Launch Control - Am I doing it wrong?

[WattTurbo]

Looked up the conditions in ASG out of interest:
* Steering straight
* Hard on the brake (there's a minimum brake pressure, which is pretty high)
* Throttle >99%
* Car stationary
* Gearbox oil temperature between 10C and 100C
* Gearbox clutch temperature between 8C and 200C

And then you also have the release conditions in the BMS, which is battery temperature and state of charge.

So if we have a tune and can do a virtual LC at will when those conditions have not been met, specifically the gearbox and battery temps, then we could potentially harm those components?

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[Sly_North]

As I am aware you might need Sport Chrono to have Launch Control.

No, most P. cars have a Launch Control even without having the Sport Chrono Pack (Sport+). The dash won't show the launch message, but it will do it, not fighting against the brakes.

Example on a Macan SD without SCP :

 

[whitex]

If the car had no LC capability, shouldn't pressing both brake and accelerator simultaneously show some kind of an error message? I think I remember seeing one on a Lexus once (it had no launch modes).

 

[Sly_North]

If the car had no LC capability, shouldn't pressing both brake and accelerator simultaneously show some kind of an error message? I think I remember seeing one on a Lexus once (it had no launch modes).

On most cars without LC, one will feel the car trying to push trough its brakes.
If there's a launch mode on an ICE, the revs will rise and stay at whatever the car maker chose, while the clutch stays disengaged. On either ICE or EV, the car won't shake, there won't be an engine vs brakes fight.

 

[prj]

So if we have a tune and can do a virtual LC at will when those conditions have not been met, specifically the gearbox and battery temps, then we could potentially harm those components?

The ASG tune can never override what the BMS allows.
If you have a low or high battery temperature, then the BMS will limit the output.
The gearbox temperature is not relevant from a torque handling capability, nor will any damage occur as a result. It does not matter if you have more or less power. I'd say it's mostly a leftover from ICE logic, I did not check the activation bits of whether that is active in the ASG or not.

That’s the nature of tuning, allow engines or in this case EVs to work outside some manufacturer parameters..

Tuning the ASG does not allow the car to work outside manufacturer parameters.
The authority on motor and battery protection are the inverter controllers and the BMS. The ASG has no authority. It can request torque and power that could turn the moon, but it is exactly the same as you entering the bank and requesting to withdraw a trillion dollars. If it is not in your account, then you're not getting it.

The power limit in the ASG is purely for commercial purposes and for having a consistent power output from 30-100% SoC. In fact that is Porsche's marketing, that they do not lose power output. You can give up some of the consistency to have the maximum safe output all the time.

 

[prj]

Hey, don’t take it so personal..I don’t think Porsche sells more car because of a more hp boost on LC marketing..these days people wants high numbers and always available, not only with LC..so, if Porsche doesn’t allow this, it means something can’t cope with that power.. wether they say or not, that certain power is only available with certain temperatures etc doesn’t change that tuning the car may create problems not covered under warranty..

More misinformation.
Porsche's marketing is to not be like Tesla, which derates the powertrain already below 90% SoC, and only shows the very peak numbers.
This is the reason for the limits in the ASG. That, and so they can sell the same cars for a higher price with just a software change. Taken to the extreme on J1.2 where all the 4WD cars below the Turbo S have the same power capability.

It is purely a marketing decision. And then the launch numbers are shown so that the power is not too far behind Tesla from an uninformed glance.

Don't tune your car if you don't want to, but don't spread FUD. The car can can have all the power available all the time, and derate just like Tesla does, there is no problem with that. Tuning the ASG does not take it out of factory safety parameters.

 

[prj]

I’m not interested in more power, I just buy what I need and don’t modify cars because can’t buy the next step in power

What exactly is the "next step" from a J1.1 Turbo S or a J1.2 Turbo GT? Do tell.
Why are you driving a 4S and not a Turbo GT?

but ok then, if the car can have always more power, why you don’t become official tuner?! Or why they don’t suggest you if someone wants more power?!

What is an "official tuner"? Something you just made up on the spot.

but it needs to be clear that in a car with already different problems, a tune won’t help for sure. That’s it.

What different problems? Who suggested that a tune fixes anything?

You said that unlocking the launch power damages components. I explained why that is not the case. I also explained why the power is limited (no, it's not because of component limits!).
This information is widely found in Porsche's own marketing materials. It's also why the J1.2's have Push to Pass from a button that can be activated an infinite amount of times without cooldown. Because it does not damage anything.

You are completely wrong in your statements, and now you're just going on in circles and getting personal.

Selling exactly the same cars with different power limits has been done for decades. Just look at Mercedes or VW commercial vehicle offerings, e.g. the VW Caddy which from 75hp to 140hp for the longest time did not have a single difference in it's mechanical parts.

 

[prj]

Oh and just in case - there's still protection for gearbox oil and clutch temperatures in the ASG of course, and the power is gradually derated/faded back in as you get closer or further from the limits.
The reason for launch lockout, is that launch is pointless past a certain point, as you would not get more power when the maximum output is being derated anyway. That's why it does not even enter launch mode.
When the ASG is tuned, nobody is of course changing the thermal protection envelope, so the power gets reduced exactly the same way as stock. If the gearbox is very hot/cold you would not get any more power, just as if the battery is hot or cold.

Only the commercial limitations are modified, the inverter, motor, battery, gearbox and differential protections all remain as-is and fully operational.

 

[W1NGE]

As I am aware you might need Sport Chrono to have Launch Control.

You don't!

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