Alshere59 Posted January 30, 2011 Report Posted January 30, 2011 So looking at changing my fan out. Currently have a 6 bladed fan with about a 5 1/2 inch pulley from a 55 230 engine. No shroud. 1950 Radiator boiled out with a 180 degree thermostat. Have a 160 also in case. I also have a 4 bladed fan and smaller pulley (4"?) from the original 217 engine. So I am wondering what would be my best options. Smaller pulley with the 4 bladed fan or the larger pulley with the 4 bladed fan? A shroud is on the agenda regardless. Also looking at flex fans or if I can find one that fits a thermostatic clutch fan. Looking at noise primarily next would be saving horse power. Cooling always. Thoughts from the forum? What are you running? Quote
thrashingcows Posted January 30, 2011 Report Posted January 30, 2011 My thoughts would be more blades, and a smaller pulley would spin it faster and equal more air flow. And definitely get a shroud, that alone would probably save you a lot of trouble. Going clutch fan...I don't know if there would be enough room between the water pump hub and the radiator for that. I don't like those flex fans, they are WAY too sharp! I have the scar on my hand to prove that, and it wasn't even spinning. Quote
Alshere59 Posted January 30, 2011 Author Report Posted January 30, 2011 (edited) Well I am looking at the noise as I have no problem with temperatures right now. So as fans are a big culprit when you are going down the road, why not get it a bit quieter if possible. Flex fans do have a reputation both for being sharp and coming apart. They come apart at high rpm though so with our flat 6's not a big problem. Edited January 30, 2011 by Alshere59 Quote
1941Rick Posted January 30, 2011 Report Posted January 30, 2011 How do you feel about a 10 blade 16" electric push fan on the front of the rad? Quote
hkestes41 Posted January 30, 2011 Report Posted January 30, 2011 I am running a 6 blade fan from a 53 Suburban with my home made fiberglass shroud. I didn't notice any real change in noise level when I switched from the 4 blade fan to the 6 blade. Felt like here in Texas I need all the air flow I can get for the 100 + days. Quote
Alshere59 Posted January 30, 2011 Author Report Posted January 30, 2011 (edited) How do you feel about a 10 blade 16" electric push fan on the front of the rad? I have considered a pusher with a temperature control. That way its not running all the time. Also it can run a minute or two after you shut it off to cool the engine. Having 6 volts may be an issue finding one. Is that what you are running? If so how is it cooling? I like your shroud. Seems like an easy enough build, thanks for the information. Running headers can you hear the fan? Edited January 30, 2011 by Alshere59 Quote
Don Coatney Posted January 30, 2011 Report Posted January 30, 2011 Are you trying to fix something that is not broke? Quote
1941Rick Posted January 30, 2011 Report Posted January 30, 2011 I am running 12 volt.....I have the fan on a switch and use it as required....slow driving around town when hot....works fine...... Quote
Alshere59 Posted January 30, 2011 Author Report Posted January 30, 2011 (edited) Are you trying to fix something that is not broke? Yep Like Putting on a dual carb setup or installing a T5 tranny or a 25" engine in a car made for a 23" and ......... Actually just trying to cut down on the noise some. Edited January 30, 2011 by Alshere59 Quote
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