brought her to the track today with about 800 miles on the clock to get a baseline before mods...

 

Not bad at all! What were the weather conditions?

 

2.133 60'
14.337 @ 97.11 mph
so far just HPTuners by me

 

good job Joe. that is a great baseline.
it was around 80 today and humid....

 

it is still hitting the fuel cutoff at 6300 rpm at 1>2 and sometimes 2>3 and 3>4 regardless of where i set the WOT shift mph and rpm. I read it may be the adaptive characteristics of the TCM just not quite settled in yet. I ran it 5 times but made a few changes after every pass. When I left the track, it shifted perfect on the street.
Anybody have this happen on a 6L80E?

 

i did hear it hit the 1-2 fuel cutoff when you left Keto's

 

nice man, and i think everyones truck shifts perfect on the streets right after being at the track haha, its just one of those things

 

it sucks - bet the people watching think I have a gearbox

 

Damn nice baseline...Wish I could of made it, Satuday night drained me...

My 07' Sierra Denali did that a couple times but it would only happen during the 1-2 upshift...This truck has never cut fuel, I did have to up my 1-2 upshift mph some to hold the gear longer when the tires are slipping... What are you commanding in your shifts? (mph & rpm)

If you want compare notes/tunes let me know...

 

I moved the WOT rpm and mph up and down quite a bit and the only time it didn't do it was the first time I brought wot rpm down from 6100 to 6000 it shifted right at 6000.
upped it to 6100 and it hit fuel cutoff at 6300

thread on HPtuners with my shift tables...
http://www.hptuners.com/forum/showthread.php?t=29001