L8T 2024 2500HD Promgrammer questions

[Ben Jardine]

Anyone have any REAL world experience with programmers for the 6.6 gasser 

Looked at a few did some google searching but i want real opinions on anyone who purchased one. 

I own a towing company i use my truck for hauling 5th wheel campers and equipment.  10 000 to 20 000 pounds on a regular bases . I currently have 25 000 km i only use the truck for hauling on a weekly  bases 

[bruceb58]

You mean programmers where you are modifying fuel tables? If so, leave it stock.

[newdude]

19 minutes ago, Ben Jardine said:

Anyone have any REAL world experience with programmers for the 6.6 gasser 

Looked at a few did some google searching but i want real opinions on anyone who purchased one. 

I own a towing company i use my truck for hauling 5th wheel campers and equipment.  10 000 to 20 000 pounds on a regular bases . I currently have 25 000 km i only use the truck for hauling on a weekly  bases 

 

 

None.  Nothing.

 

The only one who will likely have anything coming is HP Tuners.  So far they only have support for the ECM in 2020-2023 HD gas which are GM Global A.

 

The 2024s are GM Global B which has all sorts of changes vs. A.  HP has ECM support for some Global B trucks but not the HD yet.  None of the HP stuff is "programmers" rather its full on tuning software which allows for tuning of the ECM by an experienced tuner either on a dyno or on the street (where safe to do so) via HP Tuners software.  

 

That said, sounds like you may have bought the wrong truck if you are towing 10,000-20,000lbs daily.  Diesel would have been the better move. 

 

 

Edited April 10 by newdude

[Ben Jardine]

51 minutes ago, newdude said:

 

 

None.  Nothing.

 

The only one who will likely have anything coming is HP Tuners.  So far they only have support for the ECM in 2020-2023 HD gas which are GM Global A.

 

The 2024s are GM Global B which has all sorts of changes vs. A.  HP has ECM support for some Global B trucks but not the HD yet.  None of the HP stuff is "programmers" rather its full on tuning software which allows for tuning of the ECM by an experienced tuner either on a dyno or on the street (where safe to do so) via HP Tuners software.  

 

That said, sounds like you may have bought the wrong truck if you are towing 10,000-20,000lbs daily.  Diesel would have been the better move. 

 

 

I tow out of province . I have 2 diesels now . I wanted a truck that i didnt need fuel permits to haul province to province and i dont want to deal with new diesel emmisons related issues . The price difference between gas and diesel i am still coming ahead . The 6.6 and the 10 speed allison handle everything beeter then my old LB7 i had and better then my 7.3 powerstroke i use to own . 

[Ben Jardine]

1 hour ago, bruceb58 said:

You mean programmers where you are modifying fuel tables? If so, leave it stock.

More then fuel tables . Remove tourque management.  Timing tables and fuel trims. New trucks are very detuned from the factory . I dont have to worry about emissions where i live we have no smog laws . 

[bruceb58]

28 minutes ago, Ben Jardine said:

More then fuel tables . Remove tourque management.  Timing tables and fuel trims. New trucks are very detuned from the factory . I dont have to worry about emissions where i live we have no smog laws . 

I still wouldn't touch it. BTW...former EE for GM. Spoke at length with people in the engine ECU areas and they wouldn't touch an aftermarket tune.

[CamGTP]

1 hour ago, Ben Jardine said:

More then fuel tables . Remove tourque management.  Timing tables and fuel trims. New trucks are very detuned from the factory . I dont have to worry about emissions where i live we have no smog laws . 

They aren't really detuned at all. Removing torque mngt won't help any, sure they limit torque in 1st gear so you don't do burnouts but the rest of the torque mngt is there for shifting, they pull power away to help the transmission shift but that is so lighting quick you don't even notice that it yanks 30 degrees of timing.

 

Sure you can add a few degrees of timing at full throttle and enable power enrichment sooner as well as changing the commanded air fuel ratio at full throttle but that only amounts to minimal gains. I've tuned many 5.3 and 6.2 trucks, there isn't just magic horsepower to be gained. The 6.6 is just a bigger 6.2 that makes less power because of camshaft design and I believe compression ratio differences.

 

Trucks don't live in PE mode all the time and if they did, you'd be getting 2-3 miles to the gallon. Where your trucks sits in the rpm range pulling trailers is going to be in the sweet spot already, a tuner isn't going to make that any better.

 

But like the guy already said, nothing is available for those trucks for tuning.

[Epsilon Plus]

There is plenty of power options available for the L8T for steep prices. If HPT can break the Global B HD truck it will open that market to you.

 

Tuning isn't going to do much to stock worth the cost. However, if one was to put the Stainless Works 2" headers/full exhaust on and walk the LT2 cam in and tune on 91, the engine would churn out 550+hp off the crank. The blower kits on 20-23 ECMs are putting down 700tq on 5.5psi stock everything else.

 

For a tow rig you wouldn't want the cam/exhaust route unless you wore ear plugs full time. Any type of increased power route is going to drain fuel out of the truck like there is a leak in the tank so not really a good idea for a business rig either. 

 

You may enjoy the throttle response improvement of the lameo pedal commander/Pulsar LT route if/when they are available for 24+ (might be already, I dunno) but it's not a tune or power adder.

 

 

CamGTP, I swear I've seen you around since the LS1Tech/LS1GTO days. Us ol forum fogeys are still hanging on!