What are yall using for radiator fans?

[71DodgeDemon340]

Any one use the flex a lite fans? Do they actually work? Also ive seen some nylon ones rated to 8,000 rpm. Anyone have any instight or advice

 

[goldduster318]

You'd be far better off with a clutch fan if you insist on a mechanical fan. Fan is all steel, and it will slip at high RPM so it won't come apart and launch through the hood or radiator.

 

[tekslk]

x2

 

[71DodgeDemon340]

Hmmmm could you point me in the right direction of one? Also im using a fan spacer will that matter? What rpm range does it slip?

 

[BlueDream]

http://www.manciniracing.com/maracofanblk.html

 

[71DodgeDemon340]

How does it bolt to the water pump? Also why is it called a thermal clutch fan?

 

[threewood]

I have a flex a lite fan and thermal clutch. Fan has a steel center section, aluminum blades. 6 blade, looks like an old stock unit minus 1 blade. Rated at 4000rpm, with the thermal clutch keeps it cool and should free up some horsepower over a fixed blade.

I have no real world experience with the flex blade fans although I have heard they use more hp to turn.

 

[mguner]

I run and have run the black one piece flex-a-lite fans with no issue other than noise (which is not an issue on a hot rod) in several cars that bounced the tach off 7000. Just make sure your pulley ratio is not going to over rev the fan.

 

[TylerW]

I went to the junkyard and got a thermal clutch fan from an '85 Chrysler Fifth Avenue. I replaced the clutch itself with the part# for that vehicle and it fits and works great.