Specifications

Q: Is there a noticeable improvement if I use Silverstone, and if yes, why?
A: Yes. The large diameter silver center electrode increases Silverstones spark carrying ability, together with spark power,
up to 137%.
Q: Are there any other reasons why Silverstone spark plugs are superior?
A: Yes. Silverstone spark plugs are manufactured to highest quality standards and are made exclusively out of top grade
materials. This gives Silverstone spark plugs high reliability and very good high voltage insulation.
Q: How long will Silverstone spark plugs last?
A: Silverstone spark plugs will last about three times as long as conventional spark plugs. Silver is a precious metal and
therefore extremely resistant to erosion, guaranteeing a virtually unchanged electrode gap for the life of the spark plug.
Q: What about spark plug gap?
A: The spark plug gap is the same as the one recommended by the manufacture of the engine in which Silverstone is to be
used, unless the Silverstone spark plugs are used together with HotWires. In that case use the spark plugs as they come
(pregapped to 0.8mm). To gap spark plugs always use a spark plug gapping tool. Never pry the ground electrode with a
screwdriver or similar object. This could permanently damage the spark plug and voiding the warranty.
Q: Why do I need resistor plugs?
A: You dont always need to use resistor spark plugs. True, some electronic engine management systems are more sensitive to
RFI. However, most engines will not experience any problems with non-resistor spark plugs, especially if there is some
resistance in the spark plug cap or the wires.
Q: So non-resistor spark plugs are better for performance?
A: Yes. If you are looking for performance you want to use non-resistor spark plugs. A resistor is exactly what the word implies.
When the spark crosses the point of resistance some of the spark energy is lost. A resistor is like an electronic obstacle
and could be the cause for a weak spark. Non-resistor spark plugs deliver a more powerful spark.
Q: Why do car manufacturers recommend resistor spark plugs.
One reasons is actually emissions. Since the resistor is an obstacle it forces the spark voltage to be higher, assuring combustion
in a lean mixture. Also resistor plugs are MUCH cheaper to produce. You will never find resistor plugs in serious race cars, yet
these cars use some of the most sophisticated engine management and data acquisition systems. But these cars have no EMI
problems. Why? The spark happens inside the combustion chamber where he is completely shielded by the metal cylinder
head. No EMI can escape the combustion chamber.
Q: How tight should spark plugs be?
A: This is a very important point. Most of the time spark plugs are too tight, (over torqued). This will result in a deformed spark
plug, with the internal seal damaged. A spark plug damaged this way can lead to premature spark plug failure and even engine
damage. For proper torque values, please check with the spark plug manufacturer.
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