school me on cooling fans

[Cornfield creations]

I have the stock clutch fan. It seems to not be pulling enough air through the radiator to keep my new engine cool enough. Would a flex-a-lite straight fan do better with the spacer to put it closer to the radiator?

What are the pros and cons on a straight fan?

Would an aux. electric pusher fan help any?

 

[buefchris]

What type of truck ? Is there a radiator cowling ? Is the clutch fan new? Did you change your axle gear ratio?

 

[Cornfield creations]

its a 79 k-5, I had a stock 350 in it that always cooled real well. Newer 4 core radiator, new heater core. I just put in a 350 ho, and it runs a little warmer than I'd like. I know when it gets hot outside and running AC its gonna run hot. The clutch fan is older but still has good drag and is tight.

I was just wondering if a straight fan would draw more CFM through the radiator, and what are the down side to running a straight fan?

 

[mr.smartass]

If you've got a little spare cash do what I did and slap 2 14" electric fans on it with a temperature switch and call it done... add a toggle switch if you plan on doing water crossings.