radiator fan question

[99 gst spyder]

Now I'm running two ebay pusher slim fan that came with my radiator but still I cant help to keep it in the lower normal temp. With this I'm stuck at around 216-225 coolant tempurature. I can't seem to fit them as a puller that's why I have them in front of the radiator.

Can I wire a 3rd fan as a puller and how do I come about this or has anyone every try running 3 fans?
Or switching the radiator fan as a puller instead. Will this help lower the temp? I should be able to fit one slim fan behind the passenger side radiator but not the driver side.

What other option do I have. I know the stock fan flow way more air but I want to try staying with the slim fans before I have to go to the stock fan.

Thanks.

 

[jrohner]

I'm surprised it runs that cool with just slim fans. Try fit at least one stock fan on there.

 

[blizz99]

I'm running 2 eBay fans as well. I have it set up as 1 pusher and 1 puller. Even with water wetter I was seeing the same temps as you. My solution was to seal the radiator and fmic so no air can escape and HAS TO go through the radiator. Now, my temps don't go above 195! Btw, wiring in 3 fans will only hurt/restrict air flow.

 

[goldeninja20]

You can switch a pull fan to a push and a push to a pull. You just switch the two wires. I have a shroud and 2 pull slim ebay fans. Not sure what my temps get too because the car hasnt been brought up to temp yet

 

[gofer]

What are your fans DESIGNED to be, a pusher or a puller? It is true that if you wire them in backwards they will spin the other way, however, you must also flip the blades to make them work efficiently.

I've got ONE 12" push SPAL installed on a Mishimoto radiator with no ducting located on the passengerside of the radiator with a stock 180* t-stat and my coolant temps hover around 200* - 205* with Prestone 50/50.

When are you seeing high coolant temps and have you tried burping the system better? I use a Matco spill free funnel kit to burp it and it works great 10x better than just a typical funnel.

Here's a shot of my radiator setup, don't mind the dust on the front mount...

You must be logged in to view this image or video.

 

[99 gst spyder]

I was planning to put an extra fan as a puller on the passenger side so I'll end up having two on the passenger and one on the diver side and wire the two passenger fan with a relay straight to the battery and ground but still connected to the stock radiator fan harness. Will this be okay?

 

[Tyeler18]

Ducting is the key to fan efficiency, id leave the two pushers and run ducting shrouds around them. Like gofer said, a single fan is enough to keep them cool.

 

[99 gst spyder]

What are your fans DESIGNED to be, a pusher or a puller? It is true that if you wire them in backwards they will spin the other way, however, you must also flip the blades to make them work efficiently.

I've got ONE 12" push SPAL installed on a Mishimoto radiator with no ducting located on the passengerside of the radiator with a stock 180* t-stat and my coolant temps hover around 200* - 205* with Prestone 50/50.

I have try both pusher and puller by switching the positive and ground. So instead of positive going to positive, positive will be going to negative and negative will be going to a positive in order to switch a fan from pusher to puller. Depending on the fans itself, some are mad one way and some are interchangable by switching the wires.

Mine are pusher or puller and have try by switching the wires.

 

[gofer]

...but you haven't flipped the blades on the fan. So, what I'm trying to tell you is that you can't just flip their wiring and call it good because they won't cool shit that way. The fans blades have to be pulled and flipped with the wiring or else they're just blowing hot air.

In a nutshell, fan blades are designed to work in one direction.

 

[99 gst spyder]

...but you haven't flipped the blades on the fan. So, what I'm trying to tell you is that you can't just flip their wiring and call it good because they won't cool shit that way. The fans blades have to be pulled and flipped with the wiring or else they're just blowing hot air.

But wouldn't flipping the fan and switching the wires make pull the opposite way you wanted.

 

[gofer]

If you've got a pull fan (back of the radiator) the blades are designed to PULL air through the radiator but then, lets say, you reverse the polarity on the motor by switching the wires and make it a push fan. You mount it on the front of the radiator to now PUSH air through it, however, you didn't flip the fan blades. It will still move air through the radiator because of the direction you've got it spinning but FAR LESS efficiently since the blades are facing the wrong direction.

When you wire them in reverse, doing the opposite of what the radiator fan was designed to do, then you also need to flip the fan to do the opposite of what it was designed to do, either push or pull.

 

[jrohner]

You need to flip the blades because they are usually curved, so if you just swap the wires, the blades are curved wrong for spinning the opposite direction. Yes they will move air, but not nearly as much as if the blades are curved correctly. You should be able to tell, just looking at the curve of the blades, what direction they should be spinning.

The aftermarket radiators have 2 rows of fins, so that's why they cool better even with only one fan (twice the surface area AND they hold more coolant). Keep in mind that if you only have one fan you're basically using 1/2 the radiator when you're not moving.