I remember a strip run when I had a weak valve spring that caused me to float a valve in a 427 Chevy at about 8,300 RPMs, and that was with triple springs. That made a mighty big hole in that slug, and you should have seen what the slug hammering it back through the combustion chamber of the head did to that aluminum head. There was a whole lot of scrap going on during that expensive losing run. I have seen weak threads in a head allow a spark plug to blow out. It happens. But if an internal touching a plug is the cause of it jetisonning, well, rebuild time is coming very soon.
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Today's Featured Article - Show Coverage: Journey to Ankeny - by Cindy Ladage. We left Illinois on the first day of July and headed north and west for Ankeny, Iowa. Minus two kids, we traveled light with only the youngest in tow. As long as a pool was at the end of our destination she was easy to please unlike the other two who have a multitude of requirements to travel with mom and dad. Amana Colonies served as a respite where we ate a family style lunch that sustained us with more food than could reasonably fit into our ample physiques. The show at Ankeny
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