Fan CFM

[MOhorsePAR]

Does anyone know the CFM rating of a stock 6 blade fan clutch unit? I want to replace mine with a electric one, but wonder just how much air did the factory one move? I am assuming that the "bigger the better" when it comes to CFM of an electric fan.

Thanks,
Steve / MOhorsePAR

 

[player1up]

Does anyone know the CFM rating of a stock 6 blade fan clutch unit? I want to replace mine with a electric one, but wonder just how much air did the factory one move? I am assuming that the "bigger the better" when it comes to CFM of an electric fan.

Thanks,
Steve / MOhorsePAR

I went with an electric to save some HP on my /6.
Not so sure of the CFM on a stock fan, But somethimes bigger can cause more dominoes to fall. I run a 3500+ CFM fan from a taurus (2 speed) and at high speed it will just about kill the car, dim headlights, blinkers no longer flash and the radio would sometimes turn off. I have since upgraded to a 90A denso alt. Take a look at my DIY radiator thread, the old 2 core rads cooling was fine for idling even with 85% blockage..

 

[rumblefish360]

I gota Perma cool unit on my ride. They advertise there CFM ratings and bigger isn't allways better. It is a cfm and amp drawback sometimes.

 

[mullinax95]

You will need a minimum of 3000 CFM for a small block.

 

[tensec340]

You want the widest one that fits over your cooling tubes,I highly suggest twins fans with flaps in the shroud that holds themif you have the $$, You want a puller NOT PUSHER, as for cfm's the more the better but search for one that has an amp draw under 12 I know summit has there brand fans around 3000 cfm,s and only pulling 8 amps or so !
also, straight blades not curved!