Interesting, I am not touching my tune.... Yet. Ill let the warranty expire first.




I want to tune it bad though...

 

Wow those are great numbers. Seems a little fat for pump gas only at that AFR, especially with Direct injection. Seems everything I have read points toward being able to go a tad leaner with these.

 

I hear the DI engines like mid 12's for FI. I'd be interested to play with one of these trucks on the dyno to see what works and what doesn't.

1-2 and 2-3 shifts sound like you are shifting a T56. Sounds cool as hell for an auto

 

The tune is a little on the conservative side. The torque management was removed but the computer still cuts the throttle back between shifts. My tuner battled this for a while and no matter what he did he could not get it to power through the shifts. He is investigating the problem and when he finds a fix I will have him retune the trans. Its really bad at about 3/4 throttle. Sounds like you hit the rev limiter then slam the next gear.

 

O and BTW headers drop your boost a lot. The kit I bought comes with a 3.85" pulley and is advertised to have 7-8 pounds of boost on a stock 5.3. I ordered the tuner kit and opted for the 3.7" pulley and only ended up with 6 psi. Wish I would have went with the 3.4" pulley. O well maybe in the near future....

 

wow this truck is awesome! im guessing these numbers are with the converter unlocked right?

 

Yes unlocked. My tuner believes the stock fuel system is probably good for another 75 RWHP.

 

From 20 roll and spinning.

 

seems like it's shifting a little better now

 

Its not to bad at WOT.....