The added power allows them to open the gap yet still provide a strong spark. With this mind, many think the larger the gap the better. In fact, some aftermarket ignition systems boast that their systems can tolerate gaps that are extreme.
Be wary of such claims. In most cases, the largest gap you can run may still be smaller than you think. However, without running an engine on a dyno, it is impossible to gauge which type of indexing works best in your engine. While there are exceptions, the bottom line is that without a dyno, gauging success will be difficult.
When you need your engine to run a little hotter, run a hotter spark plug. However, NGK strongly cautions people that going to a hotter spark plug can sometimes mask a serious symptom of another problem that can lead to engine damage. Be very careful with heat ranges. Seek professional guidance if you are unsure. With modified engines those engines that have increased their compression more heat is a by-product of the added power that normally comes with increased compression.
In short, select one heat range colder for every hp you add, or when you significantly raise compression. In SoCal? We work very hard to offer commerically supported products and to keep info relevant here.
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It may not display this or other websites correctly. You should upgrade or use an alternative browser. Thread starter oalvarez Start date Sep 30, CA HWY 2.
GT di Razza Pura. Joined Jul 1, Messages 12, Location Malibu. Obie, if you unscrew the stock cap, you still have to cut the end off in order to thread the new one on. The spark plug holes must always be clean prior to installation; otherwise, you may be twisting against dirt or debris and the spark plug will be under-torqued, even though your torque wrench indicates the proper torque.
Of course, you should only remove and install spark plugs in a cool engine, because metal expands when hot and thread damage can happen. Proper torque specs for both aluminum and cast-iron cylinder heads are listed below. Skip to content.
Spark Plug Installation Torque is one of the most critical aspects of spark plug installation.
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