I installed the Flex-A-Lite #1818 7-Blade Mechanical Flex Fan on the Grand Prix tonight Grumpy.
Just test fired it 20 minutes ago.
I had the drivers door open on the Grand Prix & my head hanging out watching as I hit the ignition key.
The Olds 425 fired right off & I was immediate blasted in the face with cool night time air.
The New #1818 Fan is ineradicable.
It puts out at least 50 times more air flow than the Flex-A-Lite #398 Cyclone 2,500 CFM rated electric fan previous used.
The same #398 Fan is on the 1987 C4 Corvette.....Electric fans just suck.
I revved the engine up hitting the gas & it redlined effortless like no Fan is on the engine still.
Likely because a true 470 ft/lbs torque is there with the 425 Olds.
Wife came out & started yelling....she was putting the kids to bed.
Open exhaust still.
LOL
I have to make a New You Tube video....show how much air that 1818 7-blade fan is kicking out at idle 650-700 rpms & then revving it up hard.
Just Holy Crap....
Like a Semi Truck Diesel Engine Fan.....