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SN95 Cobras
Why de-burring works
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<blockquote data-quote="mwolson" data-source="post: 11479213" data-attributes="member: 16006"><p>Disclaimer: I am an electrical engineer, not a mechanical engineer, so an ME can probably shed even more light on this than I can.</p><p></p><p>But I think the primary break happened both due to the small cross section and the sharp inner corners. Both contributed.</p><p></p><p>But it is interesting to note that the secondary break didn't happen at the smallest cross section. If it had, it would have broken at the center of the half circle. Instead, it went to the sharp outside corner near the edge of the half circle.</p><p></p><p>And Boone, I did deburr my block, and my son's Honda block.</p><p></p><p>That said, I haven't seen too many Teksid blocks fail, even when they haven't been deburred. But I think it is good practice when you are building a higher HP engine.</p></blockquote><p></p>
[QUOTE="mwolson, post: 11479213, member: 16006"] Disclaimer: I am an electrical engineer, not a mechanical engineer, so an ME can probably shed even more light on this than I can. But I think the primary break happened both due to the small cross section and the sharp inner corners. Both contributed. But it is interesting to note that the secondary break didn't happen at the smallest cross section. If it had, it would have broken at the center of the half circle. Instead, it went to the sharp outside corner near the edge of the half circle. And Boone, I did deburr my block, and my son's Honda block. That said, I haven't seen too many Teksid blocks fail, even when they haven't been deburred. But I think it is good practice when you are building a higher HP engine. [/QUOTE]
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