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. save. Verifying that the electrode gap of the spark plug is facing the air/fuel mixture allows the mixture to ignite more efficiently. Resistance in the spark plug (or wires, or caps) does 2 things. 1. The main difference between them is that one set is 350 ohms resistance, and the others are 500 ohms. Why does Resistance Matter? NGK (V power tip) I run/use mostly std AC delco plugs unless the combo calls for something AC don't have. All internal combustion engines have a spark plug, or in the case of diesel engines, a glow plug, to initiate combustion in the engine. You will break or crack the spark plugs porcelain body. (PN 7000014) Anyhow, I figured I would check the resistance of the new wires before I put them on. If it tells you anything. Second, the slower current flow extends the duration of the spark, ensuring the entire charge is ignited. report. Voltage builds in a ramp regardless of how the spark is generated. 14: 29.17%: Yes, the brand matters on how long they last. First, by slowing the current flow it reduces EM static that can interfere with electronic ignitions. This is potentially different from what advertising companies suggest, but the other metals are, unfortunately, not as conductive in general as copper is. Depending on your engine, the plug generally dictates the angle it is going to have. it means longer starts, less performance, economy, and higher operating and maintenance costs. 10 comments. The spark needs of a stock 216-cubic-inch inline-six Chevrolet are drastically different than those of a supercharged big-block Ford. Does the type of spark plug really matters? Three Main Types of Spark Plug. They were out of the box right at .035 and I set them at .040. Copper spark plugs are generally considered to have the best performance of any spark plug type. OEM type plug wires are usually a carbon fiber that helps minimize RF noise. At zero resistance coil discharge is completed. Spark ignition is resistive sensitive. As you may very well know, compressed air and fuel are mixed together in the internal combustion chamber. 06-10-2009, 07:32 AM 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 readings are as follows. 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). Whether you have resistance or not does not matter. Understanding spark plug wire resistance ranges and the application for each type of range is critical when purchasing plug wires. cheap plug wires start gaining resistance in less than a year. The Wilmar W30936 5 Piece Spark Plug Socket set is a complete spark plug socket set that is very reasonably priced. According to BMW service sheets, the spark plug(s) on the F650 should be changed every 10,000kms (6,000miles). A paltry 5KOhms does not do anything when compared to the nearly infinite resistance of the gap itself (until the plug fires that is). So, if your vehicle has a little less spunk lately; it might be time to change your spark plugs. If your car is pre-1980 then there is a very good chance this is the spark plug wire variety you’re using. You could use regular, deep well sockets on spark plugs, but do not do it. 5k allows for controlled spark doration. Close. 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. I use mine in line between the spark plug installed normally in the engine and the plug wire. Now is the time to add a quality set of spark plug sockets to your toolbox. I drive a mustang 94 with the cheapest spark plugs, and i'm wondering if it will make any difference if i change them. Spark plug resistance. what does this mean to you? Posted by 6 years ago. 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. View Poll Results: Does the brand of spark plugs matter? Until that happens NO CURRENT FLOWS. 6. The spark plug is the device that causes the fuel/air mixture in the cylinder to burn. 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? Ac delco (std plug) Autolite (std plug or AR racing plugs for turbo/boosted/nitrous engines . Types of spark plug wires. Worst case, this would result in a complete misfire. 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. For example, NGK, Autolite, Champion, Bosch, Denso, AC Delco, will all tell you not to use anti-seize with their modern coated spark plugs. Many spark plug manufacturers have issued statements saying that using anti-seize on spark plugs in 2018/19 is not advised. Once the plug fires the resistance comes into being. Resistance in spark path was used before radio was common, before RFI was an issue. Plug wires and resistance...does it really matter? But for engine power to be generated from this mixture, it needs to be ignited by an electric current. The mechanics behind indexing a set of plugs are quite simple. The spark plug color can provide evidence of what is happening inside the engine. Spark plugs in a gasoline engine have … The recommended 7/16" gap has always worked for me on outboard motors. Let’s take a look at the stock OEM plug wires as a reference point for a conservative type plug wire. Wire 1: 4.8k Ohms Wire 2: 5.5k Ohms Wire 3: 5.5K Ohms Wire 4: 6.2K Ohms Spark plugs serve a very important purpose for the internal combustion engine. Distributed Resistance Spark Plug. Indexing plugs can only be achieved when a conventional-type “gapped” plug is the threaded into the head. share. So with my positive in the spark plug lead and my negative just on the earth for the coil, I … : Yes, the brand matters when it comes to performance (better MPG, etc). 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. Your spark plug condition not only can tell you if it’s time for replacement, but can speak volumes about the engine as well. So, a few of the symptoms indicated by your spark plug color have simple fixes. 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. Over 95 % of American cars were fitted with these, and for good reason, if they were fitted as standard you should try to … Hmmm, 5 wrong answers, until this post. Vee8ight. You can then also increase engine rpm to verify spark at higher speeds. If the insulation resistance drops, there also occurs a drop in electrical voltage supplied to the spark plug from the ignition system. A resistor spark plug will delay the time when the spark jumps. Archived. I think the resistive path is related to spark doration. You need to make sure that the gapping of the spark plugs should be proper no matter which one they are. On the port engine, I gapped all of the plugs. I'm looking at changing my spark plug wires, and am torn between a few sets. Introduction. Knowing how to read spark plugs can help you identify potential engine-related malfunctions early on and save you expensive repairs. Do spark plug wires matter? As spark path ionizes resistance become zero. hide. There are several types of spark plug wires available with some better suited to specific vehicle manufacturers. 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. Spark plugs are responsible for producing […] This means that the spark must jump the 7/16" gap and the spark plug gap in the motor while running. 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. I'm just curious about the wide range of resistances and whether it matters. Jump to Latest Follow 1 - 4 of 4 Posts. Did a bonehead thing yesterday :rolleyes: I changed the plugs in my Cig. 1. 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. 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). Does the type of spark plug really matters? 88% Upvoted. Discussion Starter • #1 • Jul 17, 2009. 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 … Copper Spark Plugs. Size matters—but not in the way you think. 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