The basics you need to know for Choosing The Best Spark Plug Wires
Mar 20 , 2020

Typically the super conductor spark plug wires are designed to upgrade an OE ignition system for high-spark delivery levels for street driven applications. Let's study the basics of spark plug wires and figure out the best spark plug wires for your application.

How spark plug wires work?

The spark plug wires have a simple job that they carry spark energy from the distributor (or coil) to the terminal of the spark plugs. When the electricity travels to the other end of the plug, and jumps a gap between electrodes to produce the "spark" that ignites the fuel mixture.

Like everything else on your car, spark plug wires need to be checked and require periodic changing. If you want to keep the performance of your engine at the optimal level, we recommend you replace your spark plug wires at the same time you replace your spark plugs. Fouled, damaged, or worn out spark plugs can lead to a variety of engine problems, such as misfires, hard starts, increased emissions, poor fuel economy and reduce acceleration. For most vehicles, you should replace your spark plugs every 30,000 miles.

How to chose the best spark plug wire from a million different kinds with many different features?

1. You need to figure out what your car application is?

2. There are three commonly used wire cores for super stock spark plug wires to suppress the electric noise of EMI (electromagnetic interference) and RFI (radio-frequency interference).

  • With graphite impregnated fibreglass core usually boast very low RFI, it's very similar to OEM wires. However, the resistance of this core is high which can cause a weak spark and potentially rob you of power.
  • With magnatism rubber and Ni-Cr wire winding wrapped aramid fiber core has medium resistance of 500 ohms/ft (± 50 ohms).  The Plug wire with this core for the highest suppression possible.
  • Tinned copper core has high RFI and 0 resistance, a low resistance wire can't hurt the performance or durability of your engine. However, the high RFI needs to be considered. With an all-out race car or something with a points or magneto ignition, a low resistance wire may be the way to go in order to maximize the available spark energy.

3. Heat resistance and durability is another concern when it comes to plug wires. The 450 F rated silicone jacket provides the plug wires with high temperature and chemical resistance, but there are two different material boots of silionce rubber and ceramic. The ceramic boot spark plug wires can withstand up to 2,000 F, and the silicone boots spark plug wires withstand up to 450 F.

4. Size is the last consideration for the spark plug wires, 8 or 8.5mm spark plug wires are commonly used on most applications. Exceptions would be an all-out race car or a street rod where EMI/RFI suppression is not a concern, but weight and appearance are. In which case, a 5 or 7mm spark plug wires might be a better option. Of course on these types of builds, remember to go with a universal DIY type of wire, which is cut-to-fit. By building your own plug wires you can elect how you would like to route the wires, just make sure they come with the right shaped boot.

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