E3 has taken multiple spark plug design features, such as cut back ground electrodes, sharp edges and surface gaps, and combined them to create a new ground electrode design. Thanks, I was just curious. You need a feeler gauge to gap your spark plugs properly. When replacing spark plugs, ensuring that the plugs have the proper gap is critical to engine performance. When adjusting the gap on a spark plug, any spark plug, the best tool to use is a wire feeler gauge. A feeler gauge is shown here. This directs the spark to the edge of the center electrode, thus exposing it … I've read all the advertising blurb about multi electrode types such as Bosch but wonder if there is really any benefit in fitting such items or whether they might actually cause inferior combustion as … Explaining my opinion on multi-electrode spark plugs (are they a marketing gimmick?) NGK.com specializes in hard to find NGK products. To contact them, click here. That distance is what we call the SPARK PLUG GAP. A. To close the gap on a plug, gently tap the plug, electrode first on a hard surface. It has a single electrode with larger dimensions compared to other spark plugs. I have q78yc and while single electrode plugs are plentiful, I can’t find multi electrode ones online. Andrew Markel shows how and how not to gap a fine-wire spark plug. If you’re using a new plug, it should be clean and new-looking, with the tip of the side electrode centered over the center electrode. Brief overview of Multi-Ground Electrode spark plugs from NGK Spark Plugs. To find the right gauge, look for a spec sheet for your automobile in the owner’s manual, or you can get the information from a local auto parts store. The wire should catch on them as it passes through. I made the mistake of measuring and misreading the gap on a few dual electrode plugs. If adjusting the gap on fine wire or precious metal plugs such as platinum or iridium, be very careful not to apply any pressure or prying force to the fine wire center electrode or insulator as they can be damaged. The gap is obviously not flat on the dual electrode NGK BPR6EKN, it's u-shaped. Surface gap plugs present the flame kernel to the piston (or rotor) more directly, reducing the travel time from the spark to the combustion gases. Most people go through the “too large–too small–too large” bit a couple of times for each plug, especially the perfectionists. This is an extreme Champion racing spark plug once used in 15:1 NASCAR superspeedway motors with a radically cut-back side electrode. For the electricity to be able to jump between the two electrodes the spark plug have to be at a very specific distance. Sponsored by DENSO. Anyone know a model number for 2 way 3way or 4way electrode spark plugs for a 2 stroke 01 johnson? When people buy the multi ground spark they tend to think about performance when they should be thinking of stability and durability. * X suffix = .044" * Y suffix = .060" * Z suffix = .080" Gaps should never by adjusted on Platinum+4 or Platinum2. Caution should be made in selecting a "high performance" plug. If it is necessary to widen the gap, do so with a tool that only pulls back on the ground electrode without touching the center electrode or the porcelain. Most Bosch Spark Plugs are factory pre-gapped for popular vehicle applications. The spark gap is the closest distance between the center electrode and the side electrode. It is always best to check the gap against the manufacturer’s specifications. The gap measurements are indicated either on the box, or by the part number located on the spark plug shell. The electricity sparks between the top of the center electrode and the bottom surface of the side electrode. To increase the gap, gently bend the ground electrode towards the center electrode. Do not mistake the BRISK Multi-Spark technology for spark plugs with multiple ground electrodes, as these gaps are arranged in a parallel. Multi-Ground plugs are offered in 2, 3 and 4 ground electrode designs. Are Bosch Spark Plugs pre-gapped at the factory? This setting should not be altered in any way for any reason. Can anyone tell me if you are supposed to gap the recommended twin ground plugs when installing them in the 3.4? But they've been bought for an earlier vsn of the engine in this car. NGK do not recommend gap adjustment for precious metal spark plugs. All standard multi ground electrode spark plugs have a factory pre-gaped setting. Hook the part of the feeler gauge that’s used for bending electrodes under the side electrode and tug very gently to widen the gap. You shouldn’t see any cracks or bubbles in the porcelain insulator, and the threads should be unbroken. Thus, if the engine design requires a side discharge plug, more ground electrodes extend plug life. For the spark plug to ignite the fuel air mixture the electricity has to arc between the two electrodes of the spark plug. NGK doesn't recommend adjusting the plug gap more than .008" in either direction. The spark occurs one at a time in which ever facilitates the spark to occur (heat, closest one to the center, “gap”, electri c conductivity and i gnition system A spark plug creates a small string of high-voltage electricity within a specifically measured gap between a center electrode and a ground electrode. An appropriate method and tool should be used for gap adjustment although it has come to our attention that a variety of improper methods are used that lead to implications. I guess since most people don’t use them the google search would be useless. Q. * Gapping is not recommended on multi-ground plugs, and should never be attempted on the Bosch IR Fusion series. If the wire didn’t go through, the gap is too narrow. The type of spark plug makes a difference on gapping. The gap is the distance between the center and side electrodes, set so arcing occurs at the proper voltage that ignites the fuel and generates the combustion that makes the engine run. Adjusting the Electrode Gap. I've seen some other plugs with multiple electrodes with as many as 6 points that claim to "fire hotter", but that makes no sense, since the spark is naturally going to follow the one path of least resistance, which would be whichever electrode is closest to the center, seems like just a sales gimmick to me. Fine Wire Plugs. It is important to note that multi-ground does not mean multi-spark, there will still only be one spark at a time. Spark/ignition comes from the spark plug. Run the wire between the two electrodes of the spark plug. 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