How to Increase Power for a 1.5L Naturally Aspirated Engine?

[KinsleyLee]

Engine modification generally refers to upgrading the vehicle's ECU (Engine Control Unit), commonly known as 'flashing stages,' which are categorized into Stage 1, Stage 2, and Stage 3. The familiar intake system modifications, such as installing a high-flow air filter (commonly referred to as a 'mushroom head'), aim to maximize air intake volume while reducing intake air temperature. Additionally, upgrading to a larger exhaust system with wider diameter and faster flow exhaust components can further enhance performance. Replacing the spark plugs with high-energy, stable ones helps minimize energy loss in the ignition system. Combined with a well-balanced air-fuel mixture and high-quality gasoline, these modifications naturally lead to increased power output.

[DelEvelyn]

I've modified my 1.5L naturally aspirated engine myself. To boost power, you need to approach it from several aspects. First, replace the air filter with a high-flow one to let the engine breathe more smoothly—improved intake efficiency directly translates to better power. The exhaust system shouldn't be overlooked either; switching to a low-backpressure exhaust pipe allows smoother exhaust gas flow, and when combined, horsepower can increase by about 10%. Next, consider ECU tuning—reflash the program to optimize ignition timing and fuel injection. This costs a bit but delivers noticeable results. I've done these myself, starting at around 1,000–2,000 RMB, and daily driving feels much more responsive, with easier highway overtaking. Lastly, don't forget weight reduction—removing unnecessary weight like rear seats or the spare tire improves the power-to-weight ratio, naturally enhancing overall performance. Before modifying, always check your car's condition to ensure durability isn't compromised.

[MacAaliyah]

As a seasoned car repair technician, when it comes to improving the power of 1.5L naturally aspirated engines, I always recommend starting with simple modifications. Exhaust optimization is key—installing a high-performance exhaust system to reduce backpressure allows the engine to 'breathe' better, resulting in increased power. ECU remapping is another effective method; adjusting parameters like fuel injection rates can boost horsepower by 8-12%, but the software must be compatible with the vehicle model to avoid triggering fault lights. Regular maintenance is crucial, such as cleaning the throttle body or upgrading to high-performance spark plugs, ensuring the engine operates at peak condition. The total cost starts from a few thousand yuan. While these upgrades make the car more responsive, avoid excessive modifications that may cause overheating or accelerated wear. Choose reputable shops and prioritize safety—invest within your means.

[Etta]

When driving a 1.5L naturally aspirated car and wanting to boost power, I started with low-cost modifications. After installing a cold air intake kit, I felt quicker acceleration and enjoyed the improved engine sound. I also tried an ECU optimization program, which instantly increased power and made highway driving easier. Upgrading the spark plugs was effective too—after replacing them myself, throttle response became noticeably sharper. These modifications cost less than a couple thousand yuan. While the improvements aren't dramatic, they're practical and sufficient for daily use. Remember to maintain the car more frequently—don't overlook small maintenance tasks like cleaning the air filter, as consistent upkeep is crucial for long-term performance.