The SEAT Leon equipped with the 1.5 TSI Evo engine is recognized for its smoothness, efficiency, and good response out of the box. However, there is a significant margin for improvement through reprogramming.
The calibration is always preceded by a detailed datalog, which aims to thoroughly evaluate the dynamic behavior and critical parameters of the engine under real usage conditions. During this process, we use advanced tools to record essential data such as turbo effective pressure, exhaust gas temperatures (EGT), ignition timing advance and retard, exact values of the air-fuel mixture (AFR or lambda), engine load, and an accurate estimate of the torque generated by the engine. Analyzing this data allows us to clearly identify areas that can be optimized and also anticipate preventive strategies to avoid thermal or mechanical problems that may arise after the calibration.
The original data shows a maximum torque of around 250 Nm, with a conservative response at lower RPMs, especially up to 2200 rpm. It is possible to observe torque limiting strategies related to high temperatures in the exhaust due to the OPF. Furthermore, through this original datalog, we can assess the overall health of the engine, quickly identifying any issues or anomalies present. If any critical parameter is outside the expected range, the calibration process is immediately aborted, thus ensuring the integrity and safety of the vehicle.
After calibration, we achieved a significantly broader and more robust torque curve, reaching around 330 Nm and noticing the difference starting from 1800rpm. Despite the limitations imposed by the particulate filter (OPF), we managed to efficiently control the exhaust temperatures and protect the turbo with a smooth reduction in pressure at high RPMs, providing a fluid and linear rise in revs up to the cutoff.
The entire process was carried out using the bFlash tool, which enables precise and efficient reading, writing, and datalogging, ensuring maximum safety throughout the entire calibration process.
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