HP Tuner and tuning the 6.2 L and 6LE80

[72dan]

I tuned my 2014 Silverado in 2016-2017.  I never fully understood the software, there are classes for it.  But made some changes based on what I read.

I shortened shift times, reduced torque management and I believe some engine timing from a posted corvette tune.

 

It was okay for a while, sometimes a glitch and on the edge as far as knocking.

Now it's hot weather and more frequent problems but also in the sold some bit.

At part throttle it will surge, kind of hunts between gears, then will throw a flashing engine light.

My notebook computer was stolen years ago and lost the software.  Just bought it again, have my original and new tunes.

Will put it back to original and then need to tune again.

 

First question, is anyone experienced here with tuning the 6.2L engine with the 6 speed, that combo was only offered for a year or two, then 8 speed.

It was far from optimal stock, the torque management I was convinced I had the 5.3 liter motor. The point of the bigger motor was torque to tow.

I have since sold my trailer so I don't tow but still for acceleration reducing the torque management probably reduced 0-60 mph by a full second.

 

I have seen some stuff about changing out the thermal bypass/management valve on this transmission. I know I need a fluid change and am guessing it is in the pan, want to get is done at the same time.

Are there some shops in the Los Angeles area that other members here can recommend to do that work.

 

Even with the tuning I did the shifts are nothing like my E92 M3 DCT. That trans is stock with the GTS software, chirps 2nd and 3rd gear every time, downshifts quickly when in auto mode and I hit the gas.  The mapping on that car got better over the years as BMW kept refining it.  GM doesn't seem to do that.

Is is possible to get quick hard shifts under full throttle, enough to chirp the back tires in 2 wheel drive?  A have 4 wheel drive and there are different profiles to program.

[CamGTP]

I've tuned many trucks with that transmission. I can't change your tune for you as I don't have the newest software that allows me to edit your tune. The most I can do it look at your current tune and post up a tune from another truck that you can use the compare feature with, then you could copy over the changes to your tune and save it.

 

Chirping the tires really comes down to what tires you have on the truck, the weight of the truck and the surface the truck is driving on. Some really cheap tires that don't grip the ground that good and some nice smooth asphalt or concrete can make the tires chirp. But you have to remember that a harsh shift into say 2nd gear is kind of a big shock to parts. To aggressive and you can break things inside the transmission on a 5,500lbs crew cab truck.

[newdude]

IMO, put the stock file back in first and make sure that on the stock tune your truck is mechanically sound and there are no check engine lights, messed up shifting or any of the other issues you are currently having, and then from there, make a new tune for it.  

 

Tire chirps on shifts don't equal fast so I wouldn't be worried about that.  The guy who did my 5.3 did some mild torque management massaging (you do NOT want to get rid of all of it) turned on the flex fuel (I installed the sensor ahead of time) and some light timing tweaks.  Set it up for 93 and E85 (tuned with active alcohol content of 70%).  He also then bumped the shift pressures, I think line pressure a hair and if I remember did either shift timing or something else related to shifts?  It definitely shifted faster than stock and much more crisp.  

 

Thermal bypass is external to the transmission.  Don't even bother with the GM updated valve, go right for the pill flip or SureCool delete kit since you are going for more of a performance route.

 

 

[JONBLARC7]

I have head,cam, forged pistons plus all the bolt-ons in the that combo.  It's will blow the tires off 1-2.  But it won't chirp the tires like my wifes Scat Pack or her old SRT8.  Once it looses traction it's gone and the tires just start spinning.  I set the trans to shift harder at one point but in the 6l80e it just feels like it's going to break sometime.