If the heat range is too cold, the spark plug will be unable to properly self-clean by burning off carbon deposits. Choosing the right heat range is crucial for high performance engines. Heat range is the speed at which a spark plug can transfer heat from the firing tip to the cylinder head water jacket and into the cooling system. We’ll cover these elements more in depth later on, but for now, we’ll shed some light on one of the most important-and most misunderstood-factors in choosing aftermarket spark plugs: heat range. These factors include spark plug seat design, thread length and diameter, and reach. However, if you’ve modified your engine, finding just the right spark plugs is a little more involved.ĭepending on your engine modifications, you’ll need to take a few extra factors into consideration before settling on the right spark plugs. Simply tell your auto parts sales rep your vehicle make and model, and they can look up the proper replacement spark plug based on the manufacturer’s recommendations. Fact is you can throw thousands of dollars worth of speed parts at your engine, but those oft-overlooked spark plugs still hold the key to making your powerplant go.įortunately, choosing the proper spark plugs for the average daily-driven vehicle is easy. As performance enthusiasts, we tend to focus on power builders like high-flow cylinder heads, big camshafts, and mandrel-bent exhaust components. It gets no respect-or at least very little. race engines), some less, but all spark plugs should operate in same temperatures: from 500☌ and below 950☌.The spark plug is the Rodney Dangerfield of the hot rodding universe. This parameter indicates how well spark plug transfer heat from the engine. You physically aren’t able to fit spark plug with another thread, so check it in a first place. Thread diameter and pitch are fundamental dimensions. That’s why it’s important to stick to OE gap sizes. On the other hand, bigger spark is harder to occur and has more chances to misfire. Bigger gap creates bigger spark, which ignite more fuel. Gap is a distance between center and ground electrodes. NGK FR5AP-11E (6569) Same characteristics NGK BCPR5ES-11 (6696) Same characteristics NGK BKR5ESA-11 (5643) Same characteristics NGK BKR5EKPB-11 (4302) Same characteristics NGK BKR5EKB-11 (3967) Same characteristics NGK BKR5EP-11 (3440) Same characteristics NGK BCPR5EIX-11 (3306) Same characteristics NGK IFR5G-11K (3107) Same characteristics NGK PFR5B-11B (2867) Same characteristics NGK BKR5EYA-11 (2526) Same characteristics NGK BKR5ES-11 (2382) Same characteristics NGK BCPR5EY-11 (2441) Same characteristics NGK BKR5E-N-11 (2391) Same characteristics NGK BCPR5E-11 (1273) Same characteristics NGK BKR5E BLYB (6719) Same characteristics Denso Q16PR-U (3137) Same characteristicsĭenso SK16R-P8 (3303) Same characteristicsĭenso SKJ16CR-A8 (3370) Same characteristicsĭenso K16PSRB8 (3437) Same characteristicsĭenso SK16PR-F8 (3435) Same characteristicsĭenso FK16R-A8 (3485) Same characteristicsĭenso K16TNR-S9 (3329) Same characteristicsīosch FR8LCX+ (7962) Same characteristicsĭenso K16R-U11 (3120) Same characteristicsĭenso PK16R11 (3134) Same characteristicsĭenso K16PR-L11 (3143) Same characteristicsĭenso K16PR-TP11 (3166) Same characteristicsĭenso K16PR-U11 (3130) Same characteristicsĭenso PK16PR-P11 (3174) Same characteristicsĭenso K16TR11 (3194) Same characteristicsĭenso PK16PR-L11 (3275) Same characteristicsĭenso PK16PR11 (3264) Same characteristicsĭenso PK16TR11 (3289) Same characteristicsĭenso K16PR-P11 (3293) Same characteristicsĭenso SK16R-P11 (3353) Same characteristicsĭenso SK16R11 (3324) Same characteristicsĭenso SK16PR-A11 (3356) Same characteristicsĭenso SK16PR-E11 (3412) Same characteristicsĭenso SKJ16CR-L11 (3396) Same characteristicsĭenso SKJ16DR-M11 (3422) Same characteristicsĭenso FK16R11 (3440) Same characteristicsĭenso SK16PR-L11 (3395) Same characteristicsĭenso Q16PR-U11 (5016) Same characteristicsĭenso VK16PRZ-11 (5628) Same characteristics
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