Rad Fan

[knucksfirst]

Anyone ever replace Fan with these electric fans.... does it actually free up 15hp??

 

[ThatGuy]

If you combine it with a $6 ebay chip, a tornado, electric supercharger, and a shot of methanol you should be good for about 125-150 horsepower.

 

[James86]

The ones with efans seems to like them, but when you snag a taurus fan or something from a junkyard and only have maybe $50 into the whole project, you'll probably be more satisfied than if you got a $200+ kit. Disregard the sarcasm best you can, and sift through the responses to see who's actually run them and who's satisfied with them. It's not going to free 15HP, but you might notice a slight difference. Anything wrong with the fan you have now?

 

[ThatGuy]

I have a taurus fan on mine. Not for power gains but to be able to control the fan. I have it set so it comes on low speed with the thermostat, I can switch it off manually, or switch on hi speed manually. Works great in the woods but if your looking for horsepower, look somewhere else.

 

[bobbywalter]

its 100 percent way to free up some power.


not enough to notice for most, its dependant on actual drive cycle conditions and climate as to any actual mpg gains or not..

it also requires proper installation through sensors and relays. this is where it can be a great mod or bring headaches

i use them for power efficiency and control.


oh..

the oem fan dont use 15 hp. there are many oem styles and the 90 b2 2.9 ac runs about 8 hp max corr hot hot and margins with the rad blowers on at normal eng op temp..

have not tested a later 4.0. all the guys building and dyno tuning/testing maybe some of them can be bothered to get some donated runs from tuners to check.

 

[scotts90ranger]

fans can take up to like 10hp from what I hear at work (one former GM engineer, and a few dyno guys) but that's with a fixed fan not a clutch fan. A properly functioning clutch fan will probably take about the same amount of power to run as an electric one if I had to make a guess, although since you can turn the electric one off it'll be a little more efficient...

 

[bobbywalter]

fans can take up to like 10hp from what I hear at work (one former GM engineer, and a few dyno guys) but that's with a fixed fan not a clutch fan. A properly functioning clutch fan will probably take about the same amount of power to run as an electric one if I had to make a guess, although since you can turn the electric one off it'll be a little more efficient...

no a clutch fan can take up to 40 hp in a diesel application.

a regular clutch fan like the m7 will take up to the teens, and the one on my 6.5 is teens too. this is engaged to its fullest possibility...80-90 percent lockup generally speaking.....


all the way loose/disengaged...say 10-20 percent lockup is at least 1hp in general as a base. it varies naturally, and i see some ridiculous testing methodology everywhere thats outrageous and i have been pmed' to death on the subject.

my fans rarely run in normal use...and dont even pull over 1 hp in high..

on a decent power engine its a non issue...on a 100 hp engine thats getting its ass whooped it can really help.

cruise rpm i was tearing belts up and costing serious mpg with a 17 in flex fan years ago when i went to an aod...driving up to 80+k a year is allot of cruising...i went through the whole 9 and found the electrics the most sensible.

improperly setup though they can really hurt a guy...

 

[James86]

I know some people will say that an electric fan will rob power because it puts a load on the alternator, but I call BS because I can't say my power has decreased or my mileage dropped from running a set of subs and they probably draw more power at my listening levels that an electric fan does once it has started. I've had subs in every vehicle I've ever owned and my intrepid was the same with a decent Aiwa deck and a 1200W amp powering a pair of subs as it was bone stock. No increased draw on engine, no loss of power, nothing. And intrepids already have TWO e-fans.

Just my $.02 worth of logic...

 

[doorgunner]

my ramble.....the engine will have a LITTLE more pep--if you have a good tach, you would probably notice a slight increase in rpm's (I have a non-computer carbed V-8 engine...the biggest change I got was switching to a manual steering box...the throttle response was noticeable--it was a little easier to spin the tires when it hit second gear...LOL)

like bobbywalter said---iif you only have about 100 (to 150 hp) to start with, you'll be doing the engine a favor switching to electric fans--just make sure you get fans that floww about 2,000 cfm or more to get enuff cooling air.

 

[DaveThePear]

I've been considering this mod. My water pump is leaking (bad gasket), the clutch on the fan is nearly locked up (I can barely move the fan with the engine off) it sounds like a jet, and the plastic fan itself isn't in great health. I figure that new it's roughly $130 to replace with the same fan and clutch from NAPA, the 95 Taurus fan assembly is $130 http://www.napaonline.com/Search/Detail.aspx?A=BK_8552143_0166876322&An=599001+101995+50026+2026029

I know that it's eating fuel unnecessarily at the moment, not to mention adding wear, so I might as well go with the conversion. Some cussing, a few relays and some wire... meh.