Anyone have any idea what CFM an old Ingersoll Rand Type B pump would be ? It's 1954 and doesn't have any info on it , been offered a supposedly working compressor and this old thing was delivered - not working , tank no good as it's drain plug seems to be bodged up and the motor ( non original 2hp ) doesn't work - thought I might keep the pump if it's capable of over about 6cfm , as i've got another 150 litre tank that i want to couple up with a Sip 420/150 3hp compressor . I know it's unlikely but any ideas welcome .......answers on a postcard please...... Regards Al.