I know some have some heavy towing miles on the LML's now but I haven't seen anything posted on the EGT numbers in extreme situations; that is 14k plus on long 6 to 7% grades. Our current LBZ can see 1400plus pretty easily if pushing it even with manuel downshifts before lugging starts; wonder what to expect with the new LML when it comes in.
Randy

I've probably towed right up there for heaviest loads. 29.5k gross. Mountains in Montana and Idaho so some pretty serious grades. 1375 is the highest I've seen. 3rd gear 55ish 7% grade. Typically I can hold 4th up a 6% at 65ish runs around 1300.

Hope that helps!

I don't know how GM did it, but the increase in HP and TQ didn't change the cylinder pressure, stress, and temperatures from the LMM. I guess better injectors and more efficient air. When people start to do tuning on these new Rigs, it should be very impressive. stronger tans, pistons, rods, output shaft, fueling, front end, and etc... These new trucks are a great platform to start with and I was impressed with my LMM.

I've probably towed right up there for heaviest loads. 29.5k gross. Mountains in Montana and Idaho so some pretty serious grades. 1375 is the highest I've seen. 3rd gear 55ish 7% grade. Typically I can hold 4th up a 6% at 65ish runs around 1300.

Hope that helps!

Thanks
Sounds like I can expect some improvement over the LBZ.

I don't know how GM did it, but the increase in HP and TQ didn't change the cylinder pressure, stress, and temperatures from the LMM. I guess better injectors and more efficient air. When people start to do tuning on these new Rigs, it should be very impressive. stronger tans, pistons, rods, output shaft, fueling, front end, and etc... These new trucks are a great platform to start with and I was impressed with my LMM.

A big help is that the extra fuel no longer needs to be injected in the cyl for regen for the DPF, rather it is handled by the injector downstream in the exhaust. Plus with the Piezo injectors you can have 5 or so injection events, thus there is more combustion control (noise/peak cyl temp and press), and at higher pressure (29K) so it is more efficient which can equate to more power with the same amount of fuel.

Thanks
Sounds like I can expect some improvement over the LBZ.

:funnypost

Understatement of the year!

:lol:

:funnypost

Understatement of the year!

:lol:

Really!
Don't see as there is that much difference; especially since all tunes add extra fueling, even Kennedy which is excellent.
Care to expound?
Randy

Same fueling system, don't see a lot more power coming from the new motor with a tune, we would need a new turbo that flows some air and a bigger fuel system, the stock CP3 gets maxed pretty easy...