Using round numbers we've seen five horsepower when adding a Moroso electric motor driving the water pump compared to a belt.
Twice we removed the fan and made a quarter mile pass and didn't not see anything noticeable with the time slip.
Many years ago Car Craft did a fan shoot out and one clutch fan wailed the crap out of every other fan they tried. Lots of folks ran out and bought that winning fan. Years later the Editor let the world know that the clutch was defective and never locked up causing the increase in power.
I think that was the same issue they let us know the secret about using Chapstick to keep Holley brown gaskets from sticking.
