I have found that Max torque is only 755 with HPTunners. Because of torque management the max torque of your LLY will only be 755. And you cant turn it off with hpt.

If thats true then it sounds like hp is a waste.

I am not sure about that. I am sure Bill will chime in. That is not a problem on the 06 models.

That is correct . This dose not hold true for 06-07 LBZ ,and im sure LMMs

*shrug* I see what parameter your talking about but I also see it in "the other" program & it has the identical limit on LLY's so someone is getting around it somehow because there are some very high hp/tq LLY's out there.

Trying to use mssnap to post screenshots, but file to big .click on engine-torque management-engine torque-peak torque . Hi-light the whole table,and change values to 800 . click = they will automaticly change back to 755. I have tryed this on an 04.5 and an 05 . This tells me that torque management will not allow more than 755. Also go to fuel control-diesel, and look at torque management quanity low med high. You will see that this table only goes to 738ft.lb . On an lbz you can change the 738 to 1000 and smooth between horizontal bounds. you cant do this on an lly. At least i havent figued out how.

Bill ,What is "the other" program?

Trying to use mssnap to post screenshots, but file to big .click on engine-torque management-engine torque-peak torque . Hi-light the whole table,and change values to 800 . click = they will automaticly change back to 755. I have tryed this on an 04.5 and an 05 . This tells me that torque management will not allow more than 755. Also go to fuel control-diesel, and look at torque management quanity low med high. You will see that this table only goes to 738ft.lb . On an lbz you can change the 738 to 1000 and smooth between horizontal bounds. you cant do this on an lly. At least i havent figued out how.


I have chanced it on the lbz one with no problems too. I wonder why you can not on the lb7 & lly.

Bill ,What is "the other" program?

The other one in this section of the forum ;)

I have chanced it on the lbz one with no problems too. I wonder why you can not on the lb7 & lly.

Its a limitation of the pcm's space to store things...when creating a calibration the engineers determine how much room every table or parameter will need and assign it just that amount of room. Even though one extra character may only take up xx amount of space it still takes up valuable space within the pcm, something that theres a lack of especially in the older pcm's.

Is it possable to swap an lly pcm with an lbz. Or lb7 with lbz. The newer pcm would have the space correct? Well how would you go about getting arround the torque management? There is no Place in this program. I had an 04 ls truck and I could turn it off on that truck. There has to be a way.

I am Not dissapointed with this program on my 2 lbz at all. On the lbz it ROCKS! I cant wait for the 6 speed allison tuning. When yall get a beta version I want it.

Is it possable to swap an lly pcm with an lbz. Or lb7 with lbz. The newer pcm would have the space correct? Well how would you go about getting arround the torque management? There is no Place in this program. I had an 04 ls truck and I could turn it off on that truck. There has to be a way.

I don't see a point & don't believe it to be possible, if others are making 1000+ft/lb with the stock pcm there should be no reason you can't.

-Bill

But how do you get arrount TM?

I don't see a point & don't believe it to be possible, if others are making 1000+ft/lb with the stock pcm there should be no reason you can't.

-BillI just dont see how with this program on an lly.

I don't see a point & don't believe it to be possible, if others are making 1000+ft/lb with the stock pcm there should be no reason you can't.

-Bill

Personally, I would hope 750 ft/lb of torque would satisfy my cravings. I am more interested in finding out if you guys plan on developing a way to switch between tunes, so I don't have to re-download each time I need to go from a performance tune to a tow/haul tune, etc. Any plans to do this in the works?

After doing a little research it simply looks like once that TM limit is reached there may be one or two tables the pcm then references for fueling & such, Im going to find out if this is how it works & if so what tables it looks at & if we have access to them, if not I'll get them added & if so I'll point them out for all ;)

Thanks for the help .

guys the engine doesnt actually "make" whatever torque is listed in those tables. Its only used by the ECM as a reference. You dont even need to touch those torque tables because they are used during shift defuel only. My tune that ran 12's on fuel only used base torque tables that were pretty much stock. ;)

guys the engine doesnt actually "make" whatever torque is listed in those tables. Its only used by the ECM as a reference. You dont even need to touch those torque tables because they are used during shift defuel only. My tune that ran 12's on fuel only used base torque tables that were pretty much stock. ;)

Ben is spot on for the most part. Max engine torque vs. RPM will limit fuel even if the truck is not shifting though. 755/6 is the max in both software suites.

I thought that after the engine reached that specified torque.torque mannagement would detect peak torque and cut fuel. I wrote a tune that would run real strong but would defuel before shifts. I thought that was the torque management doing this.

I thought that after the engine reached that specified torque.torque mannagement would detect peak torque and cut fuel. I wrote a tune that would run real strong but would defuel before shifts. I thought that was the torque management doing this.

The shift defuel is dictated by the 'Base Torque' and 'Torque limited injection quantity tables'. While scanning the truck, look to log a value for commanded engine torque as well as the other common fueling parameters. This should make things clearer.

Don't get hung up on 755 Ft-lbs. It just means that truck will limit fueling to whatever fuel value you put in for 755ft lbs. If you put in 100mm3, the truck will still fuel using the pulsewidth values for 100mm3. It has no way of measuring engine torque except to use the mm3 vs.torque tables (which you control).

Nick

Thanks for the info Vortecfcar. Now if i can just figure out timeing. How many timeing tables dose efi live have for lbz's?

Thanks for the info Vortecfcar. Now if i can just figure out timeing. How many timeing tables dose efi live have for lbz's?


You really only need one timing table. Most people leave pilot timing alone.

Hpt has 5 timeing tables for lbz. Pilot 1, 2, 3, Post 1, and 2.LLY Has 3 Bero low, med and high. Im trying to figure witch one for LBZ.

I can scan main injection , But not really a main injection table. Not unless Main Injection is actualy pilot 3 table ?

My tune that ran 12's on fuel only used base torque tables that were pretty much stock. ;)


just think what would of happened if you upped the value:D

:iamwithst

K, Just a heads up its called Torque management fuel quantity & its under Engine-Fuel Control-Diesel-Torque Mgt Qty is what you'll need to adjust fueling once you hit this TM limiter.

http://www.thetuningdoctor.com/HPTuners/Pics/DieselTMFuel.jpg

The shift defuel is dictated by the 'Base Torque' and 'Torque limited injection quantity tables'. While scanning the truck, look to log a value for commanded engine torque as well as the other common fueling parameters. This should make things clearer.

Don't get hung up on 755 Ft-lbs. It just means that truck will limit fueling to whatever fuel value you put in for 755ft lbs. If you put in 100mm3, the truck will still fuel using the pulsewidth values for 100mm3. It has no way of measuring engine torque except to use the mm3 vs.torque tables (which you control).

Nick
Hi Nick,

I see on your web site that you're big into EFI Live... any plans to get into HP Tuner tuning? That's what I have (since it also tunes my turbo Solstice).

Thanks,
Russ

PM sent

Yeah Nick. Any word? Come (back) to the dark side Nick. :) If you need a mileage tune tester shoot me a pm. I have heard really good things about your tuning. Have a good one.