That is when someone changes the operating parameters of the engine.
From the factory the air/fuel mixture, turbo boost maximum, shift points, shift duration, and many others are configured to maximize longevity, fuel economy and comfort.
When someone changes those values, they are choosing to trade any one of the previous things for more power. Usually durability is the biggest trade off. You generate more heat, use more fuel and wear components out more rapidly.
Its like adjusting the pressure regulator on your house water main. Same hardware, but now you can dial up the water pressure to max. You will also probably start seeing more leaks at faucets, water heater and appliances that must now sustain that higher pressure.
That is when someone changes the operating parameters of the engine.
From the factory the air/fuel mixture, turbo boost maximum, shift points, shift duration, and many others are configured to maximize longevity, fuel economy and comfort.
When someone changes those values, they are choosing to trade any one of the previous things for more power. Usually durability is the biggest trade off. You generate more heat, use more fuel and wear components out more rapidly.
Its like adjusting the pressure regulator on your house water main. Same hardware, but now you can dial up the water pressure to max. You will also probably start seeing more leaks at faucets, water heater and appliances that must now sustain that higher pressure.