Clutch fan vs derale single 2400cfm fan

Had a 7 blade clutch fan on my 1974 Charger SE. At 5,000 RPM it sounded like a P-51 Mustang. Bought the DC 5 blade unit and it knocked the sound down a lot. And my gas mileage went from 16 to 18 MPG commuting to Ft Lewis every day.

I have a dual Hyden 26 inch wide electric with dual controls and stepped speeds. On my sons 71 383, 4bbl, 10.5:1, Hughes Cam, shorty headers in his 74 Dodge D-200 727 it never gets above 195F, what the thermostat is. With an open air cleaner the fans cycle on a lot, even doing 25 MPH. Run two dryer vent expanding hoses under the bumper to a 72 Road Runner's dual snorkel air cleaner and the fans never cycle while driving and very slow cycling idling.

Maybe the OP is sucking HOT underhood air in. Leave those chrome OPEN RACECAR air cleaners to the DORF and CHEBBY folks.

I had the same issue with the 383 in my 1965 Barracuda. No where for the hot air to escape and the open air cleaned would peculate my carb. Dual snorkel fix it.