The vehicle is a 05 ecsb 4x4 L33 w/radix doing 7psi, 3.42 gears. HPTuners tuned.

I have been logging WOT runs to 125mph. Around 110 or so mph in 3rd gear the motor changes sound slightly like it hit a head wind or something. I have a CAI and the blower whine changes tone just a tad and the acceleration seems to decrease just a teeny weeny bit, all this in about 3 seconds and it returns to normal and I continue to 125.

What the heck is it? I have experienced this before in a different truck normally aspirated with a predator hand held tune.

I'm a noob tuner and the current tune is not my child. If it's in the logs I wouldn't know how to see it. It maybe a PE thing?

I'm attaching my tune, scanner config (Change the .txt file to a .cfg), and log in case you guys can spot it in there.

Any comments on the tune are welcomed.

Thanks

 

Can't see your tune file from my work station, what speed in 3rd is your converter commanded to lock-up?

 

And now you get to see how green I am at this.

If you are talking about TCC Apply/Release Speed vs. TPS vs. Gear - Normal

@ 100 % 3rd apply is 82.

I hope you give me a good look over.

 

Sounds like the converter is locking and then unlocking by the way you describe it.

 

Hmm, well fuel is right on, no spikes or anything, timing is flat as a board, no knock or burst knock, converter is already locked, IATs stay relatively stable, boost stays constant, and the rpm and speed slopes are near perfectly linear...

Everything looks fine to me.

Couple things though, try to only use 24bits on your scanner, ie, delete some stuff. When you go down to 24bits you double the frame rate on the scanner. You dont really need to see 02s switching when you have a wideband. Nor do you need the injector pulse width logged since you know your injectors are fine. A higher sampling rate is more useful than a bunch of sensors with a low frame rate.

If you are still running the stock converter I wouldnt have it lock at the shift like you are now. The trans is upshifting and locking at the same time.

I cant really find anything wrong with your tune though...

Try logging converter slip and see if the converter is slipping.

 

the converter may just be locking on you. Mine would do that, right after the 2-3 shift, rpm's drop it'd lock, rpm's would drop again, then pick up as momentum increased. I now have my tune set to NO LOCK @ WOT it's a bit faster and less stressful on the trans and lock-up clutches

 

@ Atomic,
I'm flatterd by your praise. You warned me about the 20's across the board in another post in the original tuners setup, and this drove me to building a slope. Glad it looks OK, or at least not like a hideous attempt but a noob tuner.

@ Atomic and trever1t, I'll be all over the no lock @ wot.

To keep from guessing, is this a pic of the right place?
Do I set the 3rd apply 100% to 256?
Anything else in there to change?

 

I also noted in my log the IAT temp goes to where it's supposed to add near the same time it happens. Below is how i found it.

 

I actually took a look at your spark table and remember thinking I should show this that guy who was asking about the flat table, I didnt realize it was the same person, haha.

I attached my TCC file for you to look at. I have a 2600 stall and I spent a long time on 3rd and 4th gear apply/release. TCC settings at part throttle are very touchy, but the main thing to notice is my TCC will not lock above 85% throttle in 3rd or 4th gear.

Your IAT is already in the first block during the entire run, so nothing is changing with fuel during the run. If you want, add the AFR CMD to the scanner PID and make sure it matches what you have in the PE table.

 

OK,

I'm gonna take a baby step and just disable the 3rd gear @ 100% and see if there is a change.
I'll look for the PID and loose some bits too.