Electric Push Fan's

[DieselBoy]

Adding an extra fan to the front of your radator is a common mod to a 4WD.

It helps with cooling when on long slow hill climbs, or when the raditator is starting to fill with mud.

Finding a good push fan is an issue though.

Most car's have good fans on them, they move alot of air (CFM). It apears that they are all set up as pull fan's, and there is no easy way of reversing them to make them a push fan.

If you go on trademe or to Repco or Supercheap, you can pick up an aftermarket fan for about $70. They are set up as a pull fan, but you can pull the fan blade off and flip it over, and then wire the motor in reverse making it a push fan.

Trouble is that these aftermarket fan's don't have any where near the CFM rating that a OEM car fan does, and as a result is not enough to keep an engine cool.

I can think of a few example's, Bulletproof tried to substitute his viscous fan for one of these cheapies, no good. Mudslutt had one in his Suzuki SJ413, no good, swapped it for a Corolla pull fan, all better. Vvega had two cooling his 1uz, no good, fitted 1 BMW push fan and problem solved.

So my question is:

Has any body found a really good 12" push fan?? They must be out there !!!!!

[Smurf]

I have two 10 inch vitara fans in the front of my surf, running a 5M Supra with the Supra radiator. Keeps it cool 90% of the time.
I used to have a vitara one beside a supercheap 10 inch pusher and the vitara one pushed WAY more air than the cheapie

[gimmemud]

Get a vn commodore fan, swap the polarity of the 12v and it'll change directon

[DieselBoy]

Your missing the point here.

You can't easily turn one of these OEM pull fan's into a pusher.

By reversing the polarity, sure the motor spin's in reverse, but the fan blades are now running in the wrong direction for their curve and leading edge shape to move air. Basically, they just start making alot of noise as the blades flap against the air, rather than move it through your radiator.

If you could find some way to flip the fan blade over, that would be sweet!!!!!

Are the Vitara fan's set up as a push fan from factory??

[Smurf]

Are the Vitara fan's set up as a push fan from factory??

yep, they are bolted in front of the air con radiator.

[rangimotors]

Are the Vitara fan's set up as a push fan from factory??

yep, they are bolted in front of the air con radiator.

any pics of your set up? im trying to keep a 6m cold at the mo with very limited room

[Rotazuk]

The vitara runs a fan off the water pump , what you guys have got is an air cond fan off the front of the air cond radiator . Have one sitting on the shed floor somewhere if you want to size it up DB . Doubt it has the flow of a good radiator fan thou , still two would do the job .

Chris

[Bulletproof]

I have two 10 inch vitara fans in the front of my surf, running a 5M Supra with the Supra radiator. Keeps it cool 90% of the time.
I used to have a vitara one beside a supercheap 10 inch pusher and the vitara one pushed WAY more air than the cheapie

Hi Keith.
I don't like the sound of keeping it cool 90% of the time. I wouldn't except anything less than 120% allowing for a clogging radiator.

I solved mine by increasing the number of cores in the radiator

Cheers Richard

[Smurf]

I have two 10 inch vitara fans in the front of my surf, running a 5M Supra with the Supra radiator. Keeps it cool 90% of the time.
I used to have a vitara one beside a supercheap 10 inch pusher and the vitara one pushed WAY more air than the cheapie

Hi Keith.
I don't like the sound of keeping it cool 90% of the time. I wouldn't except anything less than 120% allowing for a clogging radiator.

I solved mine by increasing the number of cores in the radiator

Cheers Richard

I don't like it either but I have yet to replace the radiator core as I am guessing it to be the original core. I will be upgrading the core size if possible. The only time it heats up is when full of mud

[Smurf]

Are the Vitara fan's set up as a push fan from factory??

yep, they are bolted in front of the air con radiator.

any pics of your set up? im trying to keep a 6m cold at the mo with very limited room

This is the only pic I have
this is the Vit fan next to the supercheap one.

