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Electric fan placement for max cooling? #2501003
05/27/18 02:38 PM
05/27/18 02:38 PM
Joined: Aug 2009
Posts: 272
Portland, Oregon
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Digger73 Offline OP
enthusiast
Digger73  Offline OP
enthusiast
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Joined: Aug 2009
Posts: 272
Portland, Oregon
I am installing a pusher fan and was wondering if there is a preferred place for max cooling? Should I bias the fan toward the inlet or the outlet of the radiator? I have a theory just want to hear from others.
Yes I know that a puller fan with a shroud is best but in my situation there is no room on the engine side.

Thanks,
Digger73 (Mike)


I live with fear everyday but, sometimes she lets me race!
Re: Electric fan placement for max cooling? [Re: Digger73] #2501007
05/27/18 02:58 PM
05/27/18 02:58 PM
Joined: Jun 2003
Posts: 51,034
Romeo MI
MR_P_BODY Offline
Master
MR_P_BODY  Offline
Master

Joined: Jun 2003
Posts: 51,034
Romeo MI
You dont need to bias it.. just make sure it
isnt restricted
wave

Re: Electric fan placement for max cooling? [Re: Digger73] #2501010
05/27/18 03:09 PM
05/27/18 03:09 PM
Joined: Aug 2009
Posts: 272
Portland, Oregon
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Digger73 Offline OP
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Digger73  Offline OP
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Joined: Aug 2009
Posts: 272
Portland, Oregon
Thanks Mr_P_Body.
No restrictions. There is plenty of space in front of the radiator just no place for the fan on the engine side.

Digger73 (Mike)


I live with fear everyday but, sometimes she lets me race!
Re: Electric fan placement for max cooling? [Re: Digger73] #2501275
05/28/18 11:37 AM
05/28/18 11:37 AM
Joined: Sep 2003
Posts: 10,349
north of coder
moparx Offline
Dreaming of implants
moparx  Offline
Dreaming of implants

Joined: Sep 2003
Posts: 10,349
north of coder
this may seem odd, but i have tried the bias of a pusher fan on several different installs toward the inlet, then the outlet. some have had no difference, some have favored the outlet over the inlet, some the opposite. this makes me think airflow coming in the grille, and how well the hood/radiator seal is, affects the results. your mileage may vary.
beer

Re: Electric fan placement for max cooling? [Re: Digger73] #2501289
05/28/18 12:34 PM
05/28/18 12:34 PM
Joined: Oct 2008
Posts: 835
East Coast
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A/MP Offline
super stock
A/MP  Offline
super stock
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Joined: Oct 2008
Posts: 835
East Coast
Not very scientific but I watched with an infrared hand held gun and there usually seems to be a turbulence hot spot on the radiator. This seems not to differential between copper or aluminum radiators. Placing a fans air projection at that spot solved some overheating issues. Looking at some of the 4 and 6 cyl newer motors ans it is very interesting that the radiator is almost as small as the A/C condenser. These motors are designed to run at that 190*-195* realm.Is it time to re-think cooling on drag cars?

Re: Electric fan placement for max cooling? [Re: Digger73] #2501298
05/28/18 01:06 PM
05/28/18 01:06 PM
Joined: Oct 2007
Posts: 3,088
New York
polyspheric Offline
master
polyspheric  Offline
master

Joined: Oct 2007
Posts: 3,088
New York
airflow coming in the grille, and how well the hood/radiator seal is, affects the results

This^^^


Boffin Emeritus
Re: Electric fan placement for max cooling? [Re: Digger73] #2501854
05/29/18 05:07 PM
05/29/18 05:07 PM
Joined: Jan 2003
Posts: 893
Oregon
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earlymopar Offline
super stock
earlymopar  Offline
super stock
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Joined: Jan 2003
Posts: 893
Oregon
The ideal condition with a pusher fan is to make sure your radiator is well over-sized to accommodate that you're blocking air flow with a front-mounted fan.

- EM


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