![]() Neither is likely to apply to you, or anyone for that matter who doesn't know exactly which gap they want to run. Or the other option is magneto ignition, again rare unless a purpose-built race engine, likes a big gap but will misfire at lower RPMs, where the engine's purpose isn't relevant (such as drag racing) or it's done for style reasons (hot rods, custom big motor / super-lightweight motorcycles). The gap can be adjusted by only moving the. then maybe 0.32 might be more to the engine's liking. Iridium plugs normally come pregapped and if slightly wider than factory recommended the plug will fire just fine. Set of 4 Spark Plugs Iridium TT DENSO Twin Tip 4704 IKH20TT Pre gapped. rare, these days even Big 3 motors have had electronic ignition since the 1970s as standard. Replacement spark plugs for INFINITI 224015M016 on Ebay. If you happen to be running a points-style mechanical ignition. Denso ITV24 Spark Plugs Two Steps ColderThese two step colder plugs are recommend for those running high boost levels.These are NOT pre-gapped by us as you. Your car will probably be just fine with it. Use the pre-gapped plugs and stop worrying. ![]() Unless you have a highly tuned high compression race motor, the added value of that extra 0.14" isn't critical (it un-shrouds the spark a little, which in theory makes it easier to light the charge, but if you're not misfiring, which you should notice as roughness, it's lighting the charge just fine). Even with small variations in the factory set gap the ultra-efficient firing power design will compensate for those. In most cases your Iridium Power plugs do not need to be gapped. NGK recommends a round wire-style or pin gauge gap tool to measure the gap. Care must be taken to avoid bending or breaking off the fine-wire electrodes. There are advantages to having as wide a gap as possible, but then again there is a line where you start to get misfires. Before attempting to gap any DENSO Iridium Power spark plug, please review the specification chart in the front of this catalog to verify the factory-preset gap. Gapping fine-wire spark plugs While most NGK spark plugs are pre-gapped, there are occasions when the gap requires adjustment. They have taken their time but Denso have finally started. the plugs will work fine with that gap, again with any modern electronic ignition. Denso plugs come pre-gapped so you should not need to alter the spacing. On the other hand 0.40 is not "too close". an electronic ignition in good condition should be able to cross about 0.60 with typical street vehicle compression ratios and maximum RPMs. Re-gapping (you should check, though) is not recommended as you may create cracks or actual breakage, now or sometime after installation.Ġ.54 is a fairly large gap for a modern OEM recommendation, but it's not out of the realm of practicality. Make sure to follow us on Instagram: Youtube.Iridium is a very hard, brittle material. Let us make this experience simple, easy, and awesome, so without hesitation give us a call at (480) 576-8606, feel free to direct message on our live chat or CLICK HERE to contact us via email. Education and awareness are the principles that keep us ahead of the curve. We understand that finding the right parts can be overwhelming.
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