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Cobra Forums
2013-14 Shelby GT500
Just got a motor build quote and have questions
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<blockquote data-quote="Bad Company" data-source="post: 15730743" data-attributes="member: 141815"><p>It all depends on the Hp goals of the engine. As Hp increases so do the harmonics from the individual cylinders firing and how those cylinder impulses effect the crankshaft. You need to control these harmonics across the entire engine RPM range or the crankshaft will eventually break and take out the block with it. A 900 Hp engine spinning 7000 RPM has a lot less harmonics being introduced to the crankshaft than a 1400 Hp engine spinning 7000 RPM. A SCJ crank is cheap during the initial build, but a new block and crank is expensive at a later date when compared to installing a billet crank in the first place. Plus with the billet crank the snout will handle the big superchargers needed to achieve the bigger Hp goals with ease</p></blockquote><p></p>
[QUOTE="Bad Company, post: 15730743, member: 141815"] It all depends on the Hp goals of the engine. As Hp increases so do the harmonics from the individual cylinders firing and how those cylinder impulses effect the crankshaft. You need to control these harmonics across the entire engine RPM range or the crankshaft will eventually break and take out the block with it. A 900 Hp engine spinning 7000 RPM has a lot less harmonics being introduced to the crankshaft than a 1400 Hp engine spinning 7000 RPM. A SCJ crank is cheap during the initial build, but a new block and crank is expensive at a later date when compared to installing a billet crank in the first place. Plus with the billet crank the snout will handle the big superchargers needed to achieve the bigger Hp goals with ease [/QUOTE]
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2013-14 Shelby GT500
Just got a motor build quote and have questions
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