By Okello Samuel
A spark plug is a device that creates an artificial bolt of lightning in the combustion chamber of an engine. It transmits the high voltage electricity to ignite a spark which further fires the air and fuel mixture in the engine's combustion chamber. This spark starts the combustion process which eventually powers our cars and motorcycles.
A good spark plug results in the smooth start of the engine and better fuel economy, eventually resulting in the engine's longevity and good health. Nowadays there are different kinds of spark plugs available in the markets to choose from i.e. copper, platinum, and Iridium spark plugs.
Copper Spark Plug
The copper spark plug is the most commonly used as it is the cheapest among the three. In copper spark plugs the outer material used is nickel-alloy which wears down easily because of the high pressure and the high heat generated in the engine's cylinder. This wear results in the fouling of the spark plugs because of this they have a short life span.
Platinum Spark plugs
Platinum has a higher melting point than the nickel-alloy. Also, it is harder which is the reason it maintains it’s sharp edge for a longer time than the copper spark plug. Another advantage is that it easily handles high heat which increases the overall life span of the spark plug. Platinum spark plugs come in two varieties – single platinum spark plugs and double platinum spark plugs.
Iridium spark plugs
Iridium has a higher melting point and it is stronger than platinum which provides it superior wear characteristics. Also, iridium spark plugs feature a thin wire center electrode which conducts electrical energy better and increases the firing efficiency. Because of all these qualities, the life span of iridium spark plugs is more than that of platinum spark plugs.
With this information, you can know which spark plug best suits your engine. For high-performance engines, you will no longer compromise on the high-end spark plugs but rather choose them. Remember, the brands of spark plugs matter too due to many variations in manufacturers' ways of production.
Good brands especially, OEMs are best for performance and durability.
SAMUEL OKELLO
B.Eng. Automotive and Power Engineering
Technical Director
S-Line Motors LTD
Plot 6, Ojara Close, Mbuya
https://goo.gl/maps/bEGeVEN7tUVTqHnu8
0779745722 / 0708000888