![]() Just enter your vehicle details to get started! Got a modified or track car? Not a problem, just give us a call on 01209 202 949 or use our custom recommendation form and we'll be happy to look into the best possible choice for you. If you need to know which spark plugs are suitable for your vehicle, simply use our handy spark & glow plug product lookup. Well, below you will find a “heat range cross reference chart” that shows comparisons between 5 major brands of spark plugs. Heat Range Cross Reference Chart:Įver wonder how spark plug heat ranges convert across brands? It can be a pain when you need a new spark plug but you don't know how your current heat range translate to a new brand. This can be very damaging to your vehicles engine as the plug will overheat causing abnormal ignition firing (pre-ignition), that can lead to melting of the spark plug electrodes as well as piston seizure and erosion. If a spark plugs temperature remains too low it can cause loss of ignition spark due to deposit build up on the firing end, which in turn will leave your engine struggling / down on power. High power engines - high heat range (or cold) spark plugĪlthough not as damaging as having a too low rated plug, the effects can still be detrimental to your engine.Low power engines - low heat range (or hot) spark plug.Commonly, you can spot a low heat range (or hot) spark plug as it typically has a long thin insulator nose which can heat up quickly / easily and will not dissipate warmth to the metal shell as rapidly, where as a high heat range (or cold) spark plug has a short thick insulator nose which will transfer heat much easier. Low powered engines don't normally produce as much combustion warmth so won't heat up a plug as much or as rapidly as a high BHP vehicle, therefore the plugs have to be designed accordingly so they can reach and not exceed optimum operating temperatures. Reach Reach is a distance between spark plug seat and the end of a thread. Note: E3 and Autolite cannot be referenced by heat range. Set of four BR9EIX Iridium Spark Plugs Typically for non-turbo, street ported, high performance rotary engines used primarily for city/street driving or. Generally, if a plug has a hotter heat rating it's simply not as thermally resistant as a cooler graded plug. Since all manufacturers have their own heat ranges, we’ve unified all of them to NGK’s chart: heat range 14 (4) means 14 is the brand’s heat range and 4 is NGK’s equivalent. Here is an example if you have a question about the heat range on an NGK spark plug. A 'colder' plug technically is just better at transferring the heat to the. Plugs are rated in such a way that they speak of 'removing heat from the combustion chamber' rather than the spark itself being hotter or colder. ![]() 4 plugs are required for the S2000.Spark plugs heat ranges can vary massively from plug to plug, and (rather frustratingly) can be recorded in a number of different ways, making comparison between brands rather hard. What Ive found interesting and possibly useful: -1 heat range size is anywhere from 70-100C plug temperature difference. For example: an application adding 150 bhp to the factory 240 bhp would require a. 032".Īdjust plug gap from factory specification (.044") approximately. We recommend inspection / replacement at 30k miles. The primary benefit of this plug is is thermal resistance making it ideal for high horsepower supercharged or turbocharged applications which experience high cylinder temperatures. Iridium plugs offer increased electrical efficiency with a narrower iridium type electrode. Iridium IX - For forced induction (supercharged/turbocharged), we recommend the Iridium IX. Insulator top: 14.5mm high-N: Strong ground electrode design: No Letter: V-Grooved centre electrode (14mm thread dia. Honda recommends replacement every 60k miles or sooner. (4) When using a spark plug in a tuned or modified vehicle, in a vehicle that is not listed, or when using a plug type that is not listed, you. (3) Choose your plug model by referring to the vehicle model compatibility table. The factory spark plug for the S2000 is the Laser Platinum No. (2) Plug specifications (design, materials, etc.) varies according to manufacturer. ScienceofSpeed offers the same spark plug with out the dealer premium price. ![]() NGK is an original equipment manufacture for the S2000 spark plugs. ![]()
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