I'm looking to specifiy some requirements for a custom IC core and I'm having a difficult time figuring out how much CFM is required for given HP levels.
With current technology it looks like 500rwhp street SCs running I assume 20psi of boost will be a possibility so lets use that number for now.
One CFM rule of thumb I've seen is approximately 1.5 CFM per crank horsepower, I assume this is at some "nominal" temperature and pressure that was not given. So with 25% drivetrain losses and 50Hp to drive the blower I've got. (500 * 1.25) + 50 = 675 Hp or 675 * 1.5 = 1012 CFM.
I assume that number would be the CFM required and the intake to the blower.
Another way to look at CFM is the swept volume of the motor. The motor is 232 cubic inches and displaces that much charge air every two revolutions so at lets say 6500 rpm the motor moves: (6500 * 232)/3456 = 436 cfm.
The 3456 number is a conversion from ci to cf plus the adjustment for moving air every 2 revolutions.
With current technology it looks like 500rwhp street SCs running I assume 20psi of boost will be a possibility so lets use that number for now.
One CFM rule of thumb I've seen is approximately 1.5 CFM per crank horsepower, I assume this is at some "nominal" temperature and pressure that was not given. So with 25% drivetrain losses and 50Hp to drive the blower I've got. (500 * 1.25) + 50 = 675 Hp or 675 * 1.5 = 1012 CFM.
I assume that number would be the CFM required and the intake to the blower.
Another way to look at CFM is the swept volume of the motor. The motor is 232 cubic inches and displaces that much charge air every two revolutions so at lets say 6500 rpm the motor moves: (6500 * 232)/3456 = 436 cfm.
The 3456 number is a conversion from ci to cf plus the adjustment for moving air every 2 revolutions.
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