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SVT Shelby GT500
IAT2 ranges 40-50* above ambient with HE/fans
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<blockquote data-quote="Bad Company" data-source="post: 15615654" data-attributes="member: 141815"><p>The simple way to know what the SC is moving in air by volume is to use a little math</p><p></p><p>Lets say the engine has a Eaton 2.3L SC on it with stock pulleys. </p><p></p><p>Damper pulley diameter is 7.5"</p><p></p><p>Upper pulley diameter is 2.71"</p><p></p><p>7.5 divided by 2.71 = 2.7675 drive ratio</p><p></p><p>The engine idles at 700 RPM </p><p></p><p>700 engine RPM x 2.7675 pulley drive ratio = 1937.2693 SC RPM</p><p></p><p>1937.2693 SC RPM x 2.3 Liter of air per revolution = 4455.7193LPM of airflow.</p><p></p><p>4455.7193LPM is divided by 28.316847 to convert LPM to CFM, which = 157.35223CFM</p><p></p><p>157.35223 CFM of air is what the rotors of the SC are trying to move while the engine is idling. </p><p></p><p>The next question would be how much air by volume is required by the engine to maintain the 700 RPM idle with no load? </p><p></p><p>Want to bet that it is less than 157 CFM? </p><p></p><p>In fact I'd say it only takes 60-70 CFM to maintain the idle speed of 700 RPM</p></blockquote><p></p>
[QUOTE="Bad Company, post: 15615654, member: 141815"] The simple way to know what the SC is moving in air by volume is to use a little math Lets say the engine has a Eaton 2.3L SC on it with stock pulleys. Damper pulley diameter is 7.5" Upper pulley diameter is 2.71" 7.5 divided by 2.71 = 2.7675 drive ratio The engine idles at 700 RPM 700 engine RPM x 2.7675 pulley drive ratio = 1937.2693 SC RPM 1937.2693 SC RPM x 2.3 Liter of air per revolution = 4455.7193LPM of airflow. 4455.7193LPM is divided by 28.316847 to convert LPM to CFM, which = 157.35223CFM 157.35223 CFM of air is what the rotors of the SC are trying to move while the engine is idling. The next question would be how much air by volume is required by the engine to maintain the 700 RPM idle with no load? Want to bet that it is less than 157 CFM? In fact I'd say it only takes 60-70 CFM to maintain the idle speed of 700 RPM [/QUOTE]
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IAT2 ranges 40-50* above ambient with HE/fans
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