How do you increase the torque on an engine?

Increasing engine torque can be achieved through various legal, compliant, and professional methods. First, optimizing the intake and exhaust systems is a fundamental approach: installing high-performance air filters and intake manifolds can increase air intake, allowing more complete fuel combustion; upgrading exhaust pipes and headers can reduce exhaust resistance and improve engine efficiency. Second, supercharging system upgrades yield significant results. Turbocharging utilizes exhaust gases to drive the turbine and increase intake pressure, delivering noticeable torque improvement at medium-to-high RPMs but with turbo lag. Mechanical supercharging, being crankshaft-driven, provides linear power delivery without lag while consuming some engine power. Additionally, ECU remapping can optimize fuel injection and ignition parameters for customized torque enhancement, though professional execution is required to maintain engine reliability; increasing displacement (e.g., cylinder boring and installing larger pistons) is directly effective but involves complex modifications; reducing vehicle weight (through lightweight components or removing excess weight) can indirectly improve torque performance; upgrading the drivetrain (high-performance clutches and transmissions) minimizes power loss and enhances torque delivery efficiency during actual driving. Practical daily methods include using low-viscosity oil to reduce engine friction, using higher-octane fuel to improve knock resistance, and employing proper throttle application to fully utilize engine power. Note that all modifications must comply with regulations and should be performed by professional workshops to ensure vehicle safety and reliability, while avoiding warranty voidance or mechanical failures.