Transmission Control Unit (TCU) Update

[Oryan]

And I keep explaining to all you all what happened: The needle bounced well into the red zone, then immediately dropped below c. 5K RPM, and in a higher gear: I was in Manual Gate, i.e. shifting myself; yet the car took me out of manual, despite the shifter still being in manual gate. You say that over revving is impossible: I am telling you that I did it, but only for an instant. Are we talking about the same thing, just seeing it differently?

LOL! That I was, but only once.

You said that poorly: 99 out 100 of "us" do not drive performance cars. Now, if you mean 99 out of we Stinger drivers (many of whom already have sports/performance car experience), maybe you are right. But I know that @Paul32 (for one) doesn't want to shift for himself so probably doesn't care. Most people don't care for manual mode in the first place. The few of us who do shift for ourselves can use manual gate (or the Sport mode equivalent in shift by wire?); and then we don't have "D" showing up at annoying moments.

I like the nanny because I might forget again. (Senioritis) As long as I am driving the damn car and not standing it on its bloody ear I am fine; the nanny won't show up. You sound like you're advocating for the removal of a feature which can save the engine from your own mistake; just because a Ferrari does it that way.

I can assure you that you were nowhere near actually causing damage to the car. The indicated redline on the tach is lower than the ECU's rev limiter which will, at worst, bounce you off that point repeatedly and will be considerably below any mechanical design limitations of the engine itself. It won't let you break it. Nobody is making any mention of removing that. What's being discussed is the ECU actively upshifting before that point while in manual mode prior to it.

 

[MerlintheMad]

I can assure you that you were nowhere near actually causing damage to the car. The indicated redline on the tach is lower than the ECU's rev limiter which will, at worst, bounce you off that point repeatedly and will be considerably below any mechanical design limitations of the engine itself. It won't let you break it. Nobody is making any mention of removing that. What's being discussed is the ECU actively upshifting before that point while in manual mode prior to it.

@Marc Collins said that too, above. I did not know that. I thought that red line is "red line". I am glad to learn that the actual engine killing RPM level is above 7K RPM or higher. Thanks, guys.

And you have made this subject clear here: I also didn't realize that the proposed/feared change would upshift "for me" even when I am in manual gate. That only happened when the needle bounced into the red. But It probably doesn't matter anyway, since I upshift manually at c. 4,500 RPM, the upper end of optimum torque. Anything over that is just excess noise and wasted energy. Also, the shifts come later which just increases the inefficiency. There is absolutely no reason (beyond noisily showing off) to shift any higher than 5K RPM.

 

[Oryan]

And you have made this subject clear here: I also didn't realize that the proposed/feared change would upshift "for me" even when I am in manual gate. That only happened when the needle bounced into the red. But It probably doesn't matter anyway, since I upshift manually at c. 4,500 RPM, the upper end of optimum torque. Anything over that is just excess noise and wasted energy. Also, the shifts come later which just increases the inefficiency. There is absolutely no reason (beyond noisily showing off) to shift any higher than 5K RPM.

Gonna have to disagree here. Yes, peak torque starts to drop off after 5k but at that point, what matters is horsepower as far as what keeps the car accelerating at the maximum rate. Horsepower is a function of torque and RPM. So long as torque doesnt drop off like a rock, HP will at least remain at or near its peak meaning there's still reason to stay in that gear longer. IMO at least on a stock car you could rev out to about 6k and modded ones, and especially once people start fiddling with the turbos, will want to not only run all the way to redline, the idea of trying to raise it and find out how much margin Kia left above it comes to the table. That doesn't even take into account the effect of torque multiplication that the lower, shorter gear would have.

 

[Fl stingergt]

Ya tork Motorsports in Washington state has program ecu tcu pcu

 

[Fl stingergt]

Your max hp is around 6100 6200 rpm though. Torque gets u moving hp Sustains car moving forward.thats why torque dies and hp rises at upper rpm.

 

[MerlintheMad]

Your max hp is around 6100 6200 rpm though. Torque gets u moving hp Sustains car moving forward.thats why torque dies and hp rises at upper rpm.

Well, that certainly describes what I have felt: the car just keeps on giving in 7th gear (the only one I used). The pull was satisfying, and would probably have been even more so, had I downshifted to 6th or even 5th gear: but in my noobishness, I wanted to stay far away from the red line (after my stupid botch of the first launch control scared me).

 

[Fl stingergt]

Don’t worry I’ve hit rev limiter a dozen times. The engine will shut fuel down and retard timing quickly to save engine. Scared me the first time to.

 

[Marc Collins]

Ya tork Motorsports in Washington state has program ecu tcu pcu

Links? I'm not aware of any control unit-related mods for the Stinger besides external tuner boxes for the turbos, which of course do not directly alter or replace any control unit programming.

