I'm looking at replacing my existing belt driven fan with an electric fan and must that I have looked at state that they can be set up to push or pull air thru the radiator - which is better. I would assume that pulling air would be better because the fan is protected by the radiator, but I thought I would ask.

Also, I'm looking at a single 16 in fan that move 1550 cfm - is that enough for my 5.4 l engine? I have a travel trailer that I pull, so I want to make sure I keep it cool enough.

Thanks -- Mark

 

The stock fan pulls air and most aftermarket ones pull just to due the fact that there is more room to mount it on the inside and it is more accessible.

Also remember the fan is off 99% of the time while moving.
Your stock fan has a clutch and you can really hear it when it is on and you accelerate. It sounds like a school bus then it quiets down after 10 seconds or so.

I am not sure you will see that big of an improvement with a electric fan. The #1 fix for high temps while towing is an after market multi-core alum radiator.

I have had no problems towing with my 5.4 out here in 115 deg Arizona weather and this is up very steep hills.


(make sure you have a tranny cooler)

 

I wasn't really looking for a reduction in temp - my temps run just fine. I'm changing it out for (hopefully) better fuel economy and HP. I just wated to make sure that the 1550 cfm was enough to keep the engine cool. I will use an automatic thermostat to switch the fan on and off - I'm afraid if I do it manually, I would not pay attention and over heat.

Thanks for your reply - Mark

 

Not sure if you would gain much hp or fuel economy since the stock fan freewheels 99% of the time while moving.

Most cars have the electric fans in addition to the stock fan to aid in cooling in traffic. My BMW 540 has a engine run fan but it also has the electric fans that kick in when in stop and go traffic, etc.

1550 cfm is not enough. If I remeber from a post a while ago, a Ford service guy posted some CFMS for the stock and they were 2200 at lower RPMS up to 3700+ for 3600+ rpms.

I would go with at least at 3000+ cfm.

 

Fans will work either push or pull, pullers are a little more efficient. You would be better off with a dual 16" set-up, first set to turn on at normal temp, the second fan would be set to turn on at about 205 deg and also hooked to the a/c.

You will gain a little mpg and hp due to getting rid of the drag and weight of the stock fan and clutch.

 

you want about 5000 cfm! give or take depending on conditions. pulling seems more common, easier to install.

 

What you need:
http://www.troyerperformance.com/cgi...alogno=PPI-EFK
Grim

 

After this post I am thinking bout a dual fan. Its already 100+ here in Arizona and my A/C works very hard in the stop and go traffic and is not that warm. On the highway its alaska like cold. I have read this setup would help a lot.:santa:

 

i just got the troyer dual 16" in and they are worth the money, and best price i could find. i will not get to install them anytime soon but i unwraped everything and i like what i see. good instructions and quality parts.

 

The single 16 in fan coupled with a 5.4 and towing will definitly not be enough. Even a super high flow 18 in like from a Crown Vic will be marginal. You don't want to skimp on something as important as engine cooling.
I have the Troyer dual 16 in setup. In Louisiana heat both fans have to run with the AC on in the summer time. A single 16 in would overheat, and I have the 4.6 and never tow anything.
With the Efans my gas milage went up about 1 mpg, power improved noticably also. Do a search here for some tips and tricks on installing the Efans.

Fritz