What are the pros and cons of ECU remapping?

[LaAnthony]

ECU remapping has the advantage of improving vehicle performance, but the disadvantage is that it may affect the vehicle's usage. Below are detailed explanations: 1. Advantages: Naturally aspirated engines can see a 5%-15% increase in power and torque, with the optimal torque point responding earlier than the factory settings, thus resolving the issue of shaking during gear shifts in small-displacement vehicles, resulting in smoother gear changes. Turbocharged models can achieve over 30% improvement in power and torque. Factory turbocharged models typically activate the turbo at around 1800 RPM, but after ECU remapping, the turbo engages at approximately 1500 RPM, allowing torque to be delivered earlier and broadening the maximum torque output curve, making the vehicle more fuel-efficient compared to its original state. 2. Disadvantages: If the ECU upgrade is not done properly, it can affect the engine's lifespan, trigger warning lights, and cause unbalanced power output. Some models may experience excessive power after the upgrade, leading to insufficient braking force, which could increase braking distance and compromise safety.