SPAL 0402 6.5" straight blade puller low profile 325cfm W300 Pickup Why is increased flow so

Why is increased flow so important to cooling a hot 281 engine

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9L ford e-150 econoline club wagon 76-75 L6 300 4

SPAL 0402 6.5" straight blade puller low profile 325cfm W300 Pickup Why is increased flow soSPAL Part Number: 30100402 A22 AP11 C 50A UPC: 816211020177 Fan CFM Range: 300 399 Maximum Fan CFM: 325 cfm Fan Quantity: Single Fan Diameter (in): 6. 500 in. Height (in): 7. 015 in. Width (in): 7. 015 in. Thickness (in): 2. 031 in. Number of Blades: 10 blades Blade Material: Plastic Blade Color: Black Shroud Color: Black Shroud Material: Plastic Air Conditioning Relay Included: No Mounting Brackets Included: No Mounting Hardware Included: No