max rpm for stock fan

[dvav]

just wondering what a safe max rpm is for stock 7 blade clutch fan on a 340 . and is there any real benefit to adding an aluminum rad if the stock one keeps it cool

 

[C130 Chief]

Because of clutch slippage and air load on the fan, it will tend to turn only just so fast. I would think 6000-6500 crank RPM is probably reasonable for short periods.

If the stock radiator keeps the engine cool then I wouldn't think there's any point in replacing it. Some might argue that the aluminum radiators are lighter, and perhaps they are until you fill them with water.

 

[krazykuda]

The clutch should disengage at higher rpm.


If your current radiator isn't having any problems, why do you want to spend unnecessary money to fix something that isn't a problem?


If you want to throw away money, I'll PM you my address....

 

[teringer]

I used a 7 blade on my 360 stock car with stock pulleys turning 7200 rpm for 45mins at a time for 5 years with to problems ,no loosing of the fan blades or stock water pump issues.

 

[dvav]

thanks I wont be to worried about winding it up now