Topic: Holy Crap Batman, these computers are getting smart!

[KY_BOB]

I think I'm going t tune the 5.3 DOD/AFM, 6L80 myself.  I got a copy of a professional 6L80 tune from a very nice guy on PTnet.  I'm going to start there.  There are hundreds of fields that I haven't seen before. 

I do not copy and paste tunes but he gave me enough info that I feel like I have a starting point and know what fields to start looking at.  His truck has a 6.2 in it so everything other than the TM reduction inis the engine tune useless to me. 

I still feel like getting the TM out of it (since the trans will handle it) and getting my shifts where and as firm as I want is a good start. 

Wish me luck 

[MS03 2500]

I'm sure it is way different from what you saw in the 02.

[KY_BOB]

I'm sure it is way different from what you saw in the 02.

It's kind of like having 3 channels on TV and having modern cable/satellite.  It's different but most of it makes since if you spend the time reading the descriptions that HPT gives you.  The catch is that you don't know which way to go or how much without a little guidance.

I have some good ideas now.  I just have to ease them into the truck.  I really think that I can get a 20ish mpg truck on the highway but that will still get with the program when you get on it.  At least, that's my goal.

[MyBigToy]

I'll let you be the guinea pig and see how successful you are. Once you know your way around I'll pick your brain so that I have an idea about how TM works and where to make changes. Like I said before, I spent some time looking around at an 07 Vette program and there are so many different parameters and inter-relations between them that it's mind-boggling.

I hadn't thought about approaching someone on corvette forum about sending me a tweaked HPT file to nose around in and compare to the stock tune.

Good luck and keep up posted.

[Main One]

I knew you wouldn't "bluedevil out" and would eventually start doing some tuning on that thing!   

[KY_BOB]

I have tons of info and parameters to tinker with but here is the lowdown on tune #1:

Eliminated the speed limit that the TB could open in 1st gear
Lowered PE delay from 5000 to 2500rpm
Eliminated speed limiter (actually set it for 150)
TCM commanded TM disabled
Brake stall rpm eliminated (it was 1500 rpm)
slightly raised 1-2 shift points under light throttle
Reduced shift time "normal" (non-TH mode) adder by 50% on all upshifts

The tune that I am looking at is a lot more radical than the changes that I made.  This is a baby step.

I haven't touched the line pressures or the engine TM yet.  I'm going to load it in the truck at lunch and take it for a spin.  Anyone have any thoughts on this step or any others that I might should do?

[Main One]

Looks like a good start to me!

[Alaska_AV]

Good luck   

[KY_BOB]

OMG!!!  I've created a monster!

I flashed it at the office and drove it home for lunch.  The shifts in town were noticeably firmer but not annoying.  On the way out of town, I punched it from about 10mph, it down shifted to 1st and the back tires screamed for 10-15'.  I got traction before the 1-2 shift.  When it hit 2nd the back tires screamed again, I don't mean chirped, it spun them enough that it wheel hopped.  WOT 2-3 and 3-4 shifts felt like it had a shift kit in it.  I also tried a stalled launch, it will now launch spinning the back tires even with T/C on (I forgot to turn it off)

It's down right scary what my "mild" removal of TM and shortening shift times did. 

[Main One]

OMG!!!  I've created a monster!

I flashed it at the office and drove it home for lunch.  The shifts in town were noticeably firmer but not annoying.  On the way out of town, I punched it from about 10mph, it down shifted to 1st and the back tires screamed for 10-15'.  I got traction before the 1-2 shift.  When it hit 2nd the back tires screamed again, I don't mean chirped, it spun them enough that it wheel hopped.  WOT 2-3 and 3-4 shifts felt like it had a shift kit in it.  I also tried a stalled launch, it will now launch spinning the back tires even with T/C on (I forgot to turn it off)

It's down right scary what my "mild" removal of TM and shortening shift times did.

Sounds like your little tuning business is going to be continuing.