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Part 4: The J1.2 Powertrain

prj

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1. Introduction

This is a post in a series, which will shed more light on some of the inner workings of the Taycan.
You can find Parts 1, 2 & 3 here:
Part 1: MapEV Diag
Part 2: The J1 Powertrain
Part 3: The Quest for the Perfect Tune

2. Getting started
For more in-depth information about the general architecture, please refer to Part 2. This is mostly a continuation of Part 2 with the J1.2 data.
Some power curves are still missing, notably the Turbo GT. I will add them as soon as I get the change to log the cars.
All the charts are taken from our new website: www.mapev.net
NB! Please note that all the maximum curves assume the MapEV launch control patch or launch control mode. Without it, the torque and power is lower.

3. Motor/Inverters
For the J1.2 there is a huge change. The change is that a small rear motor no longer exists. This means that all the 4WD models with PB+ apart from the top three (Turbo S, Turbo GT, RS e-tron GT Performance) have exactly the same hardware, and the same power potential.
We have now demonstrated that by tuning a 4S from 598 PS to 940 PS and posting a 100-200 time of 4.99s. Stock it did 9.44s.
The Turbo GT runs flat out in launch control, the rest are limited.
Unlike on the J1.1 launch control not only gives additional peak torque, it actually gives more torque throughout the band and for longer.

3.1. Rear Motor/Inverter - All except Taycan GT
The maximum torque in normal mode is 585 Nm. With launch control activated the maximum torque is 688 Nm. The launch torque has seen a large boost compared to J1.1. From 60Nm to 103 Nm.
Porsche Taycan Part 4: The J1.2 Powertrain fl_rwd_h


3.2. Rear Motor/Inverter - Taycan GT
The maximum torque in normal mode is 830 Nm. In launch mode there is 3 Nm more, which is 833 Nm.

Porsche Taycan Part 4: The J1.2 Powertrain fl_rearbig


Additionally, only on the Turbo GT the gearing is 24.9% longer. So when the other variants have 16000 rpm (270km/h indicated), the Turbo GT only has 12000 RPM on the rear motor.

3.3. Front motor/Inverter - All except Taycan GT, Taycan Turbo S, Audi RS e-tron GT Performance (and RWD variants).
300Nm torque, no launch mode.
Porsche Taycan Part 4: The J1.2 Powertrain fl_frontsmall


3.4. Front motor - Taycan Turbo GT, Taycan Turbo S, Audi RS-etron GT Performance
400Nm torque in normal mode, 470Nm torque in launch mode and more output in general than on J1.1.
Porsche Taycan Part 4: The J1.2 Powertrain fl_frontbig


4. Graphs for individual models.
4.1.
Porsche Taycan Turbo GT - max 1170 PS / 1300 Nm
Porsche Taycan Part 4: The J1.2 Powertrain turbogt_h

Porsche Taycan Part 4: The J1.2 Powertrain turbogt_1st


4.2. Porsche Taycan Turbo S - max 1080 PS / 1160 Nm

Porsche Taycan Part 4: The J1.2 Powertrain fl_turbos_h

Porsche Taycan Part 4: The J1.2 Powertrain fl_turbos_1st

4.3 Porsche Taycan Turbo - max 940 PS / 990 Nm
Porsche Taycan Part 4: The J1.2 Powertrain fl_4spbplus_h

Porsche Taycan Part 4: The J1.2 Powertrain fl_turbo_1st


4.4 Porsche Taycan GTS - max 940 PS / 990 Nm
Porsche Taycan Part 4: The J1.2 Powertrain fl_4spbplus_h

Porsche Taycan Part 4: The J1.2 Powertrain fl_gts_1st


4.5 Porsche Taycan 4S PB+ - max 940 PS / 990 Nm
Porsche Taycan Part 4: The J1.2 Powertrain fl_4spbplus_h

Porsche Taycan Part 4: The J1.2 Powertrain fl_4spbplus_1st


4.6. Porsche Taycan 4S PB - max TBC PS / 990 Nm
Coming soon

4.7. Porsche Taycan 4 PB+ - max 940 PS / 990 Nm
Porsche Taycan Part 4: The J1.2 Powertrain fl_4spbplus_h

Porsche Taycan Part 4: The J1.2 Powertrain fl_4pbplus_1st


4.8. Porsche Taycan 4 PB - max TBC PS / 990 Nm
Coming soon

4.9. Porsche Taycan Base (RWD) PB+ - max 670 PS / 690 Nm
Porsche Taycan Part 4: The J1.2 Powertrain fl_rwd_h

Porsche Taycan Part 4: The J1.2 Powertrain fl_rwdpbplus_1st


4.10. Porsche Taycan Base (RWD) PB - max 670 PS / 690 Nm
Porsche Taycan Part 4: The J1.2 Powertrain fl_rwd_h

Porsche Taycan Part 4: The J1.2 Powertrain fl_rwdpb_1st


4.11. S Audi e-tron GT - max 940 PS / 990 Nm
Porsche Taycan Part 4: The J1.2 Powertrain fl_4spbplus_h

Porsche Taycan Part 4: The J1.2 Powertrain fl_etrongt_1st


4.12. RS Audi e-tron GT - max 940 PS / 990 Nm
Porsche Taycan Part 4: The J1.2 Powertrain fl_4spbplus_h

Porsche Taycan Part 4: The J1.2 Powertrain fl_etrongtrs_1st


4.13. RS Audi e-tron GT Performance - max 1080 PS / 1160 Nm
Porsche Taycan Part 4: The J1.2 Powertrain fl_turbos_h

Porsche Taycan Part 4: The J1.2 Powertrain fl_etrongtrsperf_1st


5. Summary
If the J1.1 had a lot of tuning potential, then the J1.2 is off the scale. On the Taycan 4 PB+ you can gain more hp than it has stock.
My best guess is Porsche saw that manufacturing two separate motors makes no financial sense, and just went to the PPE rear motor for all the variants.
They then created a plethora of different power variants, in many cases just through software tuning.
Another very noteworthy development is that J1.2 holds the power at the top end much better. A J1.1 Turbo had a 800hp peak at 100km/h and at 200km/h you had 700hp left. The J1.2 Turbo still pumps out over 900hp at 200km/h. This is why they are over a second quicker 100-200.