 

[Fl stingergt]

His web sit is damfastdd.com look on YouTube at tork Motorsports he has a lot of good videos on stinger mods and how to videos. He does ecu tunes not a piggy back must send ecu to them

 

[Oryan]

Tork tunes the ECU, yes. John's mentioned trying to get to the TCU but I've seen nothing that says they're now able to actually tune the TCU or any other control modules so far.

 

[Fl stingergt]

His last update was July so who knows. Someone will get into it sooner or later.i know he’s been working on it .

 

[Dennis]

Torque is inversely proportionate to HP. Toraue helps off the line while HP will give you sustain pull at the higher end. Thats where petrol engine benefits and start hauling from Diesel engines. Dont drive it like a Diesel engine. start shifting at around 6 to 6.2k rpm will reap most benefit from this engine.

 

[Marc Collins]

Torque is inversely proportionate to HP. Toraue helps off the line while HP will give you sustain pull at the higher end. Thats where petrol engine benefits and start hauling from Diesel engines. Dont drive it like a Diesel engine. start shifting at around 6 to 6.2k rpm will reap most benefit from this engine.

HP is a function of torque...a simple calculation...look it up.

Can we keep this thread on topic?

 

[upsidedown]

Now all I need is to have this update available for my DBW shifter

 

[Dennis]

HP is a function of torque...a simple calculation...look it up.

Can we keep this thread on topic?

What I meant is the Torque will reach peak and plateau while horsepower will increase. All Dyno graph will show similar reaults.

https://www.quora.com/Why-is-it-tha...hing-a-peak-even-though-the-RPM-is-increasing

 

[Marc Collins]

What I meant is the Torque will reach peak and plateau while horsepower will increase. All Dyno graph will show similar reaults.

https://www.quora.com/Why-is-it-tha...hing-a-peak-even-though-the-RPM-is-increasing

Start shifting at 6,000-6,200 rpm is not useful advice unless you are in a drag race or towing a trailer up a mountain. The car shifts itself quite appropriately most of the time, including when using full throttle. The engine is torque-rich, meaning you rarely have to rev the snot out of it to get the acceleration needed, unlike a high-revving low-torque engine (classic rice racer).

What does this have to do with the TCU update? It is only going to affect non-wide open throttle shift points.

 

[MerlintheMad]

I made the personal discovery yesterday that if you are not in Sport mode, and you move the shifter to manual gate, and race off from "poll position" as the light turns green, and your foot is completely down (even to the point of the "click") that the TCU ignores manual altogether and takes over shifting for you. I have not done this floor to the "click" with Sport mode; so I don't know if it ignores manual gate in Sport also.

But from what I've read here and elsewhere, complaining that the trans in the Stinger is not programmed to be worthy of a true sports car (I know, it isn't a "sports car" it's a gran turismo), I'm guessing that now that I have grown accustomed to my Stinger experience enough to push the accelerator hard (to the "click"), that I have only just barely found out what all you all are talking about: and even Sport mode is not immune from the car just taking over all the shifting if you floor it hard enough and long enough.

 

[Marc Collins]

I made the personal discovery yesterday that if you are not in Sport mode, and you move the shifter to manual gate, and race off from "poll position" as the light turns green, and your foot is completely down (even to the point of the "click") that the TCU ignores manual altogether and takes over shifting for you. I have not done this floor to the "click" with Sport mode; so I don't know if it ignores manual gate in Sport also.

But from what I've read here and elsewhere, complaining that the trans in the Stinger is not programmed to be worthy of a true sports car (I know, it isn't a "sports car" it's a gran turismo), I'm guessing that now that I have grown accustomed to my Stinger experience enough to push the accelerator hard (to the "click"), that I have only just barely found out what all you all are talking about: and even Sport mode is not immune from the car just taking over all the shifting if you floor it hard enough and long enough.

What discovery? It does the same thing in Sport mode unless you have disabled TC. Did you think it wouldn't auto shift in Comfort or Eco when it does in Sport? You have been participating in all the discussions about this, so...?!?!?

 

[Fl stingergt]

I don’t know if the shift by wire cars are set up differently. The gt1 are the strangest of the three . You step up from gt but know lsd rearend. They should have all been shift by cable with lsd it’s a gt car. I’ve noticed that the plain gt rwd is the fastest of the bunch. Even though the all wheel drives have 2 pounds more boost per turbo for extra weight I guess. But also I think the shift by cable for some reason is a little better set up.

 

[Fl stingergt]

I can turn Tc off and put in manual mode and In sport and hold every gear to the car hits rev limiter and shuts car down. I don’t know if some of the others do this gt1 gt2 awd. If anybody can write back with there Experiences .for these cars being gt they all have little differences in power train set up.some people got burned with the 18 inch tire awd only going to 155 mph. Small thing but it would bother me aliitte