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What is tuning?

What are the factors to consider when tuning?

HKS considers "Tuning" as improvement of vehicle overall performance in response to user needs. When tuning, some users may have some incorrect thought which may lead to them fitting the wrong parts for their needs. For this reason it is important for the user to know "what their target/goal" is and "what parts are needed" to achieve this goal. Here we will explain engine tuning, from light to hard, as simply as possible.

Overall performance puts "safety first" whilst improving the three basics of vehicle performance, "accelerate, turn, decelerate" with the right balance between the three elements. For example, by increasing engine power, inadequacies may be felt in the braking or suspension which were not noticeable before. Also when increasing engine power at high engine speeds (rpm), if the power at low-mid engine speeds remains the same as before, due to the change in power delivery characteristics the driver can feel the illusion that the vehicle has lost power in low-mid engine speeds. Replacing just one part can increase the stress and damage other parts and so it is essential to maintain the correct balance when tuning to increase performance safely.