Efan revisited
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Mountain Pass
Joined: Apr 2010
Posts: 118
Likes: 3
From: Manhattan, KS
Efan revisited
I have searched this but have not found an answer First I have an 06 Scab 5.4 4X4. I am thinking about putting in an efan(Imagine that that is what the title says 
) Anyways looks like most use a dual fan setup. I was thinking about using a 2 speed fan an retain the factory shroud. Any gains or losses to this setup? I know only one fan no back up etc. What kind of fuel efficiency gains has everyone seen from swapping to an efan? I was also thinking of underdrive pulleys any gains there? truck is completely stock just wanting to make it a bit less thirsty. I have yet to check mileage, but will here with in the next couple tanks. I would consider an exhaust but I'm getting old and don't like loud anymore!
) Anyways looks like most use a dual fan setup. I was thinking about using a 2 speed fan an retain the factory shroud. Any gains or losses to this setup? I know only one fan no back up etc. What kind of fuel efficiency gains has everyone seen from swapping to an efan? I was also thinking of underdrive pulleys any gains there? truck is completely stock just wanting to make it a bit less thirsty. I have yet to check mileage, but will here with in the next couple tanks. I would consider an exhaust but I'm getting old and don't like loud anymore!
Laughing Gas
Joined: Dec 2009
Posts: 799
Likes: 13
From: East L.A.
Some claim there are 1 or 2 mpg to be had. Also the set-up will be quieter. It can't be bad...almost every vehicle made these days has an electric fan. I've been following a couple different threads about this and I'm probably going to use the new 2010 F-150 e-fan.
Senior User
Joined: Oct 2004
Posts: 372
Likes: 0
From: Paola
II have a dual fan setup, im getting about 2 mpg more, the air conditioner seems to blow a little colder, there's way more room under the hood without the fan shroud which is good for changing oil filter.
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