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New Edge Cobras
N/A 4v build
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<blockquote data-quote="IUP99snake" data-source="post: 9120721" data-attributes="member: 7060"><p>I saw a neat article in an engine builders magazine about this. They built up a N/A 351 big bore 4V modular motor based on an aluminum GT block. Their attention to detail in the rotating assembly played a large part in making over 550 HP N/A on the dyno. </p><p> </p><p>The biggest thing they did to the rotating assembly was shave down the counterweights on the crankshaft, which not only reduced rotating weight but significantly reduced oil windage losses. They also massaged the oil passages for the main bearings and polished the crank. </p><p></p><p>Lightweight internals certainly adds horsepower. The new Corvette ZR1 uses a titanium valvetrain. I've seen some people run hollowed out camshafts in their modular motors for reduced rotating weight. It all adds up.</p></blockquote><p></p>
[QUOTE="IUP99snake, post: 9120721, member: 7060"] I saw a neat article in an engine builders magazine about this. They built up a N/A 351 big bore 4V modular motor based on an aluminum GT block. Their attention to detail in the rotating assembly played a large part in making over 550 HP N/A on the dyno. The biggest thing they did to the rotating assembly was shave down the counterweights on the crankshaft, which not only reduced rotating weight but significantly reduced oil windage losses. They also massaged the oil passages for the main bearings and polished the crank. Lightweight internals certainly adds horsepower. The new Corvette ZR1 uses a titanium valvetrain. I've seen some people run hollowed out camshafts in their modular motors for reduced rotating weight. It all adds up. [/QUOTE]
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