Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.1 exptools 1/6/84; site ihuxq.UUCP Path: utzoo!watmath!clyde!burl!ulysses!mhuxj!houxm!ihnp4!ihuxq!redbud From: redbud@ihuxq.UUCP (Al Kelkhoff) Newsgroups: net.auto Subject: Spark plug heat range Message-ID: <1254@ihuxq.UUCP> Date: Tue, 2-Oct-84 17:31:13 EDT Article-I.D.: ihuxq.1254 Posted: Tue Oct 2 17:31:13 1984 Date-Received: Wed, 3-Oct-84 23:59:01 EDT Organization: AT&T Bell Labs, Naperville, IL Lines: 10 I would like to know if anyone has information regarding spark plug heat ranges. I read recently that to increase the performance of my 2.2 engine I should replace the current N12Y plugs with N9Y or N7Y plugs. As the numbers go down does the heat rating go up? thanks al kelkhoff ihuxq!redbud