Thread: redline?
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Old 02-28-2011, 09:08 PM
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Location: Bainbridge Island, WA
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Sounds like a "mystery motor" to me. Not knowing anything about the build OR builder I wouldn't take any unknown past 5000-5500 rpm on a good day. Most any big block is comfortable at 5500-6000 rpm for max HP. Good luck.
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