Tune advice to wake up tow rig

[nsogiba]

My '05 Suburban 2500 (6.0/4.10s) is used as an occasional tow vehicle about a half dozen times a year. I pull a car on a trailer with tools and tires, or a 28' TT with weight about 7K lbs.

In WNY we have fairly mild elevation changes but I'd like a little more oomph out of the tune without having to make any mechanical changes. This is my DD/family hauler so I'm not interested in a cam, deleting cats, headers/exhaust that will inevitably drone, etc.

I have HPTuners - what are some changes I can make in the tune to boost midrange torque in the 2.5-4.5K rpm range? I am not opposed to running 93 octane if need be.

I am aware of the changes to enable Power Enrichment (remove time and RPM delay, etc). Just wondering if there is any other "low hanging fruit". Not looking to make any changes that will negatively impact transmission or drivetrain durability.

 

[Marky Dissod]

I have HPTuners.
What are some changes I can make in the tune to boost midrange torque in the 2.5-4.5K rpm range?
I am not opposed to running 93 octane if need be.

Did you make any changes to the Tow / Haul shift table?

Try adding 1 degree of timing to both spark tables and making note of the changes.

 

[Mudsport96]

Did you make any changes to the Tow / Haul shift table?

Try adding 1 degree of timing to both spark tables and making note of the changes.

I would add that I would not add 1 degree globally. I would only at at cruise rpm. And then definitely monitor knock retard.
Heck I would almost say datalog while towing first and see if you can get away with it.
I know from personal experience with an 02 LQ4/4L80e/4.10 2500 Sierra, just running 93 helped. And I know the naysayers will say you don't get more power from more octane. And technically they are correct. But, while watching knock count between 87 and 93 while towing in the summer, ( almost at rated max gvw). Knock count was substantially reduced almost to nonexistent on 93. This let's the engine run on the factory high octane ( more aggressive) timing tables. Which.... gives you more power.
So something you could try is datalog with both 87 and 93. See if you suffer high knock retard on 87 and if it goes away on 93. That can save you tuning time in itself.
Second. If you don't do offroading and don't traverse standing water. See if you can make up a true cold air kit. Not a prefab hot underwood air kit. Outside air that is cooler will also stave off knock. Thus adding to power

 

[SundyO]

You could tune your transmission shift tables to let it climb higher in RPM and downshift faster. Keep the RPM in higher range. Also unlock the torque converter under acceleration to let the engine climb up in RPM quicker. Lock it back up when cruising. Keep an eye on those transmission temps tho!