MORE FUEL EFFICIENT
Tapered side electrodes increase charge accumulation, improve ignition channelsand save fuel
BETTER IGNITION PERFORMANCE
Using 'hot melt" technology, has goodthermal conductivity, air tightness
FASTER STARTUP SPEED
lmprove fuel efficiency and accelerate more smoothly
LONGER LIFE
Has excellent anti-oxidation performance, reduces wear on spark plug gap and prolongs service life
TO SOLVE JITTER
Effectively solve the spark plug oxidation causedby engine jitter, improve engine power
Signs of a Bad Spark Plug
Unlike manufacturers’ guidelines for oil changes, which are overly cautious, the recommendations for how often to change spark plugs tend to be overly optimistic.
For example, if you’ve already got 80,000 miles on a set of 100,000-mile plugs, they’re 80 percent worn and beginning to take a toll on engine performance and gas mileage. Worse yet, after that many miles there is plenty of spark plug wear, and spark plugs tend to seize in the cylinder head.
Removing a seized plug can be costly, especially if the threads in the cylinder head are damaged. So what are the benefits of changing spark plugs? When you consider the gas mileage falloff and the possibility of seized plugs, early replacement makes sense.
Spark Plug & Performance FAQs
Q1. I know my standard spark plug part number but how can I find a performance equivalent?
Please email us your original part number, using the contact form, we will provide a cross reference where available.
Q2. My engine has been tuned/modified, do I need a colder/hotter plug?
You should consult your engine tuner who will be able to advise you on the correct heat range to get the best from your engine. As a general rule, an engine may benefit from a colder grade of plug where modifications made have increased the temperature in the combustion chamber (increased turbo boost, nitrous oxide use, increased compression, ignition timing adjustments), a colder plug will conduct heat away from the firing tip more quickly and thus help reduce detonation/plug damage.
Q3. How long should my spark plugs last?
That is dependant on the application and condition of the engine. High revving engines, driven hard, (eg motorcycles) will wear plugs much more quickly than a large engined car which is used for cruising. Standard copper plugs usually have an estimated service life of 10,000 to 20,000 miles depending upon design and application, recommend changing their Iridium Power plugs before the maximum 30,000 miles. Double platinum types may last 60,000 miles. The plug's optimum performance level is passed a long time before these intervals so we would recommend changing plugs regularly as a matter of course, thus saving fuel costs. An engine fault, ignition or carburation/injection fault or poor adjustment may cause premature wear and/or failure. Tuned engines, engines driven hard, poor quality fuel and other factors may dramatically reduce service life.
Q4. Why do some spark plugs have multiple ground electrodes?
Multi ground electrodes are an attempt by the manufacturers to increase the service life of the spark plug and, in some instances, to reduce fouling. The ground electrodes can wear down rapidly in some engines. Tiny particles of metal are removed from the ground electrode each time the plug fires hence they gradually wear away. There is a misconception that a multi ground plug will produce mutiple sparks - this is not true, only the nearest electrode to the centre electrode will spark, as that becomes worn, a different electrode will be the nearest and become the sparking electrode.
Q5. What should my spark plug gap be set to?
Many spark plugs are preset at the factory and shouldn't need to be adjusted. Please refer to your owner's handbook/manual for the correct gap setting. Gap settings are usually specific to the vehicle rather than the spark plug.
Q6. Should I regap my Iridium spark plugs?
In most circumstances, no. The nature of Iridium spark plugs means that they are able to utilise a larger gap setting while actually requiring less voltage and straining the ignition system less. If you *have* to regap Iridium spark plugs (e.g if misfire occurs due to gap being too large) then do so with extreme care. Do not use a slide type gapping tool or put pressure on the brittle centre electrode as it may become damaged, Iridium electrode tips can be very easily snapped off.
Q7. Can I / Should I use copper grease when installing spark plugs?
No. This is extremely bad practice and we have seen plugs damaged and being reported as faulty as a direct result. There are two main issues: firstly, there is a possibility of contaminating/shorting the firing end of the plug. Secondly, and more importantly, adding lubrication will allow the plug to be tightened far more without reaching the recommended installation torque, this leads to stretching and possible damage of the threads and the risk of internal fracture, disconnection and/or reduced thermal transfer (i.e. effectively operating in a warmer heat range and possibly overheating).
Q8. The resistance value of my spark plug measured with a meter is not what I expected, why?
Whilst it is possible to measure the resistance value of some spark plugs using an Ohm meter (or multimeter set to Ohms measurement), the results may not be as expected. Being able to approximately measure the resistance value depends on the construction of the spark plug and the type of resistor used. For spark plugs which use a wire wound resistor or supressor it is usually possible to take an approximate measurement but for certain types (most notably small engine/garden equipment spark plugs), which often use a carbon pellet type resistor, measurement of resistance requires specialist equipment, most likely resistance reading for this type is open circuit.
Some spark plugs incorporate an 'air gap' or 'auxiliary gap', there is not a continuous circuit fron the connector terminal to the tip of the centre electrode, this can improve spark performance in some instances but it will (obviously) show open circuit when tested for resistance using an Ohm meter.
