To those running dual slim fans

[Clipse]

I've recently installed a PTE 50 trim and inturn had to utilize a 12" SPAL slim fan in order for it to fit. This one fan, as I'm sure you can all imagine, is not doing it's job as I overheat after a couple of good hard pulls. Right now I have this fan running through the factory relay and temp sensor so it still runs through the fuse. I'd like to wire the second fan so it utilizes the same sensor and comes on at the same time. I've thought about running a switched (ACC) power source through a fuse and a relay so they turn on without the need for a switch.

To those of you running a dual fan setup in this fashion, please explain how you have it wired. Just looking for ideas. Thanks!

 

[dirk3]

http://www.vfaq.com/mods/wayback/1gcoolingfan.html

 

[Clipse]

I have no A/C

 

[4G63 For Me]

There are 4 wires on each stock connector. The slimline fans have 2 wires. Use all 4 wires from the stock connector where the fan is always on.

 

[Burnett03]

I've recently installed a PTE 50 trim and inturn had to utilize a 12" SPAL slim fan in order for it to fit. This one fan, as I'm sure you can all imagine, is not doing it's job as I overheat after a couple of good hard pulls. Right now I have this fan running through the factory relay and temp sensor so it still runs through the fuse. I'd like to wire the second fan so it utilizes the same sensor and comes on at the same time. I've thought about running a switched (ACC) power source through a fuse and a relay so they turn on without the need for a switch.

To those of you running a dual fan setup in this fashion, please explain how you have it wired. Just looking for ideas. Thanks!

i have my dual fans wired together, and then wired through the factory relay system. 185 degrees i believe and they kick on.

 

[Clipse]

i have my dual fans wired together, and then wired through the factory relay system. 185 degrees i believe and they kick on.

Ok, thank you for a useful response! My only concern in going that route was the amount of current draw it would produce. So, the 2 fans wired together (series or parallel?) don't pop the stock 30A fuse? I haven't taken the time to measure the draw.

Nice car by the way. Well done.

 

[4G63 For Me]

My only concern in going that route was the amount of current draw it would produce. So, the 2 fans wired together (series or parallel?) don't pop the stock 30A fuse? I haven't taken the time to measure the draw.

Nope, or at least I haven't experienced this.

 

[JiggahMan]

I think you should be looking at other things than a fan for overheating.. I am only running 1 slim on a 1g w/ a 20g and sh!tty intercooler.

Make sure your thermostat is still in working order.

 

[Clipse]

I think you should be looking at other things than a fan for overheating.. I am only running 1 slim on a 1g w/ a 20g and sh!tty intercooler.

Make sure your thermostat is still in working order.

Thermostat is fine. My question for you is what size is your fan? And are you running a 3.5" core like me?

 

[CyberEye]

is there a shroud around your slimline?

 

[Clipse]

is there a shroud around your slimline?

Negative, and I have a shitty radiator. Looks like someone tried to rape it, but it didn't cause me a problem before the slim fan was installed. Replacing anyhoo...

 

[rob_rousseau]

So, the 2 fans wired together (series or parallel?) don't pop the stock 30A fuse? I haven't taken the time to measure the draw.

You definately want the fans wired in parallel or you'll get less output. I would go about wiring the fans up (in parallel) with new wire (of proper awg) and a relay. Use the stock 12-volt source that would supply the stock fans, and use that supply to energize your relay. Top that off with a fuse as close to the battery as possible. A little larger gauge wire will most likely let your new fans see a little more voltage.

 

[Clipse]

You definately want the fans wired in parallel or you'll get less output. I would go about wiring the fans up (in parallel) with new wire (of proper awg) and a relay. Use the stock 12-volt source that would supply the stock fans, and use that supply to energize your relay. Top that off with a fuse as close to the battery as possible. A little larger gauge wire will most likely let your new fans see a little more voltage.

Yeah, I don't know why I even added that in there. The second fan would be useless in series... . Anyways, got it all set up so they cycle on just as the stock fans would (around 190-195) and it seems to be staying consistently between 189 and 199 which isn't bad though I'd like it a little cooler. Come to find out the SPAL only draw 6.8A each so the stock 30A is more than ok to run the both of them.

I think I may just end up jumping the relay so they run all of the time, instead of the fan only cycling at temps that are already kindof high in my mind. Thanks for the insight people!

 

[CyberEye]

shrounds will help ALOT

 

[rsunahar]

I've been through quite a few fans.


And I have to say there is a significant difference between the SPAL high performance and their slim line series.
The high performance by far outflows any other fan I've had for its size.
You'll know that it's the high performance series because current draw is pretty high, and you basically will want to run a relay.

I have two fans right now (that I've settled on), one 13 inch high performance Spal wired to the stock connector on the passenger side (main cooling fan), and a Mr Gasket 12 slim on the driver's side, wired in with a relay that activates when the stock cooling fan kicks on--both fans coming on at the same time.

I went through Zirgo, one FAL, and a smaller Mr Gasket fan. After going to the track and seeing a friend's 12inch high performance SPAL, I bought a high performance 13. The SPAL 13 inch by itself is able to keep the car from overheating, and I had it running solo for quite some time.
But then I got irritated from it being on too often and bought a cheap Mr Gasket 12 from a friend. I would have bought another SPAL high performance, but the 13 was doing fine by itself; I just needed slighly more airflow.

Make sure to mount the fan as flush as possible to the radiator.

And like the previous poster stated, a shroud makes a big difference.
Basically, if you don't have shroud, you're replacing the directed airflow with mucho flow.
So you NEED higher flowing fans without a shroud. It's inefficient but it's what you have to do if you cant fab up a shroud on your own---like me


High performance series...

 

[Clipse]

I've been through quite a few fans.


And I have to say there is a significant difference between the SPAL high performance and their slim line series.
The high performance by far outflows any other fan I've had for its size.
You'll know that it's the high performance series because current draw is pretty high, and you basically will want to run a relay.

I have two fans right now (that I've settled on), one 13 inch high performance Spal wired to the stock connector on the passenger side (main cooling fan), and a Mr Gasket 12 slim on the driver's side, wired in with a relay that activates when the stock cooling fan kicks on--both fans coming on at the same time.

I went through Zirgo, one FAL, and a smaller Mr Gasket fan. After going to the track and seeing a friend's 12inch high performance SPAL, I bought a high performance 13. The SPAL 13 inch by itself is able to keep the car from overheating, and I had it running solo for quite some time.
But then I got irritated from it being on too often and bought a cheap Mr Gasket 12 from a friend. I would have bought another SPAL high performance, but the 13 was doing fine by itself; I just needed slighly more airflow.

Make sure to mount the fan as flush as possible to the radiator.

And like the previous poster stated, a shroud makes a big difference.
Basically, if you don't have shroud, you're replacing the directed airflow with mucho flow.
So you NEED higher flowing fans without a shroud. It's inefficient but it's what you have to do if you cant fab up a shroud on your own---like me


High performance series...

I've considered fabbing up a sheetmetal shroud. I'm gonna give the whole jumped relay idea a shot and see how well it works. Then I'll go from there. I know the HP fans far outperform my puny ass 810 CFM fans, but I'm pretty sure a continous flow of 1620 CFM will suffice. We'll see. Thanks for the input