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  #1  
Old 06-06-2011, 10:02 AM
88ranger89camaro 88ranger89camaro is offline
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Default Factory or Flex Fan for towing

my ranger is a D.D. and also used to pull my boat and utility trailer, im sure my fan clutch is bad so i want opinions of if i should replace the clutch or get a spacer and a flex fan, dont really want a 12v fan due to the cost of an actually good high flow/qulaity one

main thing is the BEST COOLING when towing

thanks

88 Ranger 2.3 5 speed
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Old 06-06-2011, 06:09 PM
88ranger89camaro 88ranger89camaro is offline
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Default Re: Factory or Flex Fan for towing

BTW its $45 for a flex fan and spacer

and a new fan clutch is $43

also IIRC you can not use a fan spacer on the stock fan to avoid the clutch right
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Old 06-06-2011, 06:19 PM
FireRanger FireRanger is offline
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Default Re: Factory or Flex Fan for towing

Well a flex fan is going to do the opposite. They're designed to move less air as RPM increases. If you don't want an electric fan and the clutch is bad, you might as well replace the clutch and keep the stock fan.

I think a more productive thing to do would be working over the cooling system to make sure it is all operating at 100%. How old is the pump and when was the last time the coolant was flushed. Radiator being clogged full of junk could restrict it as well.
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Old 06-06-2011, 06:35 PM
ColinS ColinS is offline
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Default Re: Factory or Flex Fan for towing

^ listen to this guy he knows his stuff on this subject
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Old 06-06-2011, 06:54 PM
88ranger89camaro 88ranger89camaro is offline
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Default Re: Factory or Flex Fan for towing

well i know the fan clutch is not working, so i do think put a new clutch on it and i was planing on a new pump, and a flush/clean
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Old 06-06-2011, 06:57 PM
ColinS ColinS is offline
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Default Re: Factory or Flex Fan for towing

a new thermostat wouldnt hurt either.
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Colin S. AGE: 18
1994 Ford Ranger XLT 4x4 reg. cab 4.0l 5spd, 2" SL , Summit Nomads 15x8, 30x9.5x15 Trail Digger M/T's, cab lights, spray in bed liner, custom tube bumper,

1994 Ford Ranger XLT 2.3l 5spd ext. cab. the loaner truck

1987 Camaro z28 383 to much to list

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Old 06-06-2011, 07:23 PM
88ranger89camaro 88ranger89camaro is offline
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Default Re: Factory or Flex Fan for towing

yea i figure all that should be about $100
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Old 06-06-2011, 08:26 PM
pooleo pooleo is offline
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Default Re: Factory or Flex Fan for towing

grab a flex fan. I did this mod on my plow truck because I had cooling problems. Yes the fan will flex out flat, but it moves a sh!t ton more air. I have a manual temp gauge on my truck and you can see the thing work. It cools down so fast the truck will not maintain temp. its not ridiculus tho. Truck will warm up to 190 then when the thermostat opens the temp will drop down to 165-170. This process repeats continually while driving. It did not do this with the factory fan. I have a thread about it somewhere on here.

----------

found it ~ http://www.fordrangerforum.com/4-0-s...at-needed.html
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Old 06-06-2011, 09:43 PM
88ranger89camaro 88ranger89camaro is offline
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Default Re: Factory or Flex Fan for towing

i was thinking that it flating would be bad tho, but thinking about it some the factory fan is still free spinning untill it get to hot then the clutch will lock it in, where even if the blades have flatened some its still locked in and i would guess moving more air than the free spinning factory one

im still want to do the pump, flush, and put a 180 stat in it

more opinions are welcome
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Old 06-07-2011, 04:21 AM
FireRanger FireRanger is offline
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Default Re: Factory or Flex Fan for towing

It isn't freewheeling until it locks. The fluid clutch is variable so it ranges from free spinning to locked. But I suppose the fact that the flex fan does not use a clutch will make cool more when it isn't flattened out since it is always at 100%. I'm curious what RPM it starts to flatten out at? You're probably going to sacrifice a small amount of power and MPG for this though too.

