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Racing Plugs
  • NGK Racing Plug Recommendations

  • Choosing A Racing Plug

  • Installation Guide

  • 2007 NGK Racing Plug Catalog

  • NGK U.S. Racing Plug Chart


    • Special Plug Features
  • Bi-Hex


    • Conversion Charts
  • Displacement Conversion Chart

  • NGK Racing Wires

  • Heat Range Interchange (NGK-Denso-Champion- Bosch)


    • Center Electrodes
  • Fine wire

  • Ultra-fine

  • Taper cut

  • V-Power


    • Ground Electrodes
  • Double Fine Electrode

  • trapezoid

  • Cut back ground

  • Tapered cut

  • Angled ground strap

  • Multi-ground

  • Supplementary gap

  • Intermittent discharge

  • Semi-surface discharge

  • Surface discharge


    • Resistor Types
  • Resistor

  • Inductive resistor


    • Precious Metal Types
  • Platinum

  • Gold palladium

  • Iridium


    • Plug Problems
  • Breakage

  • Erosion

  • Lead Erosion

  • Lead Fouling

  • Melting

  • Normal Plug Wear

  • Overheating

  • Shadowing

  • Corona Stain

  • Fouling

  • Bridging

  • Deposits

  • Pre-ignition

  • Flashover

  • Quenching


    • Plug Properties
  • Thread

  • Reach

  • Hex

  • Terminal

  • Seat

  • Center electrode

  • Ground electrode

  • Copper core

  • Diameter


    • Ignition Anachronism
  • Wasted Spark Ignition

  • Radio Frequency Interference

  • RFI

  • ISO

  • JIS

  • Distributorless Ignition System

  • DIS

  • Capacitor Discharged Ignition

  • CDI


    • Glow Plugs
  • Quick-start type

  • Standard sheathed type

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  • Self-regulating sheathed type

  • After Glow

  • Ceramic Glow Plugs


    • Oxygen Sensors
  • Signal

  • Planar

  • Air Fuel Sensor

  • Flanged

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  • 1 Wire

  • 2 Wire

  • 3 Wire

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  • Cross Count

  • stoichiometric

  • air/fuel ratio

  • Lambda Sensor

  • Titania

  • Universal Oxygen Sensor

  • Zirconia

  • Wide Band Oxygen Sensor

  • 5 Wire Oxygen Sensor

  • Reading old oxygen sensors

  • Oxygen Sensor Diagnostic Testing

  • NTK OE Identical Oxygen Sensor Installation Instructions

  • NTK Universal O2 Sensor Installation Instructions


    • Manufacturer's Numbering System
  • NGK


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    Performance Chart
    Performance Chart

    Voltage and Temerature
    Voltage and Temerature

    Glow Plug
    Glow Plug

    		 Quick-start type glow plugs are a type of sheathed glow plug that have a heating curve whose resistance changes with the temperature. The resistance is initially low so that plenty of current flows through the heating curve. The temperature increases faster than in standard plugs – and as a result the preheating time reduces.
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