Flex fan

Compared to what? I don’t do MTOD. We hate each other.
If i remember correctly (i saw the episode a while ago) they compared a clutch fan, aluminum flex, plastic flex, and factory fixed fans, to no fan at all.
Clutch fan did the best, memory says -10hp, alum flex -15, plastic flex -25hp, fixed -30 or 35 hp.
It got my attention cause i use the plastic fan that they tested. I made a concious decision to use it cause it keeps my engine cool. I used to play around with electric fans and water pump drives to save power on a bracket car. That is, till i figured out that the power i was supposed to be saving wasnt really there, cause the engine was too hot all the time.