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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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  #11  
Old 06-20-2010, 05:15 PM
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Quote:
Originally Posted by chefred112 View Post
I found that after all these years that havin the fan in an 'always' on (10 percent) works best for me...I like the security knowin the fan is workin (I've run into situations before where the fan dint come on and the truck overheated)... so now i have it wired to always on and carry around the pulley fan as well.

Better to have it and not need it than to need it and not have it!
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  #12  
Old 06-20-2010, 05:54 PM
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why is an electric fan better than the stock motor mount?
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  #13  
Old 06-20-2010, 08:31 PM
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i bu it later on tell u
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  #14  
Old 06-20-2010, 09:19 PM
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Quote:
Originally Posted by PorkChop View Post
why is an electric fan better than the stock motor mount?
Fan clutch robs the engine of power. You dont make more power switching to efans, but your engine will transfer more power due to not having to turn the big fan clutch.

Also, efans can run full bore at idle, whereas a fan clutch is limited to the engines RPM.
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Old 06-20-2010, 09:58 PM
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What he said ^^

efans just reduce the parasitic losses from your accessories, just like an underdrive pulley since they then turn slower requiring less torque from your crank.
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Old 06-20-2010, 10:58 PM
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ok...but what about the draw of power? if you have upgraded stereo, would on ehave to look at doing a duel battery set up with an oversized alternator?
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Old 06-20-2010, 11:06 PM
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The efan does not draw that much power man lol. Cars come with them stock, hense the Taurus and Mark 8 fans were talking about.

I think the two of them have the same cfm rating so I guess the Taurus one it is! I am going to have it running on all the time I think anyways. I just feel a lot safer knowing that it is on all the time.

The Flex-a-lite I am sure is really good. It is just the price difference haha. The Flex-a-lite is like $250 and the Taurus fan is like $40 haha.

Thanks for the replies guys!
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Old 06-20-2010, 11:12 PM
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Do you have CFM and static pressure numbers on the Taurus fans vs. the Flex-A-Lite? I know in Ontario, it wont be nearly as big of a deal, but someplace hot like Vegas it could matter alot.
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Old 06-20-2010, 11:28 PM
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Some PICS of a Taurus e-fan installed on a RAM would be nice!
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  #20  
Old 06-21-2010, 01:42 AM
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for those of you needing detailed info on the MarkVIII or Taurus fan...

Considered to be the most powerful electric fan you can use from either OEM or the aftermarket. It is a Ford 8C607 fan and is advertised as having 2500 CFM on low speed and 4500 CFM on high by most sources. It comes in the 90 to 95 Ford Taurus and Lincoln Mark VIII with the 3.8 litre engine. Is very popular with the Hot Rod and Muscle crowd as well as used in Offroad buggies etc.


The Mark VIII fan has 2 speeds - 3 wires. The outboard black lead (uppermost pin on the motor if you do not have the pigtail) is the ground (negative). The blue lead (lowermost pin on the motor) was used to activate the fan when the AC was turned on (positive). The center lead (also positive) is black. It was activated by engine temp. I understand that using the black/black combo will give you a higher fan speed than the black/blue combo.

3 Leads; 2 are positive (+) leads and 1 is a ground lead.

Lead functions in stock application:

-BLACK Outboard black lead is a GROUND.

+BLACK Center lead is a POSITIVE lead...actuates fan on engine temp.

+BLUE Outboard lead is a POSITIVE lead..actuates fan w/ aircon.

================================================== =
The Taurus fan is a 17" diameter fan and the MarkVIII is an 18" fan. They share the same motors, and the shrouds are different. The Taurus fan has an angled edge and the MarkVIII is a rectangle shroud.

MarkVIII
1993-96 #F3LY8C607A low speed 1100RPM high speed 1850

1997 #F7LZ8C607AB
1998 #F8LZ8C607AA low speed for 97/98 1800RPM high speed 2225

================================================== =
The Taurus, T-Bird, and Lincoln e-fans all use the same motor. The only difference is the blade size - 16, 16.5, 17, 17.5, and 18-inch fans and each have the same three wire configuration.

On the newer fans, you might thing you have a problem if you just apply power to each of the Black wires. On the newer fans, the low speed wire is connected to the side of the plastic housing and the second is the high-speed wire. The speed of the newer model fans is controlled 100% by the EMC. The ECM modulates the voltage to the high speed wire and this gives the e-fan its variable speeds. This give the ECM full control of the e-fan from whisper quit to full power for max-cooling. The ECM modulates the water temperature for best performance and fuel economy for the engine.
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