Stage 1 Skoda Octavia RS 2.0 TSI: the full story, from the first question to 320 HP on the dyno

The best case studies do not start with the result, but with the customer's question. This is our case study of a Stage 1 Octavia RS in Brasov, documented from start to finish, with all the measurements published. This is the story of Florian and his Octavia RS 245 (2019, facelift, EA888 2.0 TSI DKTB engine, DQ381 gearbox), reconstructed from our actual correspondence with him, from the first email in April to the final calibration report in August. We are publishing it because it shows exactly how we approach a project: not from an arbitrarily chosen power figure, but from an honest discussion about what the customer wants and what his car actually allows, and from measurements at every step, not assumptions.

The first question: an IS38 turbo swap

Florian first wrote to us in April. The car already had a Racingline R600 intake, a turbo elbow and a turbo muffler delete fitted, and he was considering a much bigger step: replacing the original IS20 turbo with an IS38, plus a DO88 intercooler and charge pipe kit, while keeping the exhaust completely stock, with the OPF and catalytic converter, so that it stayed legal.

We gave him an honest answer: the configuration is possible, but it has to be looked at correctly. With a stock exhaust and the OPF retained, back pressure and exhaust gas temperatures remain the main limit, however large the turbo is. A realistic estimate for that package, IS38, an efficient intercooler, a good intake, but a stock exhaust, would have been somewhere around 340-360 HP and 480-520 Nm, not the "full Stage 3" figures you see on cars with an open exhaust. We recommended a conservative calibration, with controlled boost and EGT kept under control, rather than forcing the turbo for a bigger number on paper.

From a big upgrade to a more realistic plan

A month later, Florian came back with a different question: he no longer wanted the turbo swap, but an ECU+TCU remap on the existing configuration. Our estimate for the Octavia was 310-320 HP and 470-500 Nm, practically the target figures that would become, months later, the final result measured on the dyno.

We did, however, add an important technical observation: on this platform, the original intercooler is the main limiting factor, not the turbo. On other cars from the same family we had logged intake air temperatures (IAT) of up to 70°C, a value that cuts into both safety and power consistency, regardless of the software. We recommended he replace the intercooler before any serious remap.

The intake test: what a sport intake actually brings on stock software

Before any remap, we wanted to see separately how much the intake already fitted was bringing, so as not to mix the variables. So we tested the car on the dyno, on the same day, in three configurations, all on 100% stock software: the standard intake, the Racingline R600 intake with the airbox closed, and the same intake without its lid (open cone).

Power and torque at the wheel, measured on the Bapro dyno, for the 3 intake configurations, all on stock software.

The result: 249.7 HP / 402 Nm on the stock intake, 256.7 HP / 415 Nm with the airbox closed (the highest peak power) and 254.8 HP / 408 Nm without the lid (the best in the mid-range). A small but real gain, 5 to 7 HP, and the logs showed us why:

Air flow (MAF). The Racingline intake flows visibly more air at low to medium revs; towards the peak it evens out with stock. That is where the extra mid-range torque comes from.

Boost pressure has the same target in all three configurations and is followed closely. The gain does not come from boost, the intake does not "force" the engine, it only helps it breathe.

A note on accuracy, also visible in the logs: on the dyno, with the bonnet raised for the "no lid" run, the open cone picked up cooler air than in the closed airbox configuration, a condition specific to the dyno (bonnet up, fan), not to the real road, where an open cone draws hot air from the engine bay.

Intake air temperature (IAT) on the dyno. Note: the no-lid run was done with the bonnet open; on the road, with the bonnet closed, the open cone's temperature advantage disappears or reverses.

The Black Mamba intercooler: the result exceeded expectations

Florian chose the Black Mamba intercooler. The difference is a dramatic one and it shows in the intake air temperature logs:

IAT before and after the Black Mamba intercooler. Before, the temperature rose continuously with revs, up to 66°C towards 5,900 rpm. After, the only warm zone is the very start of the run, residual heat cleared within a few hundred rpm, and across the whole useful range IAT stays below 45°C, settling at around 40-42°C at high revs.

