Part 3: The Quest for the Perfect Tune

[BjörnfromHamburg]

That's a completely new topic in Taycan tuning and for sure interesting to me and many.
I started to use the steering wheel button more lately on the Autobahn depending on the density of traffic (when not using Innodrive).
It's a nice control add-on for the driving experience.

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[Dee]

9. ASG removal video

A lot of you have asked what the ASG swap looks like. Since I am going to sell this commercially, I have made an instructional video with a voiceover.
I'm not a super editor, and my buddy is not a pro videographer, but I think it turned out quite alright.

There is a vid on Redshift performance website for removing the ASG on a sedan.
https://www.redshift-performance.com/taycan-ecu-removal

 

[BjörnfromHamburg]

There is a vid on Redshift performance website for removing the ASG on a sedan.
https://www.redshift-performance.com/taycan-ecu-removal

I recommend PRJ's video, as it's much better describing important details and the chronology of steps.
Been there, done that.

 

[Dee]

I recommend PRJ's video, as it's much better describing important details and the chronology of steps.
Been there, done that.

But that's a CT/ST, not a sedan.
That's why I posted this.
Been there, done that as well.

 

[prj]

But that's a CT/ST, not a sedan.
That's why I posted this.
Been there, done that as well.

In case of the sedan you just don't do the things in the brackets.
I mean if it's really needed I can film another video, but it's literally exactly the same, just easier.

The liner is flexible and you don't have to worry about removing the speaker grille, screws, light wire etc, you just need to remove the hooks, the bottom covers and the lip cover, and that's it.

I guess there's the tiny bit of trim around the tailgate that's different, that's the only difference.
I'll film a sedan video, just been busy. The good news is I got my car back, it has a 4y Approved warranty now and I can run all kind of Tests on Friday.

 

[prj]

Tested regen stuff today, everything works as described above.
It is possible to double or triple the regen. I tested 2.5x and it worked as expected.

However, the whole situation is not ideal, because the end pedal travel that controls the regen is very small. So you would have to do something more similar to one pedal driving cars, where there is more overall throttle control over the regen.

Additionally, because the antisurge damper is calibrated for a tiny amount of regen torque (~50Nm), then when you do sudden on/off throttle transitions it's very uncomfortable, as the engine braking comes in very fast. Couple that together with the fact that you have ~1cm of pedal to control the whole regen area, and it's not great.
Have to re-calibrate a lot of logic there (pedal mapping, torque filtering), rather than slap a % increase on the map to have a good result.

That said, adding e.g. 30-40% works alright, but IMO 30% is barely noticeable... I mean you're going from like 50Nm on powertrain to 65-70Nm, of course it's not really noticeable.

 

[Dee]

In case of the sedan you just don't do the things in the brackets.
I mean if it's really needed I can film another video, but it's literally exactly the same, just easier.

The liner is flexible and you don't have to worry about removing the speaker grille, screws, light wire etc, you just need to remove the hooks, the bottom covers and the lip cover, and that's it.

I guess there's the tiny bit of trim around the tailgate that's different, that's the only difference.
I'll film a sedan video, just been busy. The good news is I got my car back, it has a 4y Approved warranty now and I can run all kind of Tests on Friday.

It was not meant as criticism but as a guide to where you can find the procedure for a sedan.

Did I mention you do absolutely great work?

 

[Porsche-Guru]

Tested regen stuff today, everything works as described above.
It is possible to double or triple the regen. I tested 2.5x and it worked as expected.

However, the whole situation is not ideal, because the end pedal travel that controls the regen is very small. So you would have to do something more similar to one pedal driving cars, where there is more overall throttle control over the regen.

Additionally, because the antisurge damper is calibrated for a tiny amount of regen torque (~50Nm), then when you do sudden on/off throttle transitions it's very uncomfortable, as the engine braking comes in very fast. Couple that together with the fact that you have ~1cm of pedal to control the whole regen area, and it's not great.
Have to re-calibrate a lot of logic there (pedal mapping, torque filtering), rather than slap a % increase on the map to have a good result.

