Abuse mode is one more function but it is only for those with an automatic transmission. Since it has electronic controls that a manual does not the ECM can control when the torque convertor is locked or not

You do not need to remove TM, I had my tuner "adjust" it on both my C5 and C6 Z06s and they both pull much harder and smoother but still allows a safety trigger if TM is needed

 

Had to do the same, interesting results. In default launch sucks and subsequent shifts. Comp mode rubber in three gears no bogg. Launch in comp mode with steering wheel turned about 10 degrees, yep sucks launch killed but not as dramatic as a bogg just like pulling something. Tried around a long sweeper and in default as usual no go but in comp mode as soon a turn of any degree it was like throwing an anchor out. With everything turned off car smoked tires no mater what I did with steering wheel or any angle of forward motion. Summation, Comp works fine as long as car is going straight and with everything off all hell breaks loose. From this I see no difference in the Forum’s definition of TM and AH.

 

You really need to get a ECM scanner and record a launch and you'd see that something is being taken away from the car
Here I did a easy launch and then hammered it for 3 gears.
You see RPMs, time, HP and torque and when HP/torque went to negative values (TM) and the time it took to recover of about 4 tenths of a second added to the shift time !
The less horspower the car has the less effect TM has but without tuning TM and having added more horsepower/torque the more TM plays a part since it then excceds GM's stock settings as when TM is triggered.

 

Curious is this desktop image generated by the ECM or the Scanner software. Also curious as to torque numbers since torque is a measured force, where might one find the measurement transducers that provide that data to the ECM for processing?

 

Very interesting. With your scanner - can you turn off TM and run the same graph to see what it does then?

Thanks for posting

 

This is the ECM sending out all its values to OBD scanner which is record mode. There has been a ton of threads on this subject so do a search but several sensors are used by the ECM to calculate torque as in part, yaw, wheel, MAF and MAP sensors along with RPM and engine load so torque is measured and computed which can be compared when on a dyno.
If you look at the graph you notice torque dropping around 5252 RPMs as you's see on a chassis dyno

 

monitors the following sensors and engine parameters to calculate engine output torque.

- Air/Fuel ratio
- Mass Air Flow (MAF)
- Manifold Absolute Pressure (MAP)
- Intake Air Temperature (IAT)
- Spark Advance
- Engine Speed
- Engine Coolant Temperature (ECT)
- A/C Clutch Status

Ranger

 

Very interesting. Not sure if it proves that there is TM present. If you take .4 seconds to make a shift, wouldn't the graph look exactly like you have even without TM?

 

Now after my tuner did his magic you see a hard pull to 120 MPH and just under 7,000 RPMs.
Hard wheel spin off the line and then HP and torque never drop to negative values until I got off gas pedal so TM exists can can be tuned without turning it off

 

Look at the elpased time, manual shifts take around 4 tenths yet the timespan at negative torque is longer then that

 

I understand what you are saying, but I also think that the graph has a credibility issue given that the shift does take place, and there is no way to know exactly how fast the shift really did take, don't you think?

 

Schindler, get some sticky tires and you will feel the TM on 1-2 shifts and 2-3 shifts. In my C6 with stock tires , you do not feel it at all.
When I went to Toyo RA1 305.35.18 on CCW 18X11 wheels it is clearly there and is easy to feel when you shift fast.

 

But of course, the world must be flat, because the pseudo-engineers continue to "have doubts."

Members can lay out what the Frinking service manual says about Torque Management. Back it up by
(1) the tuning software metrics
(2) GM HiTech Performance article on tuning out TM
(3) countless affirmations by experienced drag racers
(4) many tuners who help owners turn-off TM and achieve improved acceleration.
(5) now the graphics by boosted_Z06

Is that enough evidence....?

Of course not. To them, the world is still flat and will always be flat....Until someone finally produces credible evidence that it's not. They will go to the grave in the dug-in position that TM is a myth.

My last post. When I figure out the technique for driving around TM, I won't be posting it here.

Ranger

 

The ECM data has no credibility,
It has been common knowledge for manual shifts to take 3-4 tenths so it is real simple to see the elapsed time that it took for engine to get back to the HP/tq was before the shift and the second graph of ECM data shows what happens when TM is tuned and engine then pulls like a bull between gears with no torque loss.

I suggest you look at the ECM tables and see what the torque setting values are and there is not a table called UPSHIFTs for nothing but for me I'll take what happens in the 2nd graph for drag racing anytime.

 

Ranger we have said enough to teach them how to drive around it. Some people know everything and can learn nothing.

 

I suspect those after all these years since the 1997 C5 having TM do not think this exists is because they either do not hard launch or shift at high revs or have mostly stock engine so they are not getting to the upper limits where the TM would be commanded on.
It is simple though since the rated flywheel torque is higher then the rated input of the transmission that GM and other carmakers would reduce shock/stress with a simple circuit that pulls timing.

Even a airbag needs some stress trip function to know when to open and yaw sensor under passenger seat with all 4 wheels having sensors and still people find some excuse to ignore the data but will trust a $130 Gtech stuck on a windshield of what torque output is

 

First of all, ya'll need to understand that my comments are not designed to "prove" that TM does not exist. My comments are simply playing the devils advocate to the PROOF that ya'll are trying to offer. Please don't flame me or anyone else for questioning the data that ya'll are presenting. We have just as much right to debate this issue as you do.

As to the above acertation. You say it's well known that it takes .4 seconds to shift. Certainly you can agree that a shift can take longer than that, right? I didn't imply that the "ECU has no creditility", I questioned how you can be sure that the time on your chart is not just the time it took to shift. I'm not saying its not so, I'm just saying that there is no proof of it.

Stickier tires? Sure, they can cause an engine to "bog" right?

Don't shift or launch hard enough? Even Ranger admits that its mainly a problem at the drag strip and on drag radials.

Again, let me repeat (because some people insist on questioning my and others stance). I don't dissagree that timing may be pulled under certain "events". But I have launched plenty hard, and shifted extremely hard. What I don't feel - not even remotely - is the "falling on its face" that others report. In fact, I can assure you that my car shifts very hard - there is no softness at all to the hit when I bang the gears.

If it makes ya'll feel any better, I'll go ahead and concede that TM does exist in some form or fashion. Just not what many people say they feel.

 

Please provide a cite of where I made that statement.

Ranger

 

Dennis, you took what you referred to as a good natured shot at me yesterday, so let me return the favor. Your C6 has an automatic transmission right? How can you think you know what I'm describing on the TWO C6's with manual transmissions that I've owned? I'm simply relating the experiences I've had with my car compared to what some people are describing.

At least I can say that I now have 10,000 miles of experience with manual transmissions C6's to go by. How about you?

 

Well, I'm going by memory. I'm not trying to say that you are saying that TM does not exist with street tires, but I thought I've read that you have said that it has been a much greater problem with drag radials.

I'm not trying to put words in your mouth, or discredit you. I sincerly apologize if I have misundertood your comments.