How to Modify a Naturally Aspirated Engine to Increase Power?
2 Answers
Methods to increase power in a naturally aspirated engine through modifications are as follows: 1. Replace the rims and tires. 2. Install a larger exhaust pipe. Changing to a larger-diameter, high-flow exhaust pipe improves exhaust efficiency and enhances the exhaust sound, while also increasing the car's kinetic energy. 3. Upgrade the ignition system efficiency. Replacing spark plugs can improve engine performance. Since ignition coils output over 100KV, but high-voltage wires and spark plugs lose some energy, the actual voltage used for ignition is only 20-50KV. To reduce energy loss in the ignition system, using high-energy, stable spark plugs, well-mixed air-fuel mixture, higher compression ratio, high-quality gasoline, and reducing vehicle weight can increase power by up to 10%. 4. Install a turbocharger. Adding a turbocharger to a naturally aspirated vehicle can significantly boost horsepower.
For naturally aspirated engines to boost power, the key lies in optimizing internal components. I've personally modified quite a few, with camshaft upgrades being the first choice—this alters valve timing, increasing intake and exhaust volume, which is quite suitable for street use. Next is raising the compression ratio, switching to forged pistons or lightweight connecting rods for higher efficiency and more responsive revs. Don’t forget the balance shaft and crankshaft strength to avoid excessive vibration at high speeds. Performance spark plugs help with ignition, and pairing them with high-flow fuel injectors ensures an even air-fuel mixture. Finally, adjusting valve clearance ensures proper sealing, all of which require professional tools for measurement—consult the manual before tinkering to avoid mistakes. Actually, switching to a lightweight flywheel can also reduce power loss, but post-modification engine lifespan may shorten. It’s advisable to regularly check oil and coolant to prevent overheating, balancing performance and durability.