Reading spark plugs for racing is a precision technique that should be distinguished from the more generic meaning of reading spark plugs, as the published information intended for commercial mechanics to diagnose engine damage is insufficiently accurate. Read your spark plug color-spark plug reading chart March 29, 2017 auto Auto Knowledge 0 If you are a auto repair technician,reading spark plug is essential skills for you.Not?You are a owner?Oh,the skill is essential too!You should get the auto statement at any time.Read spark plug,you will not only know when to replace it,but also know your health of your car. If your timing is too far retarded, then it may be necessary as you adjust the timing to add a little more fuel to keep the crescent on the end of the plugs white for 90% of the area. The natural option for tuning up a Ford vehicle is installing Ford spark plug, and seeing as this is the spark plug that Ford recommends, Motorcraft is a great choice. Spark plugs are capable of running anywhere from cold to hot in a given engine, depending on plug design. Nearly all of it is just as pertinent today as it was twenty years ago. A special tube with an angled mirror is supplied in the kit to make viewing easier. It is reported to eventually build-up gasoline deposits if the mixtures are rich, although the excessive alcohol content tends to clean the spark plug porcelain, making it tough to read the color of the porcelain as a tuning guide. With a lighted spark plug magnifier, you can look deep inside the plug casing for signs of incorrect heat range. Reading a spark plug consists of examining and evaluating the condition and color of the tip of the plug. As your plug heats up, a color line begins to form on the ground strap. I'm going to keep working on this page and try and get some real good shots of various plugs, we'll study each one and find the good and bad tell tales of each. Much like a knife maker who looks for the proper “temper line” to read metal temperature, we can use the same method to read spark plugs. With nitrous an NGK can get you in trouble before you knowit.l By the time the Starp shows as hott the piston is ruined. Top Porcelain for Detonation – Apart from pre-ignition, the porcelain reveals an approximate condition on detonation (timing/octane). Examining the ceramic insulator is the first step in plug reading. Spark plugs are heat rated. Most of the spark plug manufactures that make plugs used for racing plate the spark plug shell with cadmium or zinc which oxidizes at a temperatures that corresponds to the correct As one is tuning the motor and leaning the fuel system out the first … Reading Spark Plug Performance The ability to read spark plugs can tell a mechanic a lot about the state of tune of an engine and about some of the problems an … THIS IS ONE REASON RACING SPARK PLUGS HAVE A SHORTER STRAP THAT REACHES HALFWAY TO THE CENTER ELECTRODE SAME LIKE THE PICTURE ABOVE, YOU CAN STILL SHORTEN THIS, AND GAP ON SECOND OPTION IS TO ADD WASHERS TO THE SPARK PLUG SEAT, THIS WILL RETRACT THE SPARK PLUG INTO THE CHAMBER AND MAKE THE TIP COOLER AS IT IS "LESS" EXPOSED TO THE … We spoke to Don Ward from E3 Spark Plugs about the art of examining the combustion markings on a plug for tuning and plug choices. 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