What is the maximum horsepower that can be achieved by tuning the 4a91 engine?

[SanAlexander]

4a91 engine can be tuned to 170ps horsepower, with an approximate increase of 20ps. Advantages of ECU tuning: Significant improvement in power output. For naturally aspirated models, there is a 5%~10% increase, while turbocharged models can see up to a 30% improvement, which is particularly noticeable for turbocharged engines. Disadvantages of ECU tuning: Higher fuel quality requirements. Previously, 92 octane gasoline was sufficient, but after ECU tuning, 95 octane gasoline is necessary, and fuel consumption may become abnormally high. Increased engine temperature demands. Since the engine operates at an overclocked state after ECU tuning, the original cooling system may no longer meet the heat dissipation needs, leading to potentially fatal damage from excessive engine temperatures.