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2013-14 Shelby GT500
Thinking About Monoblade
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<blockquote data-quote="Catmonkey" data-source="post: 15544973" data-attributes="member: 124025"><p>Apparently Ford Performance rates the CJ 65mm at 1,517 CFM and the SCJ mono at 1,797 CFM. Difference is 280 CFM, so that info wasn't far off.</p><p></p><p>I also came across info that L&M rates its 66mm twin at 2,000 CFM and the 72 mm twin at 2,500 CFM. Clearly they're using a different pressure drop to measure CFM than Ford Performance and everyone else in the industry.</p><p></p><p>Whipple has a 68mm twin and 71mm twin it rates at 1,630 CFM and 1,755 CFM, respectively. </p><p></p><p>Kenne Bell rates its 75mm twin at 1,880 CFM. They also indicate the stock TB flows 1,128 CFM.</p><p></p><p>To put it all in perspective, a TVS with a 2.4" upper, a 15% lower and an engine turning 6,500 rpm (blower rpm of 21,992) would generate 1,786 CFM, which assumes 100% efficiency and that the case and/or elbow can flow that much air. </p><p></p><p>For the pump gas guys, a TVS with a 2.4" upper, stock lower on an engine turning 6,500 rpm would generate 1,562 CFM. That's not to say a larger twin TB wouldn't make more horsepower than the CJ 65mm, but there comes a point of diminishing returns.</p></blockquote><p></p>
[QUOTE="Catmonkey, post: 15544973, member: 124025"] Apparently Ford Performance rates the CJ 65mm at 1,517 CFM and the SCJ mono at 1,797 CFM. Difference is 280 CFM, so that info wasn't far off. I also came across info that L&M rates its 66mm twin at 2,000 CFM and the 72 mm twin at 2,500 CFM. Clearly they're using a different pressure drop to measure CFM than Ford Performance and everyone else in the industry. Whipple has a 68mm twin and 71mm twin it rates at 1,630 CFM and 1,755 CFM, respectively. Kenne Bell rates its 75mm twin at 1,880 CFM. They also indicate the stock TB flows 1,128 CFM. To put it all in perspective, a TVS with a 2.4" upper, a 15% lower and an engine turning 6,500 rpm (blower rpm of 21,992) would generate 1,786 CFM, which assumes 100% efficiency and that the case and/or elbow can flow that much air. For the pump gas guys, a TVS with a 2.4" upper, stock lower on an engine turning 6,500 rpm would generate 1,562 CFM. That's not to say a larger twin TB wouldn't make more horsepower than the CJ 65mm, but there comes a point of diminishing returns. [/QUOTE]
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Thinking About Monoblade
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