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Cobra Forums
2013-14 Shelby GT500
JDM Built 1200+HP rated 5.8L Trinity Shortblocks back in stock!!!
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<blockquote data-quote="Ben99GT" data-source="post: 15648310" data-attributes="member: 3519"><p>If it works for you guys, that's great. But you asked the question; I've seen a Manley H-beam wrinkled at less than 800rwhp. H-beam failures are also becoming fairly commonplace as power levels are climbing.</p><p></p><p>In fact, I know of one fairly well covered turbo 4.6 that lost his motor to an H-beam failure this month. </p><p></p><p>My opinion is this: The Manley H-beam is not a bulletproof 1200 HP rod. Sure under ideal circumstances they can live there but there is virtually zero engineering reserve at that level. </p><p></p><p>In the end the Manley rod is a light, sub-640 gram 6.657" rod with 3/8" rod bolts. The standard 6.657" Manley H-beam has less material in them than a stock 6.098" Gen IV LS rod. Add the 5.4's 4.165" stroke and the associated piston speeds (greater tensile loading on rod/bolts) and I'd prefer a more robust rod for a legit 1200 HP combo with expectations of longevity/durability. JMHO</p></blockquote><p></p>
[QUOTE="Ben99GT, post: 15648310, member: 3519"] If it works for you guys, that's great. But you asked the question; I've seen a Manley H-beam wrinkled at less than 800rwhp. H-beam failures are also becoming fairly commonplace as power levels are climbing. In fact, I know of one fairly well covered turbo 4.6 that lost his motor to an H-beam failure this month. My opinion is this: The Manley H-beam is not a bulletproof 1200 HP rod. Sure under ideal circumstances they can live there but there is virtually zero engineering reserve at that level. In the end the Manley rod is a light, sub-640 gram 6.657" rod with 3/8" rod bolts. The standard 6.657" Manley H-beam has less material in them than a stock 6.098" Gen IV LS rod. Add the 5.4's 4.165" stroke and the associated piston speeds (greater tensile loading on rod/bolts) and I'd prefer a more robust rod for a legit 1200 HP combo with expectations of longevity/durability. JMHO [/QUOTE]
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2013-14 Shelby GT500
JDM Built 1200+HP rated 5.8L Trinity Shortblocks back in stock!!!
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