Tuning on the LLY

[Kennedy]

Next weekend Brandon plans to run it at the 1/8 mile track I believe.

[BMDMAX]

We did 471HP and 990 foot pounds of TQ with the tune on the Dynojet. I am really enjoying this tune as a daily driver. Great street manners, smooth power delivery and it makes a great tow tune IMHO if you have a trans to back it up.

Absolutely no problems getting the load moving and it really does not take much pedal to get 10K moving along smartly. EGT's towing ranged from 900 to 1100 degrees and even stepping into it on the bigger hills to see what it would do yielded 1200 degrees. Running boost was nice and solid at 20 pounds. We got 11.3 on the high MPG towing between 70 and 80 MPH the whole way. I think this tune easily outperforms the Juice for towing.

Again, this is the first LLY program that really gets me to a LB7 like performance. Excellent work John! Only four trucks outperformed this tune at Suncoast with some pretty heavy duty mods with two of them being Pro Street race trucks and of course my LB7.

The only other LLY curve was still short of this one even running propane. Looking forward to getting the LLY to the track to see what it will do.

[Dave S]

The more I drive these tunes the more I like them. They are smooth, predictable, and have excellent throttle response, almost like driving a gasser except with much more grunt. So much grunt, that unless I

[Kennedy]

I'm actually working to detune the pedal sensitivity just a bit on the lower tunes as they can be a bit too responsive down low for those with a less aggressive driving style...

[ 02-16-2006, 06:03 AM: Message edited by: kennedy ]

[Dave S]

Are you saying I might have an aggressive driving style??????


That's funny, my mom accused me of the same thing about 20 years ago, and all this time I just thought she was crazy

[Kennedy]

I like it aggressive too. I think I'll offer it two ways. The primary issue is to be able to drive off without spinning when traction is limited and not have the whole truck jump when you hit a bump and nudge the pedal. Once you get used to the aggressive pedal it's quite easy to drive, byt equate it to speeing up the mouse substantially on your PC.

[Mark Rinker]

Looks like you have hit the nail on the head, John.

How much for a bundled 4-5" exhaust system and the switchable Performance/Economy Tow tunes for my '05 LLY?

[Kennedy]

That would run approx $1200 off the cuff.

[Mark Rinker]

Do you expect better towing fuel mileage with the 'ECONOMY' setting over stock? I'd be happy to use my '05 LLY as a test mule towing 25' gooseneck trailer and 6-8K loads with the 'ECONOMY' setting. As long as the overall towing mileage was better - I'd buy that tune.

I may have asked this before, but is it possible to have the ECONOMY towing tune engaged only when TOW/HAUL is activated, and stock programming otherwise?

[Kennedy]

Brandon has been knocking down 11mpg with his LLY on the race tune. This is an improvement for him with this same load.

As for which tune is used when, we have a simple toggle switch that will take care of this.