Finally wheel torque wise the RS Performance and the Turbo S make more torque in first gear than the Turbo GT. After tuning They will be faster or as fast 0-100 km/h. Of course the Weissach is way faster because it weighs much less.

Meaning when comparing tuned variants the Turbo GT is only objectively faster at speeds over 100km/h and only at high SoC. And of course the Turbo GT has a significantly higher top speed due to the different gearing.
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Even more software marketing by VAG

Etron GT S is the biggest bargain
For 2026 they now have an Etron-GT :)
Limited to 245km/h and even cheaper. And unlike Porsche they don't lock Active Ride (On Porsche you can't get Active ride on the 4, you have to get the 4S).

I specced a fully loaded GTS (4S is the same price) and an Audi, and the price difference is 46000 euro.
The Audi is also more aerodynamic so it's gonna be faster.
 
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From what I understand, the Turbo GT 900amp inverter was developed In-House by Porsche, uses ROHM SiC MOSFETs compared to the Hitachi IGBT inverter used in the Taycan.

You discovered the Turbo GT has the 18,500prm rear motor compared the 16,000rpm PPE rear of the other J1.2 variants

You are also saying the Turbo GT could use a different BMS to get more out of the battery pack?
 
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From what I understand, the Turbo GT 900amp inverter was developed In-House by Porsche, uses ROHM SiC MOSFETs compared to the Hitachi IGBT inverter used in the Taycan.

You discovered the Turbo GT has the 18,500prm rear motor companred the 16,000rpm PPE rear of the other J1.2 variants

You are also saying the Turbo GT could use a differnt BMS to get more out of the battery pack?
I am not sure tbh. It might be higher invcon limits. Battery pack even on J1.1 can give more current than what the inverter controllers are programmed to do. Will know once we log a GT.
 


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Porsche lied.

The Taycan GT does not make 1033 PS in launch control.
It makes 1170 PS already stock. Increasing beyond that is not possible, since it's already unlimited from factory just as the J1.1 Turbo S was.

All other modes are correct. And the power can be increased to 1170 PS in all modes.

Rear inverter has base torque limit of 830 Nm and when the launch bit is set, it gets to... wait for it... 833 Nm. Yep, 3 Nm more maximum torque.
The front inverter though (and I suspect that is the same case for the Turbo S) has 70Nm more in launch mode instead of 40Nm like on the J1.1. So 400 base (unchanged from pre-FL), but 470 Nm in launch.

This means a total possible launch torque for the Turbo GT of 1303 Nm and the Turbo S of 1158 Nm.

Will plot the charts and update the data on the website, since the first Weissach has been logged and tuned now.
Should hopefully get my hands on a Turbo S soon as well (or an RS Performance), and get the actual data from that as well.
 
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LLM

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Just to clarify, given that the Quattro isn’t included in the MapEV website, is the current Quattro now also based on the J1.2 platform like the S and RS ?
So with the MapEV update, all variants now have the same power output (apart for the Performance) ?
 
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Just to clarify, given that the Quattro isn’t included in the MapEV website, is the current Quattro now also based on the J1.2 platform like the S and RS ?
So with the MapEV update, all variants now have the same power output (apart for the Performance) ?
Yes, it's the same. All the AWD powertrains with the large battery are exactly the same, apart from the RS Performance, Turbo S and Turbo GT.
Need ID from it to add it to website, because I don't know which file it has atm.
You can use MapEV Diag to upload the ID to the server.

I also have actual measured data for the Turbo S and Turbo GT now, going to modify the first post with that.
 
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Added:
1. "Big" front motor graph.
2. "Big" rear motor graph.
3. Turbo GT actual data.
4. Turbo S actual data.
5. RS e-tron GT Performance actual data.
6. GTS 1st gear data.
7. Information about the Turbo GT gear ratios.
 
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With your software development, Would it be possible to upgrade the front motor of a J1.2 Turbo S with same rear motor?
 
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With your software development, Would it be possible to upgrade the front motor of a J1.2 Turbo S with same rear motor?
No... We do not do anything with inverter controllers. And if I read what you wrote correctly it's physically impossible.
 

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The 1170ps for the Turbo GT, at what SOC does that drop off.? I recall for the J1.1 Turbo, the 800hp figure was only at 100% SOC
 
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The 1170ps for the Turbo GT, at what SOC does that drop off.? I recall for the J1.1 Turbo, the 800hp figure was only at 100% SOC
Pretty much immediately. That's at 100% SoC.
The curve/rate at which it drops off is much less than J1.1 though.

At 80% you're not getting over 1100 PS anymore though iirc.

If you want to test/log that on your car you can though ;)
 

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Pretty much immediately. That's at 100% SoC.
The curve/rate at which it drops off is much less than J1.1 though.

At 80% you're not getting over 1100 PS anymore though iirc.

If you want to test/log that on your car you can though ;)
Once I install the ASG, we will work together on that.
 

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Knowing that it’s impossible to exceed the stock 640 Nm without the Prj fix who add only 20Nm, I don’t understand how Shiftech can claim to produce that much torque…

Porsche Taycan Part 4: The J1.2 Powertrain IMG_1781
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