ngk iridium spark plug gap chart

Additionally the concave cut in the ground electrode promotes even gap growth. Welcome to our Triumph spark plug finder.

We carry standard NGK plugs, Iridium NGK plugs, and Platinum NGK plugs. A variety of techniques are used to adjust electrode gaps. Maybe. The added power allows them to open the gap, yet still provide a strong spark.With this in mind, many think the larger the gap, the better. Although the NGK factory will set the gap to a preselected setting, this may not be the right gap for your particular engine. Search by application to find the part you need from NGK or NTK Indexing refers to a process whereby auxiliary washers of varying thickness are placed under the spark plug’s shoulder so that when the spark plug is tightened, the gap will point in the desired direction.However, without running an engine on a dyno, it is impossible to gauge which type of indexing works best in your engine.

NGK as a company tries to stay clear of saying that a racing spark plug (or ANY spark plug) will give you large gains in horsepower. A spark plug part number might fit hundreds of different engines from many different manufacturers. 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. Shop with confidence - get free shipping to home or stores + price match guarantee! Since the gap size has a direct effect on the spark plug’s tip temperature and on the voltage necessary to ionize (light) the air-fuel mixture, careful attention is required. However, when you add a high power ignition system (such as those offered by MSD, Crane, Nology) you can open the gap from .002-.005″.Learn the correct way to check, set and adjust your spark plug gap. As an example, when you raise compression or add forced induction (a turbo system, nitrous or supercharger kit) you must reduce the gap (about .004″ for every 50 hp you add). The larger the gap, the more voltage is needed to bridge the gap. The improved throttle response, superior anti-fouling and high-ignitability makes Iridium IX ® ideal for the performance enthusiast. In fact, some aftermarket ignition systems boast that their systems can tolerate gaps that are extreme. Since 1968, West Marine has grown to over 250 local stores, with knowledgeable Associates happy to assist. The gap should be adjusted by only moving the ground electrode.Another consideration that should be taken into account is the extent of any modifications that you may have made to the engine. Match your year and model to the correct plug for your PWC by using the chart below. Iridium IX ®. Some models have the option of NGK Iridium IX and NGK Platinum. Although the NGK factory will set the gap to a preselected setting, this may not be the right gap for your particular engine. Those with modified engines must remember that a modified engine with higher compression or forced induction will typically require a smaller gap setting (to ensure ignitability in these denser air-fuel mixtures). As a rule, the more power you are making, the smaller the gap you will need.A spark plug’s voltage requirement is directly proportionate to the gap size. Be wary of such claims. The NGK spark plug finder helps find the right spark plug via the NGK spark plug codes.

For a 500 hp engine, you’d be lucky to get 5 hp. NGK Iridium IX spark plugs. A spark plug part number might fit hundreds of different engines from many different manufacturers. It is for this reason that most racers add high-power ignition systems. The incorrect plug gap for your engine can contribute to a high rate of misfires, loss of power, plug fouling, poor fuel economy and accelerated plug wear. Adjusting the Electrode Gap.

While there are exceptions, the bottom line is that without a dyno, gauging success will be difficult. Since the gap size has a direct effect on the spark plug’s tip temperature and on the voltage necessary to ionize (light) the air-fuel mixture, careful attention is required.

The wide gap improves ignition capability and is less sensitive to gap growth. Iridium’s extremely high melting point is perfectly suited to today’s high-temperature engines, delivering outstanding acceleration, fuel efficiency and durability. 25 replacement spark plugs for NGK R5671A-7. NGK do not recommend gap adjustment for precious metal spark plugs. Shop, read reviews, or ask questions about NGK Spark Plugs Spark Plugs at the official West Marine online store.

In most cases, the largest gap you can run may still be smaller than you think.This is for racers only! While it is a popular misconception that plugs are pre-gapped from the factory, the fact remains that the gap must be adjusted for the vehicle that the spark plug is intended for. We've listed the standard plug replacement and the iridium upgrade.

It is always best to check the gap against the manufacturer’s specifications.

The spark chart also gives you the proper gap for your PWC. Those that do will have either a standard ground electrode design, usually in nickel alloy, or a solid platinum bar ground (similar to the Denso racing design) and a 0.4mm Iridium alloy centre electrode. See cross reference chart for NGK R5671A-7 and more than 80.000 other spark plugs. MarineEngine.com 184 Jones Drive Brandon, VT 05733 USA (800) 209-9624 (802) 247-4700 (802) 419-3055 Fax

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