NGK R5671A-9-7382 Racing Spark Plug 7382 Solid Type

【NGK R5671A-9-7382 Racing Plug 7382 Integrated Type】
■Product Description
For race or tuned engines!
NGK racing plugs are special spark plugs for those who race or drive on circuits, or those who have increased their engine's output through tuning. Choose the optimal racing plug for your car and aim for the best performance.

Specifications
The firing end of a spark plug is exposed to the combustion chamber, repeatedly receiving heat from the combustion gas and dissipating it to the engine. The heat range indicates the balance between the heat received (by the firing end of the spark plug) and the heat dissipated. The temperature of the spark plug is determined by the balance of heat received and heat dissipated, but it is necessary to select a heat range that maintains this balance and allows the spark plug to be used normally.
●Hot Type and Cold Type
Among spark plugs, those that are more prone to receiving heat and burning the firing end are called "hot type" (low heat range), while those that are less prone to receiving heat and burning the firing end are called "cold type" (high heat range). The hot type on the left has a long insulator and a large surface area that receives heat from the insulator, causing the spark plug itself to heat up. The cold type on the right is the opposite, making it less prone to heating up.
●Heat range is too low (hot type)
If the spark plug temperature rises too high, it can induce abnormal combustion (pre-ignition), leading to melting of the plug electrodes and even piston seizure.
●Heat range is too high (cold type)
If the spark plug temperature does not rise easily, carbon accumulates on the firing end, allowing electricity to escape and preventing a spark from flying.
●About the firing end shape
The firing end shape of a racing plug must be selected according to the degree of tuning and driving conditions. Generally, a type with the firing end protruding into the combustion chamber offers superior ignition performance. However, on the other hand, it is more exposed to high-temperature combustion gases, and the outer electrode is also long, which can cause thermal or mechanical problems. High-performance, high-output engines tend to have higher temperatures in the combustion chamber and greater engine vibration, so as tuning progresses, it becomes increasingly necessary to select a firing end shape with a shorter outer electrode that is less exposed to combustion gases.

■Image Notes
*The image is for illustrative purposes only. It includes products with different sizes and colors. Product designs and specifications may change without prior notice. Please understand.

■Precautions
*The heat range and firing end shape of racing plugs must be selected according to the degree of engine tuning and driving conditions, so please make your choice at your own discretion and responsibility.
*Please note that we are not responsible for any engine or plug problems that may arise as a result.