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GJF GJF is offline
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Join Date: Dec 2004
Posts: 765
A givin plug designed for a specific motor will run a steady temp and as long as the mixture is correct, it should last quite a long time. If you have more power being generated the the plug can become too hot and promote detonation. (meaning the plug will be so hot the temp of the plug will ignite the fuel in the cylinder before the coil sends the spark). To control temp or to change the range of the plug the amount of ceramic exposed in the end of the plug determines how hot it will be. If the ceramic is recessed alot in the end of the plug the colder it is, the more exposed the hotter it is. The more power you make the more heat you can generate. so finding the right plug to live in extreme motors is a neccessity. As Goran states you can go to cold and foul the plug. Climate, elevation, and all elements of nature definetly play a part. But if you have normal mods to your 930, only 1 or 2 heat ranges colder would be sufficient.
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87 911 Carrera platform
Twin Garrett's, Big Valve, Xtreme Cylinder Heads, JB Racing cylinders and machine work, custom JE pistons, GT2 EVO cams, GT3 oil pump, modified 3.2L intake, 80mm TB, custom Intercooler, equal length headers, DFI, KEP Stage 2 custom twin disc, G50 custom gear set, LSD, Tilton trans pump, Fluidyne cooler
Old 03-20-2008, 04:31 PM
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