I have been running Autolite ar134's. They are to cold. How does a the heat range on a no racing plug compare? Is a 23 hotter than a ar 135 or colder?
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I have been running Autolite ar134's. They are to cold. How does a the heat range on a no racing plug compare? Is a 23 hotter than a ar 135 or colder?
Why do you think the 134's are too cold. Unless you are 9-1 compression it is unlikely. 23 is the same heat range but with a extended tip, 135 is hotter.