Try again. The knock you're hearing when an engine pings is 2 flame fronts colliding. One being set off from a hot spot like a glowing piece of carbon, the other from the spark plug. Octane has no effect on burn time. Clean out the EGR passages of that 460 and she won't ping on 87. Thats one of the benefits of EGR. That old 460 only has an EGR valve position sensor and can't actually tell if there is enough flow.
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Today's Featured Article - Talk of the Town: The Pefect Collection - by Staff. Another neat discussion from the Tractor Talk Discussion Forum. The discussion started out with the following post: " I thought it would make for some interesting discussion for many of you to post what would be considered your dream or perfect antique tractor collection of five tractors, assuming room for storage and cost were not a factor. I have posted my "Perfect Collection" on the Farmall board. List any brand preference but keep
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