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- BKR7E Copper Tipped spark plugs are one range colder, ideal for when you have a 3.25" pulley or smaller - Help eliminate Knock Retard & get a better conductor of ignition current - Comes in Set of 4
NGK Spark Plugs (BKR7e)- Your Price: $10.99 USD + $6.99 Shipping
Iridium IX Spark Plugs are the most technologically advanced high performance plugs available. Featuring a 0.6 mm iridium center electrode tip, they offer superior ignitability without sacrificing durability. The tapered ground electrode increases flame kernel expansion, while the superior heat range design is ideally suited to the demands of high performance environments. Specially designed to meet the needs of serious enthusiasts, Iridium IX Spark Plugs offer outstanding acceleration, high fuel efficiency and long life. When you demand the most from your engine, rely on the proven performance of NGK Iridium IX Spark Plugs. Iridium plugs burn clean and a colder range of plug can be used without the normally associated risk of plug fouling. This is why we recommend them over the Autolites for the boosted Ecotec.
These are one range colder for added boost applications. Set of 4
NGK Spark Plugs Iridium (BKR7Eix) - Your Price: $30.99 USD + $6.99 Shipping
These are TWO ranges colder for added boost applications(2.6" pulley or smaller). Set of 4
NGK Spark Plugs Iridium () - Your Price: $30.99 USD + $6.99 Shipping
New spark plugs should always be gapped prior to installation. The stock LSJ spark plug gap setting is .045", and that works fine for the lower boost settings. As the boost increase, smaller plug gaps are required to prevent spark blow-out. Following are our dyno-proven LSJ spark plug gap recommendations:
3.30" to 3.20" supercharger pulley - .045" gap
3.10" to 3.00" supercharger pulley - .045" gap
3 - 2.90" to 2.80" supercharger pulley - .040" gap
2.70" to 2.60" supercharger pulley - .035" gap
2.50" supercharger pulley - .035" gap
Courtesy of Intense/Cobaltss.net Forums - Settings are meerly suggested for reference. Tuning is the only correct way to find out what is right for your particular application