The NGK 6619 Iridium IX Spark Plugs snags the top pick in our spark plug comparison because they offer the best mix of high-performance, fuel efficiency, durability, and dependability. Understanding spark plug wire resistance ranges and the application for each type of range is critical when purchasing plug wires. you dont need the best on the market, and if the cheapest have a lifetime warranty, it makes no difference other than you will change them often. : Yes, the brand matters when it comes to performance (better MPG, etc). I'm just curious about the wide range of resistances and whether it matters. They were out of the box right at .035 and I set them at .040. However, if that spark plug interval is let's 100,000km as some of them claim, then the gap will likely spread over the change interval to a much larger gap than the spec range. Plug wires and resistance...does it really matter? To test the resistance for the secondary coil I'm going to put the positive lead in where the spark plug goes and then I can put my negative lead on to either of the wires for the primary coil. If the insulation resistance drops, there also occurs a drop in electrical voltage supplied to the spark plug from the ignition system. Second, the slower current flow extends the duration of the spark, ensuring the entire charge is ignited. Spark plugs in a gasoline engine have … Jump to Latest Follow 1 - 4 of 4 Posts. Size matters—but not in the way you think. it means longer starts, less performance, economy, and higher operating and maintenance costs. All internal combustion engines have a spark plug, or in the case of diesel engines, a glow plug, to initiate combustion in the engine. 1. (PN 7000014) Anyhow, I figured I would check the resistance of the new wires before I put them on. Spark plugs serve a very important purpose for the internal combustion engine. 6. You could use regular, deep well sockets on spark plugs, but do not do it. Vee8ight. 1. At zero resistance coil discharge is completed. 14: 29.17%: Yes, the brand matters on how long they last. You can then also increase engine rpm to verify spark at higher speeds. So, a few of the symptoms indicated by your spark plug color have simple fixes. On the port engine, I gapped all of the plugs. Knowing how to read spark plugs can help you identify potential engine-related malfunctions early on and save you expensive repairs. Three Main Types of Spark Plug. The recommended 7/16" gap has always worked for me on outboard motors. Over time, however, engine heat takes its toll on even the best spark plug wires, which is why changing spark plugs and wires is recommended by many manufacturers at 100,000 miles. If your car is pre-1980 then there is a very good chance this is the spark plug wire variety you’re using. have DENSO spark plugs....and have heard they are the best brand...but need to replace spark plug wires, distributor cap now too and need to do it asap....so went to "O Reilley's Auto Parts" and purchased their recommended brand "Import Direct" spark plug wires and distributor cap and etc...is this a good brand or does it really not matter? A paltry 5KOhms does not do anything when compared to the nearly infinite resistance of the gap itself (until the plug fires that is). Resistance in the spark plug (or wires, or caps) does 2 things. Over 95 % of American cars were fitted with these, and for good reason, if they were fitted as standard you should try to … Distributed Resistance Spark Plug. You will break or crack the spark plugs porcelain body. OEM type plug wires are usually a carbon fiber that helps minimize RF noise. 5k allows for controlled spark doration. Posted by 6 years ago. Let’s take a look at the stock OEM plug wires as a reference point for a conservative type plug wire. Whether you have resistance or not does not matter. As spark path ionizes resistance become zero. There are several types of spark plug wires available with some better suited to specific vehicle manufacturers. Does the type of spark plug really matters? This means that the spark must jump the 7/16" gap and the spark plug gap in the motor while running. Close. I drive a mustang 94 with the cheapest spark plugs, and i'm wondering if it will make any difference if i change them. As you may very well know, compressed air and fuel are mixed together in the internal combustion chamber. Resistance in spark path was used before radio was common, before RFI was an issue. share. Changing your spark plug(s) can be an easy task - it just depends on your model of bike and how easy it is to access to spark plug(s). Spark plug