[vvega]

I have two 10 inch vitara fans in the front of my surf, running a 5M Supra with the Supra radiator. Keeps it cool 90% of the time.
I used to have a vitara one beside a supercheap 10 inch pusher and the vitara one pushed WAY more air than the cheapie

Hi Keith.
I don't like the sound of keeping it cool 90% of the time. I wouldn't except anything less than 120% allowing for a clogging radiator.

I solved mine by increasing the number of cores in the radiator

Cheers Richard

im going a 22" hydro to make sure i have the buffer

[Jerry]

you can get the davies craig fans which are reversable...both by the blades i think and just reversing the power wire, the one on my pos mounted in the front seems to push a lot of air thru it.... there isn't one on the rear yet but I'm looking at the options there...

They cost a bit of extra coin but may be worth it....

[meatc]

V8 disco have twin 10" push fans. they move a heap of air. I'm running a pair in reverse on the inside of my buggy rad

[monaro427]

i have on mine two ten inch ones that you can buy from supercheap, have never had a probl;em overheating went sweet as with the temp on the thompsons trip over easter but before that i had two (i think they were around ten inch) fans from a mazda and a mitis i think and they were both pusher fans as there is no room with the 5m in there and with those i never had a overheating problem at all, drove from chch to west coast and didn't even get near half way

[wjw]

Your missing the point here.

You can't easily turn one of these OEM pull fan's into a pusher.

By reversing the polarity, sure the motor spin's in reverse, but the fan blades are now running in the wrong direction for their curve and leading edge shape to move air. Basically, they just start making alot of noise as the blades flap against the air, rather than move it through your radiator.

If you could find some way to flip the fan blade over, that would be sweet!!!!!

Are the Vitara fan's set up as a push fan from factory??

You reverse the polarity AND turn the blades round... its one bolt to turn them. I can blow paper off a desk 10' feet away...

[wopass]

You reverse the polarity AND turn the blades round... its one bolt to turn them. I can blow paper off a desk 10' feet away...

i can do that with a fart

[DieselBoy]

Your missing the point here.

You can't easily turn one of these OEM pull fan's into a pusher.

By reversing the polarity, sure the motor spin's in reverse, but the fan blades are now running in the wrong direction for their curve and leading edge shape to move air. Basically, they just start making alot of noise as the blades flap against the air, rather than move it through your radiator.

If you could find some way to flip the fan blade over, that would be sweet!!!!!

Are the Vitara fan's set up as a push fan from factory??

You reverse the polarity AND turn the blades round... its one bolt to turn them. I can blow paper off a desk 10' feet away...

Hahaha, like i said, its easy to do that with these aftermarket fans, which don't have a very impressive CFM measurement:



Like you said, you reverse the polarity and flip the blade, but they still don't have the CFM measurment of an engine fan such as this:



Just one of those fans by itself moves the equivilant of three of those aftermarket fans above.

As you can see in the photo, you can't just flip the blade over like you can with the aftermarket fans.

What i'm trying to do is find out what vehicles people have sourced good engine cooling push fans from for their trucks.

So far, Disco's have good push fans', Vitara's may be a good source but they are an aircon fan, not designed for engine cooling, i have a RB32 Skyline 12" aircon push fan on its way, so that might be another possibility.

My bet is that even if they are an aircon fan, they will still move more air than the cheapies

[Bulletproof]

Dieselboy is right , there is no such thing as a reversible fan that will move air properly because the curves of the blade are wrong.

Cheers Richard

[DieselBoy]

Dieselboy is right , there is no such thing as a reversible fan that will move air properly because the curves of the blade are wrong.

Cheers Richard

Kind of..........

The aftermarket fans like i posted above are totally 100% reverseable, but don't move much air in either direction

The OEM engine cooling fans like the twin MR2 fans i posted, and most other factory electric cooling fans can not be reversed due to the shape of their blades, and the fact that you can't take the blade off and flip it over so it spins in the right direction to properly move air.

[meatc]

Hmm

All this talk about reverability was something I never considered when using the twin disco push fans as pull fans. Just went and had a look and hmm looks like dispite how much air they move in reverse fowards would be better. Now that is something else to add to my to do list. either remount them in front or replace them

D.B have you got a couple of OEM pull fans? Do you want to swap them for the push ones I have? Will be down that was end of next week.

