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Compared to the "street/strip" P-1SC-1, the F-1A-94 blower has a higher max boost rating, (from 32 psi to 38 psi), more max airflow (from 1,200 cfm to 1,625 cfm), larger internal step-up ratio (from 4.10:1 to 5.40:1), and a higher horsepower rating (from 825 hp to 1,300 hp). Just what we need to get into the 8s.