The real difference is not simply a lower peak temperature, it is a change in behaviour. Before, IAT rose continuously with revs: the original intercooler could no longer cope, and the engine was getting hotter and hotter air exactly where it needed it most. After the Black Mamba, the curve reversed: the temperature falls as the run progresses and stays stable up to the limiter. An engine that "breathes" air below 45°C, consistently, tolerates more boost and more advance safely, and that underpins the whole calibration that follows.

The final reference, after the intercooler

With the new intercooler fitted, we did a new reference measurement, still on stock software, so that we had the correct starting line for the remap: 267.3 HP at 5053 rpm and 403.0 Nm at 2253 rpm. Compared with the intake test in the summer, that is almost 11 HP more than the intake had brought on its own, consistent with what the chart above shows: an intercooler that keeps the air cool lets the engine "breathe" consistently, not just in the first few seconds of an acceleration.

Live calibration on the dyno: every run is logged and analysed before the next adjustment to the map.

What was changed under the bonnet: the engine map

Boost pressure was raised from approximately 1.3 bar (relative) on the stock software to approximately 1.56 bar on Stage 1. At the same time, the air-fuel mixture was enriched under high load, from a minimum lambda of 0.87 on stock to 0.81 on Stage 1, exactly as it should be done when you raise pressure and torque: more fuel relative to air, as a thermal safety margin.

The effect is also clearly visible in the exhaust gas temperature, EGT:

EGT before the catalytic converter, reference vs final Stage 1, measured on the same day on the same dyno. The peak fell from 946°C to 831°C, a better thermal margin, thanks to correct enrichment of the mixture.

It is the kind of detail that does not appear on the final "320 HP" label, but makes the difference between a calibration done with data and one done by eye: more power, with healthier EGTs, not riskier ones.

The DSG software: it is not only the engine that matters

Once the engine started delivering 500 Nm instead of 403 Nm, the DSG gearbox needed its own calibration, separate from the engine's:

• raising the torque limits accepted by the gearbox, so that it can safely handle the new power level
• optimising clamping pressure for more precise torque transfer. The upgrade that makes shifts firmer and more direct.
• adjusting shift speed and shift points, for a better response under acceleration and more natural use

Final results: Stage 1 Octavia RS Brasov, 320 HP and 499 Nm

The simplest way to see the result: the original measurement, 100% stock, overlaid on the final Stage 1, on the same dyno:

The original measurement, 100% stock (dotted lines), compared with the final Stage 1 (solid lines), on the same Bapro dyno: 320 HP and 499 Nm, from 250 HP and 402 Nm stock.

All measurements were made on the same Bapro BPA-2R HP dyno, with DIN 70020 correction, so the figures are directly comparable. And compared with the reference with the intercooler, measured on the same day as the final calibration, the result looks like this:

• power: from 267.3 HP at 5053 rpm to 320.0 HP at 5235 rpm, almost 53 HP more;
• torque: from 403.0 Nm at 2253 rpm to 499.0 Nm at 2944 rpm, 96 Nm more;
• maximum speed recorded during the run: from 234 km/h to 239 km/h.

In practice, exactly the target discussed with Florian back in May, confirmed on the dyno.

Conclusion

From an initial plan with a turbo swap, to a more realistic package, a Black Mamba intercooler to solve a real temperature problem, a separate test to see exactly what the Racingline intake already fitted brings, several data-driven engine calibration versions, and a dedicated DSG calibration, the journey of Florian's Octavia shows how we actually work on every project: we measure before we decide, and we adjust based on what we see, not on what we would like to see.

Looking for a Stage 1 Octavia RS? This is how we do it. If you have a Skoda, VW or Audi with a 2.0 TSI engine and want a Stage 1 calibrated on real figures for your car, see exactly what we can do for it in the AMC configurator or book online at AMC Motorsport Brasov.