The wider you open the gap, the more the sparks created, and this can increase the efficiency of the engine. Most people don’t pay attention to this and will just purchase any type of spark plug without considering their pros and cons. It has the 3.8 six cylinder with auto transmission. Plus are readily available and cheap. Past experience showed me that the surface gaps will actually increase RPM at W.O.T. This demands more voltage to jump the gap, but it usually creates a bit more complete combustion at low engine speeds. If you drive your car normally and tune the engine regularly, you can increase the spark plug gap by about 0.010" for better performance and better fuel economy. The increased length of the spark travel weakens it, robbing it of the hot, strong ignition charge it needs to fire the plug. Research engine technology explains it's statistical to some extent and a spark plug increases the odds in a particular location. Changing the electrode gap is called a spark plug gapping. For stock, NEVER trust manufacturer set plug gaps, guess what boxes get dropped and tossed around and gaps get changed. A performance ignition system allows you to open up the spark-plug gap. I was wondering what the results would be increasing the gap another .010? Even after removing all of the stuff in the way, there still isn't any room the get to them. The metal channels the high voltage from the spark plug wire through the spark plug so it can spark when it goes across the small gap between the central electrode and the side electrode. Re: can someone explain spark plug gap for me? 10-18-02 07:29 AM - Post# 130455 In response to ranman The larger the gap the better IF you have an ignition system that is strong enough to jump a wider gapped plug. Fortunately, spark-plug gaps can be easily adjusted by mechanics, including many amateur do-ityourselfers. Does increasing spark plug gap above factory specs increase gas mileage? no, not wider gaps necessarily , they are just there for high energy systems versus the older points-based system, which had lower voltage coils and couldn’t jump the bigger gap. The nominal life span of iridium plugs can be 120000 miles with negligible amount of degradation. The fatter the spark you place in the combustion chamber, the more efficient combustion you will experience. This is all engineered in concert with other emissions controls. If your spark plugs aren’t properly gapped, your engine may not burn fuel properly. It can improve the acceleration profile of your vehicle. With equipment such as plug wires in less than perfect condition, under the hood at night can some times look like a flashing Christmas tree. Spark plugs in automobiles generally have a gap between 0.6 and 1.8 mm (0.024 and 0.071 in). Spark plugs are typically designed to have a spark gap which can be adjusted by the technician installing the spark plug, by bending the ground electrode slightly. Spark plug gap refers to the gap between the spark plug center electrode and the grounding electrode. Excessive plug gap also results in cylinder misfiring, a possible no-start condition, wet, black or fouled plugs, engine hesitation and rough idle. I was able to change the front three no problem however, I found that I needed to take off a whole bunch of body parts to get to the back three. Like I said before as well. Plugs have a fast cooling rate that boosts performance. The cycle can go on 2 , 3 or maybe even 5 times. Also, the spark plug gap should never exceed .055" unless pre-set by the manufacturer. UNIQUE AND PATENTED HIGH-PERFORMANCE SPARK PLUG DESIGNS COMPLETELY NEW SPARK GAP SHAPE. This advantage occurs because there is a faster response to your throttle operations. Ironically, the car manufacturer's recommended spark plug gap is not optimal! As a result, less voltage is required (not more than 5000v). Spark Gap voltage will again reach break-down potential at the plug. Some spark plugs are better than others, depending on what they’re made from. Therefore, if your spark plugs need replacing, go out and pick up not only the proper plugs but the tools that will make gapping them easier. Each spark takes so much energy. I've read some threads where a couple of folks were thinking about changing the spark plug gap another .010 after installing a Pertronix Igniter III and Flame Thrower III coil. If your spark plug part number has no trailing digits then (for most part numbers) it will be preset to this specification. It is easier (takes less energy) for a spark to glide along the surface of the insulator than to break through the air gap. Help! The use of metals like nickel alloy, platinum and iridium reduces the wear caused by high voltage sparks. NGK 6619 Iridium Spark Plugs LFR6AIX-11 - 6 PCSNEW. Wear out fast at less than 20,000 miles. The diameter of iridium plugs is around 0.6mm, which is considered to give the sufficient balance between the service life and performance. Spark plug torque is very important. When you make the switch to iridium spark plugs, then you may notice an immediate improvement to your acceleration profile. The gap spacing of general spark plugs is between 0.6 and 1.3 mm. Spark gap - Vertrauen Sie dem Favoriten der Experten. A spark-plug gap gauge both measures and adjusts the gap and is inexpensive and simple to use. The spark plugs' potential is strenuous in the tip of iridium. Most Brisk and other manufacturer sparkplugs are preset to around 0.75mm - 0.8mm. Spark plugs may sound like they all serve the same purpose, but there are actually different kinds of spark plugs available on the market. 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