Racing Spark Plug
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NGK Racing Spark Plug

Part No. 3442 Warranty Details  



Product Features:
  • Special center electrode configuration and design help ensure durability and ignitability
  • Ground electrode configuration helps ensure durability
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Electrode Core Material:nickel with V groove
Electrode Tip Material:nickel with V groove
Ground Strap Quantity:1
Manufacturer Heat Range:9
Shorty Spark Plug:No
Spark Plug Reach:0.460 in
Spark Plug Seat Type:tapered
Spark Plug Thread Size:14 mm
Tip Configuration:Loose
Wrench Diameter:5/8 in

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1 Question | 1 Answer
Displaying question 1
  • Q:

    what heat range is better, from 6 to 9.??
    Asked on 8/22/2012 by big dogg from fayetteville

    1 answer



      The term Heat Range refers to the relative temperature of the core nose of a spark plug (also refers to the speed with which the plug can transfer heat from the combustion chamber to the engine head). Normally a hot spark plug is used in a cold engine (Low Horsepower) and a cold plug in a hot engine (High Horsepower). The term (heat range) actually refer to the heat rating or thermal characteristics of the plug; more specifically, the plug’s ability to dissipate heat from its firing end into the engine cooling system. A cold plug, by definition, transfers heat rapidly from its firing end into the cooling system and is used to avoid core nose heat saturation where combustion chamber or cylinder head temperatures are relatively high. A hot spark plug has a much slower rate of heat transfer and is used to avoid fouling where combustion chamber or cylinder head temperatures are relatively low. Hot Spark Plugs (Low Heat Range) have a relatively long insulator nose with a long heat transfer path. Cold Spark Plugs (High Heat Range) have a much shorter insulator nose and thus, transfer heat more rapidly. The heat range of a plug does not affect the power output of an engine. Generally, An unaltered engine will run within the optimum operating range straight from the manufacturer, but if you make modifications such as a turbo, supercharger, increase compression, timing changes, use of alternate racing fuels, or sustained use of nitrous oxide, these can alter the plug tip temperature and may necessitate a colder plug. A rule of thumb is, one heat range colder per modification. Additional Info: When making spark plug heat range changes, it is better to err on the side of too cold a plug. The worst thing that can happen from too cold a plug is a fouled spark plug, too hot a spark plug can cause severe engine damage.

      Answered on 8/22/2012 by Aaron from AAP
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