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Custom Dodge Ram Performance Mods - Engine - 5.7 HEMI V8 Discuss modifying your Dodge Ram with Performance Parts and Accessories!
Factory Spec: 5.7-liter HEMI® V8 engine - 390 horsepower, 407 lb-ft of torque.


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  #1  
Old 09-10-2011, 02:01 PM
NewMexicoRam NewMexicoRam is offline
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Has anyone removed their stock fan and replaced it with a, "flex-fan" in the interest of reducing fan drag? Did it affect your cooling at all?
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Old 09-11-2011, 02:02 PM
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yes it does free up a little horse power. i have not done it to my current truck yet. but i have done it to all my mudd trucks for example i replaced my stock fan with an electric fan on my 350 small block and it freed up a little, i allso did it on a toyota and got a decent improvment and on my brothers f150. but the important thing to realize is that your not going to build HP doing this your only going to free up the HP your motor already puts out. youll feel it in the throttle. it will feel like it responds better...i am going to do this to my truck when i have the extra money...i hope this answers your question
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Old 09-11-2011, 02:26 PM
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most replace their mech fans with e-fans along with a 180 degree t-stat. Flex-a-lite, Lincoln MK VIII and Taurus fans are all popular choices.

have not seen anyone install a flex-fan.
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Old 09-11-2011, 02:28 PM
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what do yall mean when yall say flex fan?
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Old 09-11-2011, 03:35 PM
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The fan blades flatten out as the rpm's increase, aka flexible. You just have to make sure you get the reverse rotation one for a serpentine belt drive system.
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Old 09-11-2011, 05:20 PM
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Isnt the stock e-fan sufficient enough?
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Old 09-11-2011, 07:26 PM
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Quote:
Originally Posted by kay9 View Post
Isnt the stock e-fan sufficient enough?
that's how mine is. stock e-fan, 180 t-stat, lowered my fan on/off settings with the Diablo programmer.
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Old 09-11-2011, 09:56 PM
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I believe my truck has an e-fan that comes on with the AC. Then it also has the regular fan blade. My thought was not so much for extra power as it was for thinking about reducing some drag and possibly gaining a bit of MPG's ?????
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Old 09-11-2011, 10:21 PM
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Quote:
I believe my truck has an e-fan that comes on with the AC. Then it also has the regular fan blade. My thought was not so much for extra power as it was for thinking about reducing some drag and possibly gaining a bit of MPG's ?????
Your stock efan does come on with the AC. It also comes on at a certain temp (I believe it's very high like 222 deg) so it basically wouldn't come on unless you are overheating. What many people do is remove the mechanical clutch fan and install a 180 degree thermostat, and then use a tuner to adjust the efan on temp down closer to 180 from the stock 222 or so. I think the flex fans don't work well personally....the stock clutch fan is supposed to work better actually as the clutch should release if working properly....but I don't have personal experience with the flex fans
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