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Dual 12inch Thermo Fan Shroud?

ryan101

By ryan101,
in Victoria

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Rekin Grand Master

Rekin

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Im using a dual thermo fan setup on my 52mm radiator in my rb20 r32.

Due to the very limited space I got a Flex-a-lite 420 (thinnest on the market)

http://www.frsport.com/Flex-A-Lite-410-420...FM_p_12555.html

A very cheap and popular one is thermofan setup from AU Falcon. They do a great job, but are quite thick. Google AU Thermofan and you will finda heap of people fitting them into all sorts of cars.

Rekin Grand Master

Rekin

Posted
Posted
i should have said that i already have 2 12inch fitted, i just don't have a shroud! i don't really want to take the radiator out to fit a shroud so what would the best way to go about it?

You would need to make up a custom one, and even then its not going to work as how its meant to.

Im assuming you have mounted the thermo fans directly onto the radiator? The thermofans need to be spaced off the radiator. The thermofans then allow the fans to pull air using the shroud. By mounting it directly to the radiator and covering the rest with a shroud aint going to achieve much :P

ryan101 Rising Star

ryan101

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You would need to make up a custom one, and even then its not going to work as how its meant to.

Im assuming you have mounted the thermo fans directly onto the radiator? The thermofans need to be spaced off the radiator. The thermofans then allow the fans to pull air using the shroud. By mounting it directly to the radiator and covering the rest with a shroud aint going to achieve much :down:

mm that sux, maybe i will wait to i put new coolent in, i will take the whole thing out a do sumthing then

Rekin Grand Master

Rekin

Posted
Posted
mm that sux, maybe i will wait to i put new coolent in, i will take the whole thing out a do sumthing then

yeah pull it off and do it right! Buy a AU thermo fan setup (beware of the copies floating on ebay) Get a genuine AU thermofan from a wrecker or brand new from Ford. Install it and achieve the following;

ryan101 Rising Star

ryan101

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yeah pull it off and do it right! Buy a AU thermo fan setup (beware of the copies floating on ebay) Get a genuine AU thermofan from a wrecker or brand new from Ford. Install it and achieve the following;

thats great, good job looks like it works a treat

Rekin Grand Master

Rekin

Posted
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I purchased the Flex-a-lite 420 thermofan from USA - 6.7mm thick

Flexalite_410_03.jpg

photo5161024x768.jpg

photo5141024x768.jpg

As you can see from the pics, it was very very close to my power steering pump.

The AU Thermofans flow a lot more air (close to double) so they are a much better fan setup for quick cooling. I tried doing a similar test as the video above, but mine didnt drop anywhere near as fast. Although mine was in the direct sunlight on a warm day. Couldnt get it below 81degrees on full speed at idle. However, there is a lot of gaps around the radiator which I will need to block off so there is room to improve.

Controller im using is; Spal PWM controller

http://www.spalusa.com/store/main.aspx?p=i...item=FAN-PWM-V3

Read the manual for the features, best on the market in terms of control.

I'll try and get some proper photos up on the weekend.

Rekin Grand Master

Rekin

Posted
Posted
Hey rekin, got those pics yet? And what temp to u have ur thermos turn on?

nah bro, been raining for the past couple of days. Will have to wait till the sun comes out!

Using the Spal thermofan controller, low temp set at 82deg and high temp at 89deg i think

Rekin Grand Master

Rekin

Posted
Posted
Thanks how hard is the wiring?

http://www.spalusa.com/pdf/FAN-PWM-V3_SPEC.PDF

Look at Page 19 for wiring diagram for dual thermofan with OEM water temp sensor. The wiring takes some time but it is straight forward.

A dual thermofan setup requires a relay, which i picked up from Jaycar.

SPAL ftw :) I'm using SPAL for mine.

:P does a great job at not draining the battery!

For those who dont know, it turns on one fan at 50% speed and gradually increases the speed to 100% depending if temperature increases. Once it hits the high temp setting, it will turn on the 2nd thermo fan and both will run at 100% speed until 5degree temp drop occurs and turns off the 2nd fan etc.

All explained in the PDF. The idea is not to turn both fans on at 100% when it hits a temp setting as that will just shock the whole electric system.

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