[Half-Inch Stud]

Got 2 UpullIT Elec fans: 1 in GTO, 1 spare. Low setting doesn't help the Summer heat load. So wired for High Speed only.

Manual Turn-on thru Relay. Someday i will automate Turn on with the $11 Head Thermoswitch. Only needed at Stoplights on hot days and Summer highway. No mech fan.

High Setting helps completely; Been a Dozen years, Spare fan on Garage wall for when I turn 65 or so.

[1funride]

I dont want to start another, flex fan vs clutch fan vs Mark 8 battle, but I am curous how well a Flex-A-Lite 7-Blade Fan 116441 flows, if anyone has any idea?

Of course the flow would depend on engine speed, and at some point with blades bending over it would be maxed out. Seems an electric fan wuld be nice when stuck in traffic.

[lust4speed]

Originally Posted by 1funride

I dont want to start another, flex fan vs clutch fan vs Mark 8 battle, but I am curous how well a Flex-A-Lite 7-Blade Fan 116441 flows, if anyone has any idea?

Of course the flow would depend on engine speed, and at some point with blades bending over it would be maxed out. Seems an electric fan wuld be nice when stuck in traffic.

Your main problem is the 18" diameter which is a limiting factor in itself. Quite a difference in area between the 18" and 19.5" fans (255 vs 299 square inches). Holding everything else even, that's still a lot of volume gained with the larger fan. That said, I have a Hayden 7-blade 19.5" flex fan up on the shelf that I have run in the past and I'd say it was the equal of the mechanical 19.5" fan and clutch -- but the noise was terrible. It always sounded like there was a helicopter right over my car. Purpose of the flex blades is to have max cooling at idle and less horsepower draw in the upper RPM range when the blades flatten out. If I loose my hearing I would run it again, but until then I'll stay with the standard fan.

Also, it seems like only a 6 blade 19" flex fan is now offered which would reduce air flow with the smaller diameter and one less blade.

[AG]

Originally Posted by 1funride

I dont want to start another, flex fan vs clutch fan vs Mark 8 battle, but I am curous how well a Flex-A-Lite 7-Blade Fan 116441 flows, if anyone has any idea?

Of course the flow would depend on engine speed, and at some point with blades bending over it would be maxed out. Seems an electric fan wuld be nice when stuck in traffic.

I ran a Hayden severe duty clutch with a factory 7 blade fan on my '7s LeMans sport vert with a 9:1 CR 455 and stock 3 core radiator and the car would get to 210 °F idling in traffic with a 160 °F Tstat. I changed to a 7 blade Flex a lite SS fan and the car wont get above 170 °F on a 90+ °F day. I change the T stat to a 180 ° F and now it wont get above 175 °F on a 90+ day.