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4,000 CFM Fan Kit Recommendation for 1974 Chevy Corvette with 502 Cubic Inch Big Block

Question:

I have a 502 big block engine in a 1974 corvette and was looking at one of the dual fan systems with at least 4000 cfm or greater and I have a march pulley system very little room in front was wondering which fan system you’d recommend I have a pusher fan now but doesn’t seem to have enough cooling power thx

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Expert Reply:

The shallowest fan setup we have that can move 4,000 CFM of air would be the Derale High Output Fan and Shroud part # D16928 as it measures only 3-1/4 inches deep. Height and width though are 28-5/8 inchs and 13-7/8 inches.

If you need a smaller height and width but can get by with a slightly deeper setup we have the Derale part # D16826 as well.

This measures 25-5/8 inche wide x 17-1/8 inches tall x 4 inches deep.

Having either fan setup as a puller instead of a pusher will get you the best cooling capacity. Running distilled water in the cooling system during the summer months can help quite a bit too.

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Jameson C

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