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So this is why they put all the restrictions in the ecu, cant get more power and meet the emissions without destroying the engine?
No, it's about legal cheating. Map it to pass the noise and emissions protocols. It's arguable that more realistic mapping may be better for engine longevity.
 

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Ok, I meant that you cant maximize engine performance without breaking emission regulations. Wont it damage the engine in the long run if you keep it to lean on the fuel?
No, because where they lean it out is under light load conditions, basically when you're just cruising on the highway at small throttle openings and you're not asking much from the engine. When you get on the throttle, it won't run lean. If anything, they tend to run it slightly rich to be on the safe side.
 

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No, because where they lean it out is under light load conditions, basically when you're just cruising on the highway at small throttle openings and you're not asking much from the engine. When you get on the throttle, it won't run lean. If anything, they tend to run it slightly rich to be on the safe side.
Ok, I'm leaving this ecu-thing to the dynopeople🧐
 

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It feels like the engine is less stressed after removing restrictions, also runs smoother.
If an engine is making more power, it is more stressed. But if it remains within design parameters it won't go bang.
 

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That's not so much stressing the engine as the drivetrain.
 
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