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Quote:
Originally Posted by estout81
JSeery,
See post 19. The picture shows Autolite 4092 plugs [ 1/2 in. reach]. The chamfer takes out a little less than a 1/8 in.
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That's where I'm getting lost I guess. 1/8 in = .125 So if you add the .125 to the plug reach you get .500 + .125 = .625 which is what the long reach plugs with the spacers are and no chamfer is required. What am I missing here and how would this cause the plug to hit the exhaust valve? Is the valve at maximum lift that close to the roof of the cylinder? If it is, then the plug is going to have to be shrouded up in the threads or the plug is not going to be able to have an extend electrode below the thread surface of the plug.