Noble metal plugs can perform consistently and well, which helps to maintain the engineered performance of the engine. Are noble metal plugs worth it? If you are designing an extremely high performance car where the plugs will be subjected to extreme conditions, they are probably a good idea. But if you are hoping to improve the performance of your car, your money will be better spent elsewhere. Bonus : In our research for this article, we came across a link to an issue of Popular Science from in which spark plug technology was explained with illustrations from Walt Disney.
Not only is this fascinating in itself, but the whole magazine is fun to read to see how much the world has changed. Like classics? Home Autos. Source: iStock Early spark plugs were made with nickel electrodes and cores. Increased durability and high melting point Nickel-chromium alloys have a melting point of 2, degrees Fahrenheit compared to 3, for platinum and 4, for iridium, so it is likely that the durability of noble metal plugs would be higher. Consistent performance over a long life Given the durability of these metals, the gap between the two electrodes should remain fairly constant, which will make the spark consistent.
Iridium plugs take less voltage to fire which results in more coil dwell time. That translates to better combustion, lower emissions, better fuel economy and more horsepower. Lower your costs. By spending a little more up front, you are able to extend your spark plug change interval, saving you on costly maintenance charges over time.
Starting your car in the winter. Upgrading your spark plugs to a Iridium finewire plug will provide instant starts in cold weather and help eliminate the risk of fouling. Using your Warranty. In this article:. However, despite the higher cost, iridium spark plugs are still the best high-performance option, for the following reasons:.
Businesses that upgrade to iridium spark plugs from alternative metals always report a longer component lifespan. On average, an iridium spark plug might last to operating hours. This helps keep repair bills down and reduces the total lifetime cost of ownership of your engine. Iridium is part of the platinum group of metals but is around eight times as strong as platinum itself, meaning that an iridium spark plug can take a lot of damage before it starts deteriorating, and is less prone to unexpected failure.
For high temperature combustion chambers, therefore, iridium spark plugs are sometimes the only option. If you dont mind changing them every 10k miles then go for cheaper copper plugs Edit: that doesnt mean the coppers will only last 10k miles, I just mean that they wont last as long. Edited by RobCrezz on Friday 8th October ILoveSpeedBumps 57 posts months. Well ive just found this on the NGK website: "Outstanding acceleration, high fuel efficiency and durability" Clearly you dont even need a TVR just a 1.
The more expensive ones will be made using iridium. These have been known to give an increase in power, the increase depending on engine size and number of cylinders. TommyBuoy 1, posts months.
HellDiver 5, posts months. Some engines need Iridiums, though. Try running a Ford Duratec on elcheapo plugs and you'll soon discover this.
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