More than 10 psi of boost is pushing the limits of the stock ignition and you really need to upgrade to a more powerful voltage supply. The first is Copper, which is becoming more and more expensive. Spark plugs wear out over time as the electrode material wears down. A spark plug is threaded into the cylinder head and protrudes into the cylinder area. As cylinder pressure increases, the energy needed to jump the gap between electrodes does too. A cold spark plug transfers heat faster from its firing tip into the insulator. If you run a supercharger or nitrous oxide, you want to go as low as you can with the heat range without fouling up.
I will get into heat ranges later on. The way the spark plug companies control heat ranges is to normally vary the length of the core nose or the alloy of the material used in the electrodes. The lower the octane number the more volatile the fuel and more likely it is to explode when mixed with air and spark is present. The lower the gap setting, the less power you will make though. It melts at 3,200 degrees F.
Nickel is also used as an alloying material for a copper spark plug. The melting point is 7,466 degrees F. Platinum alloys contains a small amount of iridium which is much harder than pure platinum. This report may or may not affect your application. The iridium makes the tip of the electrode very hard.
The energy released by the coil is sent through the spark plug to the electrodes. Just so we are clear, the heat range of the spark plug has no effect over voltage or resistance required to jump the gap. So moving on, regardless if the system has spark plug wires or not, it still has coils and spark plugs. Ford only needed half of the spark plugs to be full platinum, so this was done to save cost. Only half of the plugs will wear out faster than the others. The quality, performance, and reliability associated with the Motorcraft name is available in platinum spark plugs for a broad range of applications—including domestic and imported cars and all sizes of trucks.
The trade off is fouling. There are many different types of spark plugs. The same premium plugs that have 100,000 mile replacement intervals and are used in many new Ford vehicles are the preferred replacements for earlier-model vehicles. Always set the gap on a new spark plug when you take it out of the box. Use a feeler gage or gap tool to adjust the gap.
Effectively, you are blowing the spark out under boost or when the nitrous is applied. Lets start with a spark plug. If this does not occur, you have a misfire or a dropped cylinder. Moving on, the number is always the heat range. Since a hot plug retains more heat before transferring it to the engines cooling system, it can burn off these deposits more efficiently.
Provided the spark can jump the gap between the electrodes. They may also be fouled by overly rich fuel mixtures or oil contamination. Replacing spark plugs and wires are part of a tune-up, so if your spark plugs need to be replaced, you should also consider replacing the spark plug wires. There are a few exceptions to this. The gap setting on spark plug is critical in efficiency and power production as well as emissions. They are normally not set to your vehicles specifications and if not properly set, you will suffer in the performance department. When the cross-reference is set up properly, the reader clicks the specified text in a document to be taken to a targeted location.
The higher the voltage, the hotter the spark. If the plug is to cold, it may not reach its cleaning temperature during normal driving and that will cause the plug to accumulate deposits. I wrote this report up to help you pick the right spark plug for your application and understand why. Likewise, if a spark plug is subjected to extreme temperatures that exceed 1,000 degrees C. You effectively dropped one heat range colder than stock. Each coil is controlled by the ignition control module through two coil leads.
All things being equal, the larger the gap, the more power you can make. Now we are going to talk Motorcraft spark plugs and applications. The ignition coils contain two separate ignition coils. Platinum's high melting point provides superior resistance to erosion. Finally, we will discuss Iridium.
We will discuss three types of materials used today to manufacture spark plugs. If you have a chip that adds timing, drop two heat ranges. If you are running more spark advance via a custom tune or chip and you have a few more advanced modifications, drop two heat ranges colder than stock. This is a nominal range for all purposes. Iridium is used solely as an alloying material for platinum. In fact it may hurt performance. The power did not come from the spark plug itself, but rather from the larger gap area that provided a larger flame kernel.