Taurus E-Fan Conversion

[jschrauwen]

I finally finished my Taurus E-Fan conversion.

New 1995 Taurus E-Fan.

The left side was slightly trimmed and the top center tab was removed.


The bottom of the fan had a large gap that needed to be closed up.



I used some malleable plastic that I cut to size and heated to roughly the countour of the fan shroud and then rivetted into place.



Inside view of shroud plastic cover.





Aluminum radiator modification.
The two top bungs would be used to hold the upper part of the fan in place.
Two more aluminum bungs were added to the lower part of the radiator.
As well, the larger bung for the Audi Thermosensor was added.



Mounting the fan to the radiator.











New 1990 Audi 2 Speed Radiator Thermosensor with custom aluminum bung.
Low Speed ON - 167F (75C)
Low Speed OFF - 158F (70C)
High Speed ON - 180F (82C)
High Speed OFF - 170F (77C)




Hollister Road Fan Relay Kit
http://www.hollisterroad.com/proddetail ... d=MarkVIII



Modified Hollister Road Fan Relay Kit
Substituted the 8ga main battery feed wire for 4ga multi-strand cable
Various relay wires cut to length and covered with cable protectors.
Top left is an inline 7.5A fuse for the relays connected to an available ignition switched 12V source to ensure fan will only come on when the ignition is on.



Metrapac 630 connector kit used for fan main power feed (on the right).
Two Ground connections (to the left) for fan and for thermosensor.
Mian 50A slow-blo fuse (bottom left).



Fan power feed (with Metrapac connector) lines marked for High speed, Low Speed and ground.



Audi Thermosensor Connector purchased from local VW audi shop.











After install.

From the top.


Heaps of clearance.




From the bottom looking up.


From the bottom again.


From the bottom looking at the thermosensor.



http://forums.corral.net/forums/general ... -amps.html



Before E-Fan conversion.




After Taurus E-fan conversion.

















Testing the Audi Thermosensor
http://www.youtube.com/watch?v=cOuNreEindQ


Testing complete Taurus E-Fan system
http://www.youtube.com/watch?v=fmj-h8ZE3-o
Testing confirmed that the low speed thermosensor on-off trigger thresholds are not consistant with advertised thresholds. I attribute that to mounting the thermosensor on the lower portion of the end tank as opposed to the upper most portion where the coolant coming in from the engine would be hotter. Basically, the distance between the oem coolant temp sensor and the Audi thermosensor is creating the variance in triggering thresholds observed.

The results so far look promising and I`ll reserve final judgement til after a road test.

[jschrauwen]

Pics showed up OK on preview and now they don't.
This might suffice - http://www.aus300zx.com/forum/showthread.php?t=326836

[t.mcginley.jr]

All the pics are showing up just fine for me! and awesome job man!! looks very clean, this should be added to the FAQ page or something

[jschrauwen]

All the pics are showing up just fine for me! and awesome job man!! looks very clean, this should be added to the FAQ page or something

Thank you.

In the last few days I got to test the e-fans abilities on the road.
I chalked up about 700kms of various conditions from city, rural, highway, etc.
Constant highway speeds of 70mph would range from 169F to 172F.
Easy city traffic gave me between 162F to 172F.
While stuck in highway gridlock for 30 minutes in 75F weather I saw temps max out at 176F. During gridlock in varied between 172F and 176F.
Not once did the high speed function ever have to kick in. Even after a few sessions of good boosting.
At present, I'm quite happy with the results I've seen so far.
Another Z32 friend of mine got to see it for the first time after having reservations about it when I first talked to him about my conversion. He changed his mind after seeing it and after he and I did a slight timing adjustment. The ease in which you can see not only the crank pulley directly, but being able to see many other components on the front of the engine is great for keeping tabs on serviceability.
Now my friend wants me to spec out a similar conversion project for him - go figure.

[McShanks]

I am resurrecting this thread on purpose: a little over 1 year later, how has this held up?

[jschrauwen]

I am resurrecting this thread on purpose: a little over 1 year later, how has this held up?

This has held up quite well. In fact too well. I've never had the fan even get to the high speed. I assume it's because it works so well. It works so well that it keeps my coolant temps lower then desired but I believe thats due to the temp range of the thermo sensor I'm using. The optimum temp rage is just above the 175F* for the proper idle fuel maps to kick in and my thermo sensor has the fan's low speed kick in at 172F*. I have acquired a slightly higher temp range thermo sensor that I'll be installing over the winter.

But as far as the fan and it's effectiveness, it has surpassed my expectations and definitely works better at idle and lower speeds then the oem viscous fan.

[McShanks]

Thanks for the response, I will definitely keep this in mind as I go through my rebuild. My stock fan has micro-cracks all over it, and it is just a matter of time before it shatters...

[ZGirl86]

Hey! Is it possible to do the Taurus conversion without any additional mods? We adapted the Taurus fan and motor to a shroud that I had from a previous electric fan that I got. We have an aftermarket temp gauge to get a more accurate reading. Also,we took out the thermostat completely while we were testing the other electric fan. Now the problem we are having is that the temp keeps going up to around 200℉. Today I took a drive to the mall which is a few miles away from where we live and the temp got up to 216℉. With the stock fan in, it's "home" is about 160℉. I guess I'm wondering if you have any input on what we should do. Is it necessary to get the sensors? Thank you! p.s...we live in Phoenix, AS so it gets pretty toasty here...