That said, adding e.g. 30-40% works alright, but IMO 30% is barely noticeable... I mean you're going from like 50Nm on powertrain to 65-70Nm, of course it's not really noticeable.

I think the regen on the stock Taycan works a treat (and thankfully is not like a Tesla). The brake blend-in is likely the best that is out there….
Ain’t broke… don’t fix.

Others may have a different opinion about regen; and it is good to know that it’s `technically` configurable….

Thanks for your hard work.

 

[ze_shark]

Additionally, because the antisurge damper is calibrated for a tiny amount of regen torque (~50Nm), then when you do sudden on/off throttle transitions it's very uncomfortable, as the engine braking comes in very fast. Couple that together with the fact that you have ~1cm of pedal to control the whole regen area, and it's not great.
Have to re-calibrate a lot of logic there (pedal mapping, torque filtering), rather than slap a % increase on the map to have a good result.

That said, adding e.g. 30-40% works alright, but IMO 30% is barely noticeable... I mean you're going from like 50Nm on powertrain to 65-70Nm, of course it's not really noticeable.

50 Nm sounds unintuitive for a system designed to max at 0.4g of deceleration J1 ?
Or Do we have to multiply by 4 because it is torque per wheel ?

 

[chun]

50 Nm sounds unintuitive for a system designed to max at 0.4g of deceleration J1 ?
Or Do we have to multiply by 4 because it is torque per wheel ?

I assume it's 50 before you press the pedal; and once you press the pedal it increases the amount of regen.

 

[prj]

50 Nm sounds unintuitive for a system designed to max at 0.4g of deceleration J1 ?
Or Do we have to multiply by 4 because it is torque per wheel ?

I am talking about the miniscule regen torque when you turn the regeneration mode to ON on the steering wheel, and then release the accelerator pedal without pressing the brake, as that is what all the faff is about.

The brake regen is anyway limited by what the battery can accept and the motors provide. And of course it's over ten times higher.

 

[Chiu]

I have placed an order for a set for my Taycan RWD and look forward to its arrival.
Once I’ve finished the installation, I’ll be sure to share my driving impressions with everyone!
?????????

 

[Rik_CT4s]

I can't really measure 1/4, it's too cold here and my tyres don't work yet in this weather. We have around 6C. 100-200 is ok though.

That said, my car is waiting on some broken climate flap replacements atm with the center console disassembled, which might take longer than expected, in which case I might not be able to get to this until next Friday.

Did you get a chance to dragy your turbo S with the tune? V curious. Cheers

 

[prj]

Did you get a chance to dragy your turbo S with the tune? V curious. Cheers

Yes, I am just back from doing that.

The test was done with 85% SoC. Same road, same direction. Slope a tiny bit different because with stock it takes 60 meters more to reach the 200km/h.
Tests done in Sport Plus in both cases, flooring the car at 70kph.

Here is the stock:

And here the tuned:

With 100% SoC it can run 6.8x (I got that before, but I wanted to show the difference in exactly the same conditions back to back). Or if I go a bit downhill... but that's cheating.
Keep in mind, my car is by far the heaviest one - it is a Turbo S CT with absolutely every option ticked, even the rear seat entertainment. This also shows in the stock time though.

 

[prj]

Oh and reason why I said what I said in the other thread, here is a graph of a datalog from the ASG showing the power drawn from the battery vs the power output by the motors.

At 100km/h the difference is around 4.5%
At 200km/h it is 7%.

So if you look at the power graph, my Taycan made 788 PS.
If you take the actual power taken from the battery (reported to the ASG by the BMS), my Taycan suddenly made 830 PS.
And if you do stupid mental gymnastics, like multiplying amps and volts at peak values, well then my Taycan made over 900 PS.

Only one of these numbers is correct and can be compared to the factory value. And this is the 788 PS number. Everything else is misleading and not comparable. Stock the number is bang on 625 PS.

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