Anyone know the CFM of the stock clutch fan?

[cobrAA]

quick question! :P

[DarkCaporaL]

The question was asked in the passed but I dont think anyone knew it, since it was never tested...to my knowledge.

[Dragon Humper]

My guess is about 4000cfm, which is why I still assert that a fully engauged stock fan will zap at least 15 to 20hp from your engine. Twin electric 14" fans rated at 2500cfm each should out do the factory one and only cost you 2hp in the process.

I don't count the AC pusher fan because it only comes on with the AC and when it does it blows air in the 90degC range at the rad and really doesn't help the situation at all in the heat-soak grid-lock of summer.



Jon.

[support@feastauto]

And dont forget that mechanical clutch fan is variable. So if its old then it may not be putting out much at all. Electrics is the way to go.