Types of Spark Plugs

In most cases, you will see at least four different types of spark plugs from at least three different manufacturers to choose from. How do you know which are the best spark plugs to buy?

 

In most cases, you will see at least four different contact us now. from at least three different manufacturers to choose from. How do you know which are the best spark plugs to buy? We will further explain the differences between platinum spark plugs, copper spark plugs, iridium spark plugs and other spark plug types . In addition, we'll give you some solid advice on which spark plugs are best for your vehicle.

 

Copper spark plugs - where to use them

Copper spark plugs have a solid copper core, but the business end of the central electrode is actually a nickel alloy with a diameter of 2.5 mm. This is the largest diameter electrode of any spark plug type. Remember, the smaller the diameter, the lower the voltage required to initiate a spark. Nickel alloys are also softer than platinum or iridium, so the sharp burnished edges you take out of the box tend to wear out quickly.

Single platinum spark plugs - a step up from copper spark plugs

Basically the same style as a copper spark plug after a platinum disc welded to the front of the central electrode. Because platinum is harder than nickel alloy, it retains its sharp edges for up to 100,000 miles. Platinum spark plugs also operate at a higher temperature, which prevents spark plug deposits from building up and fouling.

Platinum spark plugs are often the best for new vehicles with electronic distributor-based ignition systems (DIS). If your owner's manual recommends platinum spark plugs, do not downgrade to copper spark plugs to save money. However, you can upgrade to twin platinum spark plugs or iridium spark plugs.

 

Double platinum spark plugs - twice as good?

Double platinum spark plugs are designed for "waste spark" DIS. In a waste spark system, the spark jumps from the central electrode to the side electrode of the compression stroke cylinder. In order to return the electrical impulse to the ignition coil pack, the spark jumps backwards (from side to centre) on the paired cylinders. As the paired cylinders are on the exhaust stroke, no spark is ignited and the spark is "wasted".

Iridium spark plugs - the best

Iridium is harder than platinum and in most cases Iridium spark plugs last about 25% longer than their platinum counterparts. Due to the high price of iridium, Iridium spark plug manufacturers have reduced the diameter of the centre electrode to 0.4 mm. In addition to saving money, the "thin wire" centre electrode on iridium spark plugs also improves ignition efficiency.

Many vehicle manufacturers require Iridium spark plugs or Iridium/Platinum combination spark plugs for (COP) ignition systems.

 

When the spark ignites the air/fuel mixture, the cooler side of the electrode tends to "extinguish" the flame. To prevent flame out, some spark plug manufacturers cut "U" or "V" shaped channels in the "spark receiving" surface of the side electrode. The larger channel area reduces quenching and allows the flame to grow more quickly. Other manufacturers separate the ends of the side electrodes to reduce flame contact with the side electrodes and allow the flame to be directed into the cylinder.

 

Are these channel electrodes the best spark plugs you can buy? There is no industry-wide consensus as to whether these designs work better, but if channel spark plugs make sense for you, buy them.

If you want to get more information about the best spark plugs, welcome to contact us today or request a quote.