stress on the driveline. You can have it reduced by a programmer, costly around 600.00 or so depending on who you go with. My gasser had the lag, aka TQ management, I run a custom tune and now it's reduced a lot. Do I drive it like a race car? No, there's no need to. I like the benefits of the tune but not for running the truck hard and reducing its life. I have however picked up mpgs. TQ management reduces the timing in the engine and it feels like a slug... With it reduced in my truck, it truck feels much more light on its toes. The negative about tuners is that the owners run at the most powerful setting, and towing heavy really reduces the life of the engine. Timing gets to far advanced and creates to much heat in diesels thereby cooking the engine. I have 89 and 93 tune for mine and just run the 89. Picked up 1-2 mpgs and the transmission doesn't shift awkward now... For some reason the GM 6 speed shifts weird going into 3 gear. Always has even when new, my neighbor owned the truck new before I bought it and told me GM says it normal. Sorry to get of topic some...

I think "torque management" is a misunderstood term. The new Duramax is said to make 915 lb ft of torque at the flywheel, so it is my understanding that it produces 915 lb ft of torque at the flywheel not 650 lb ft or some other reduced value due to "torque management."

I don't know this but my guess is that "torque management" refers to the fuel delivery being backed off while the transmission is shifting to prevent clutch damage in the transmission.

[Grit_dog]

stufarmer wrote:
my 4x4 16' F350 Diesel Dually weights 8800 lbs. It also runs 0-60 in 8.2 seconds. I'm not sure I know what a dead pedal is.

No, fords got their tq management figured out a lot better. The power strokes come off the line much harder. Haven't been in lml Dmax but the lmm models jump up and go.
'14 Rams I ran were dead pedal turds but I believe that's improved a bit.

[kw_00]

The delay on Gm trucks is from TQ management. That is becoming all standard across the board of manufactures and it prevents stress on the driveline. You can have it reduced by a programmer, costly around 600.00 or so depending on who you go with. My gasser had the lag, aka TQ management, I run a custom tune and now it's reduced a lot. Do I drive it like a race car? No, there's no need to. I like the benefits of the tune but not for running the truck hard and reducing its life. I have however picked up mpgs. TQ management reduces the timing in the engine and it feels like a slug... With it reduced in my truck, it truck feels much more light on its toes. The negative about tuners is that the owners run at the most powerful setting, and towing heavy really reduces the life of the engine. Timing gets to far advanced and creates to much heat in diesels thereby cooking the engine. I have 89 and 93 tune for mine and just run the 89. Picked up 1-2 mpgs and the transmission doesn't shift awkward now... For some reason the GM 6 speed shifts weird going into 3 gear. Always has even when new, my neighbor owned the truck new before I bought it and told me GM says it normal. Sorry to get of topic some...

[tinner12002]

Don't really notice it on mine either as I don't mash it or get in a hurry...figured if I wanted to do that I'd be driving a Hellcat! I guess some want race trucks...lol.

[stufarmer]

my 4x4 16' F350 Diesel Dually weights 8800 lbs. It also runs 0-60 in 8.2 seconds. I'm not sure I know what a dead pedal is.

[Durb]

I have a diesel SUV with a SPORT mode and an ECO mode. The only difference is a change in throttle tip in and transmission mapping to hold gears longer. The SPORT mode is a lot livelier and makes for the quicker vehicle. We drive in ECO all the time as it is a better balance for our driving needs.