Jason, where do you have that temperature gauge's sensor? That kind of temperature swing is odd.
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Last edited by FireRanger; 06-07-2011 at 04:25 AM.
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  #11  
Old 06-07-2011, 04:55 AM
pooleo pooleo is offline
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Default Re: Factory or Flex Fan for towing

I Teed off from the factory sensor by the T-stat. The Flex fan actually flatens out real quick, I would guess about 1,200-1,400 by engine sound. It does make a huge difference tho, before with the stock I had to run the plow about an 1" off the ground. Now I can run the plow all the way up completely blocking the front and its cools just fine

As far as the swing in temp goes, I can only relate that to the flex fan's massive cooling capacity. Tho the stock cluster gauge will not fluctuate like the mechanical...

----------

I have not noticed any decrease in power/performance or mpg's with my flex fan. All I notice is the sweet "super charger" sound it makes
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Quote:
A Gladiator does not fear death. He embraces it. Caresses it. Fucks it. Each time he enters the arena, he slips his c0ck in the mouth of the beast, and prays to thrust home before the jaws snap shut. - Oenomaus
Ball Joints/Upper A-Arms How To
Replace Door pin/bushing
Repair broken dome light tabs
VIDEO OHC Install
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  #12  
Old 06-07-2011, 06:25 AM
FireRanger FireRanger is offline
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Default Re: Factory or Flex Fan for towing

Yea the instrument cluster gauge reads very very little difference between 170 and 220. I suspect they designed it like that on purpose so people don't see it constantly moving and get all nervous. Same reason they made the oil pressure gauge a dummy. Once you go passed 220-225, it starts moving up the scale quickly, totally disproportionate. That's why I always have water temp on my scangauge, which is reading the temperature reported by the PCM sensor.

You're tapped into the gauge sender which is in a different location than the PCM sensor I think (never had to dig around for them). So that probably explains why your seeing the huge swing down in temperature that the PCM sensor doesn't see. The location of the gauge sender is probably in a place where cooler feedwater is more prevalent maybe? None the less, it shows that your fan is definitely working its ass off.

The fact that the flex fan has no clutch is most definitely contributing to its excessive cooling abilities. It clearly isn't flexing to a completely flat position and is still moving a significant amount of air even at higher RPM. I'd like to see some specs on the thing that show CFM at given RPM's. I doubt there are any CFM specs for the stock clutch fan to compare too though, but you could compare it to a similarly sized e-fan.

If it was flexing out to nearly or completely flat, it would actually be inhibiting air flow since it would essentially be a huge spinning disk blocking air from freely blowing past it. This is one reason why aircraft with adjustable pitch propellers go to the flattest position they have on approach and landing. The flatter pitch blades spinning at idle are not generating much thrust given the speed of the aircraft, but the air hitting the massive front facing blade surface provides a nice amount of drag to help slow the plane down.
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  #13  
Old 06-07-2011, 10:38 AM
pooleo pooleo is offline
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Default Re: Factory or Flex Fan for towing

it seems like I remember something about 3,300 cfm. But I cant seem to find that data. I was thinking about going electric at the time and was looking at cfm's of each
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Quote:
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Ball Joints/Upper A-Arms How To
Replace Door pin/bushing
Repair broken dome light tabs
VIDEO OHC Install
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  #14  
Old 06-07-2011, 11:13 AM
pooleo pooleo is offline
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Default Re: Factory or Flex Fan for towing

heres a vid of the flex fan

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Quote:
A Gladiator does not fear death. He embraces it. Caresses it. Fucks it. Each time he enters the arena, he slips his c0ck in the mouth of the beast, and prays to thrust home before the jaws snap shut. - Oenomaus
Ball Joints/Upper A-Arms How To
Replace Door pin/bushing
Repair broken dome light tabs
VIDEO OHC Install
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  #15  
Old 06-07-2011, 12:45 PM
FireRanger FireRanger is offline
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Default Re: Factory or Flex Fan for towing

Cool. Based on the amount of crap blowing all over the place, looks like it is still moving lots of air at high RPM. Since you were standing in front of it, how does it feel compared to a stock fan or something?
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How to: Aux light wiring, relays, & fuses
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