[wjw]

Dieselboy is right , there is no such thing as a reversible fan that will move air properly because the curves of the blade are wrong.

Cheers Richard

Kind of..........

The aftermarket fans like i posted above are totally 100% reverseable, but don't move much air in either direction

The OEM engine cooling fans like the twin MR2 fans i posted, and most other factory electric cooling fans can not be reversed due to the shape of their blades, and the fact that you can't take the blade off and flip it over so it spins in the right direction to properly move air.

I was talking about the commodore fans, you can switch the polarity and switch the blades round... with my rough testing, it pushed as much air as it pulled...

[rokhound]

What size are they Bill? (the commonwhore ones that is )

[DieselBoy]

Dieselboy is right , there is no such thing as a reversible fan that will move air properly because the curves of the blade are wrong.

Cheers Richard

Kind of..........

The aftermarket fans like i posted above are totally 100% reverseable, but don't move much air in either direction

The OEM engine cooling fans like the twin MR2 fans i posted, and most other factory electric cooling fans can not be reversed due to the shape of their blades, and the fact that you can't take the blade off and flip it over so it spins in the right direction to properly move air.

I was talking about the commodore fans, you can switch the polarity and switch the blades round... with my rough testing, it pushed as much air as it pulled...

Shit, you should have said, thats a usefull piece of info right there!!!!

Commodore fans move heaps of air, and if you can flip the blade, then there will be no difference as a push fan, then there would be if it was a pull fan.

Good to know!!

[wjw]

Shit, you should have said, thats a usefull piece of info right there!!!!

Commodore fans move heaps of air, and if you can flip the blade, then there will be no difference as a push fan, then there would be if it was a pull fan.

Good to know!!

Exactly!

And only $15 They do get nosiy once you get a decent amount of mud in the motors, but they keep going Mrs has taken the truck to work so can't measure it.

Just remember they have a long motor...

[wjw]

If I remember rightly, those after market fans are around 2500 to 3000 CFM, the commodore ones are 4400 CFM

[MNC]

If I remember rightly, those after market fans are around 2500 to 3000 CFM, the commodore ones are 4400 CFM

Do you have a particular year recommendation or model of commodore (SS etc) that is better than others? Great info - assume the $15 you are talking about is a wrecker special? Thanks Bill.

[gimmemud]

If I remember rightly, those after market fans are around 2500 to 3000 CFM, the commodore ones are 4400 CFM

Do you have a particular year recommendation or model of commodore (SS etc) that is better than others? Great info - assume the $15 you are talking about is a wrecker special? Thanks Bill.

Pretty sure that is usual pick a part price. and there is always a vn or vp there with one left in it. My temp stays good with the vn exec one it has (unless i forget to turn it on )

[MNC]

If I remember rightly, those after market fans are around 2500 to 3000 CFM, the commodore ones are 4400 CFM

Do you have a particular year recommendation or model of commodore (SS etc) that is better than others? Great info - assume the $15 you are talking about is a wrecker special? Thanks Bill.

Pretty sure that is usual pick a part price. and there is always a vn or vp there with one left in it. My temp stays good with the vn exec one it has (unless i forget to turn it on )

Sweet, let me know next time your heading there Tim and I'll come for the drive and pick me up one

[wjw]

The fan is 14"




IT just fits between the grill and the radiator with no modifications to radiator mounts or grill mounts. The aircon radiator was removed and a trans cooler installed in its place

If I remember rightly, those after market fans are around 2500 to 3000 CFM, the commodore ones are 4400 CFM

Do you have a particular year recommendation or model of commodore (SS etc) that is better than others? Great info - assume the $15 you are talking about is a wrecker special? Thanks Bill.

Some have a slimline one's similair in thickness to the aftermarket ones. You really need to get the one above with the massive motor on it.

[suzolla]

Hi wjw,

I see you don't have a shroud on your fan, was that intentional or just to difficult to fit.
Would have thought would get better cooling if it had a shroud, particulrly at low speeds, as some of the air will be getting lost to the sides with no shroud, also shroud would stop some of the mud.

Thanks
Tim