That chart also gives a good rundown on understanding heat range and optimum plug for your application to ensure plug does not foul up (combustion heat too cold for plug to self clean) and at the other end of the scale where combustion temps are too high for the plug and it gets so hot it is pre-igniting the charge before the plug fires causing pinging and the resultant destructive damage that can cause.

The BPR6ES spark plug is designed with a copper core electrode. This feature provides excellent conductivity and heat transferability for reliable engine ignition and efficient combustion. This listing is for one plug so if you need more then simply add that number of items to your basket. However, it is always better to consult your car’s manufacturer’s manual to ascertain the spark plugs’ specifications for your internal combustion engine; otherwise, ask a professional auto mechanic. What does the P stand for in BPR6ES? The BP6ES spark plug is built with a colder heat range compared to its BPR6ES counterpart, which means that the former is designed with the capacity to dissipate more heat and prevent engine overheating. High quality NGK spark plug which is designed using the latest technology to give optimum performance over the Lawnmowers entire rev. range

What spark plug is hotter, 8 or 9?

NGK BPR5ES and BPR4ES spark plugs are both manufactured by NGK. The two spark plugs are built with several similarities in many ways. However, they also have a couple of vital differences just like BP5ES Vs. BPR5ES. MB spec copper core ignition leads with the resistance built into the connector ends should all all test at aprox 1,000ohms +/- a few ohms when new no matter what the length of the lead and that is what the system was designed for. The spark plug heat range has no relationship to the electrical energy transferred through the spark plug. The heat range of a spark plug is the range in which the plug works well thermally. The heat rating of each NGK spark plug is indicated by a number; lower numbers indicate a hotter type, higher numbers indicate a colder type. The P in BPR6ES stands for “projected insulator or projected tip.” This type of spark plug has an extended ceramic insulator tip that protrudes further than regular insulator tips in most spark plugs. Undoubtedly, NGK manufactures some of the best spark plugs in the automotive industry. Nevertheless, their various spark plug models are designed for use in different applications.

Generally, both the BPR5ES and the BPR6ES spark plugs are sold with a standard manufacturer’s warranty. However, the period and terms of the warranty will largely depend on the supplier in some cases. What Is The Difference Between NGK BPR5ES And BPR4ES? The NGK Standard Spark Plug is constructed from durable material that is corrosion and abrasion resistant. The spark plug insulators are made of 99 percent pure alumina silicate, allowing for longer insulator noses for reduced fouling. This spark plug features a triple gasket sealing process that eliminates fuel leakage. It also includes a solid copper core that provides superior heat dissipation and conductivity. This spark plug has resistor that is produced with a glass and carbon mixture, which is fired to ensure superior performance and durability. It has corrugated ribs that prevent flashover and cold rolled threads to inhibit damage to the cylinder head. Many vehicle owners use BPR5ES spark plugs to fight poor fuel economy issues, as well as acceleration and emissions problems.Spark plugs with projected tips can focus the spark further, thereby enabling the plug to swiftly ignite the air-fuel mixture and deliver an efficient performance. What happens if you run a hotter spark plug? A spark plug produces a high intensity electrical discharge (the spark) inside the combustion chamber, igniting your fuel to keep the engine firing. However, the reverse is the case for some spark plug brands (the higher the number, the hotter the plug). If you desire an NGK spark plug to be used in a high-performance vehicle engine, ensure to choose a colder spark plug that can handle the high RPM and loads. What is the proper gap for BPR5ES? Champion RN11YC4, Denso W16EPR-U, and Bosch WR7DC spark plugs are some of the close substitutes for the BPR6ES spark plug. These spark plugs are also designed with thread size, reach diameter, and capacity to deliver optimum engine performance and efficiency like their BPR6ES counterpart. You can consider one of them if you’re looking for a replacement for your BPR6ES. Is it OK to mix spark plug types?