Electric fan
06-20-07, 10:47 PM
#1
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Electric fan
Fellas, I'm seeking some info regarding pushing and pulling fans. I would like to know if there is a difference in output between the 2. I've heard that most common type of fans are puller and that pusher fans lose about 20% of there CFM. How true could you guys say this statement is ?
06-20-07, 11:40 PM
#2
The only pusher fan I've ever seen on a rotary is an auxilliary fan of the TIIs that is an assist for the ac, if that tells you anything. Youwill always get more flow pulling air through a radiator than pushing, mostly because of the shape of the shroud.
06-21-07, 12:02 AM
#3
the fan i used in my 808 i'm sure was a puller. but with the combination of the 13b, along with an rx4 rad, there wasn't enough room to put the fan between the engine and rad. i put it on the grill side of the rad and wired it to blow thru the rad. i had no problems what so ever with it running hot.
06-21-07, 03:46 PM
#5
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I dont disagree with this but , shouldnt a good fan push enough anyway? I have always heard that after 35 mph a fan is really useless anyway because you are flowing more air then a fan can pull. Is this not correct? I might be way off here but thats what I always heard.
06-22-07, 09:43 PM
#7
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Electric Fan
Ok, here's the result from this little mod. 1ST I searched for a fan that will fit the measurement of my Rx-3 rad. I found one through Summit Racing. It's a 10" fan that flows 2350 CFM from Perma Cool. So, I received the fan today and immediately installed it as a puller as recommend for optimal performance. Now, everything is installed and the engine stays right around 160*. I even let it idel for a while and it went went up 5-7 degrees in temperature. So, at the end of this day i was a happy rotorhead ! Thanks for the heads up fellas..!