resistance. The readings are as follows. Do spark plug wires matter? First, by slowing the current flow it reduces EM static that can interfere with electronic ignitions. Too small of a gap and the electrodes themselves will have an increased likelihood of quenching the very small initial burn, known as the flame kernel. If it tells you anything. I think the resistive path is related to spark doration. NGK (V power tip) I run/use mostly std AC delco plugs unless the combo calls for something AC don't have. Discussion Starter • #1 • Jul 17, 2009. A Taylor ThunderVolt plug wire could easily test at around 40 ohms per foot, which means reduced-resistance and more energy applied to the spark plug. According to BMW service sheets, the spark plug(s) on the F650 should be changed every 10,000kms (6,000miles). 06-10-2009, 07:32 AM Types of spark plug wires. Archived. I use mine in line between the spark plug installed normally in the engine and the plug wire. Your spark plug condition not only can tell you if it’s time for replacement, but can speak volumes about the engine as well. Depending on your engine, the plug generally dictates the angle it is going to have. It was due for plugs and wires, so I picked up a set of NGK's as well as the NAPA premium (Belden blue) wires. Did a bonehead thing yesterday :rolleyes: I changed the plugs in my Cig. Copper Spark Plugs. For example, NGK, Autolite, Champion, Bosch, Denso, AC Delco, will all tell you not to use anti-seize with their modern coated spark plugs. Once the plug fires the resistance comes into being. In my drag car, street car nd every engine I build for customers.. 1 of 3 brand plugs goes in it Ac delco (std plug) Autolite (std plug or AR racing plugs for turbo/boosted/nitrous engines NGK (V power tip) I run/use mostly std AC delco plugs … Introduction. Until that happens NO CURRENT FLOWS. hide. what does this mean to you? cheap plug wires start gaining resistance in less than a year. Why does Resistance Matter? So, if your vehicle has a little less spunk lately; it might be time to change your spark plugs. Spark ignition is resistive sensitive. A resistor spark plug will delay the time when the spark jumps. I want to get some colored wires, but they all claim improved performance but don't define how that is achieved or what actual performance increases there may be. Spark plugs are responsible for producing […] You need to make sure that the gapping of the spark plugs should be proper no matter which one they are. Now is the time to add a quality set of spark plug sockets to your toolbox. Does the type of spark plug really matters? Worst case, this would result in a complete misfire. Wire 1: 4.8k Ohms Wire 2: 5.5k Ohms Wire 3: 5.5K Ohms Wire 4: 6.2K Ohms Indexing plugs can only be achieved when a conventional-type “gapped” plug is the threaded into the head. The spark plug color can provide evidence of what is happening inside the engine. Ac delco (std plug) Autolite (std plug or AR racing plugs for turbo/boosted/nitrous engines . Verifying that the electrode gap of the spark plug is facing the air/fuel mixture allows the mixture to ignite more efficiently. report. Am about to put in a new NGK wire set and NGK G-Power Platinum spark plugs (to replace the existing NGK V-Power spark plugs). 10 comments. Copper spark plugs are generally considered to have the best performance of any spark plug type. Voltage builds in a ramp regardless of how the spark is generated. save. The mechanics behind indexing a set of plugs are quite simple. But for engine power to be generated from this mixture, it needs to be ignited by an electric current. Many spark plug manufacturers have issued statements saying that using anti-seize on spark plugs in 2018/19 is not advised. This is potentially different from what advertising companies suggest, but the other metals are, unfortunately, not as conductive in general as copper is. I'm looking at changing my spark plug wires, and am torn between a few sets. The Wilmar W30936 5 Piece Spark Plug Socket set is a complete spark plug socket set that is very reasonably priced. Hmmm, 5 wrong answers, until this post. The spark plug is the device that causes the fuel/air mixture in the cylinder to burn. If the spark plug is placed too close to the engine body then it can have a welding effect and render the spark plug useless and this could happen to any of the plugs, not just for copper ones. The spark needs of a stock 216-cubic-inch inline-six Chevrolet are drastically different than those of a supercharged big-block Ford. 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