Altima fans vs. Taurus fan comparison - SR20 Forum
 
Thread Tools
post #1 of 11 (permalink) Old 09-08-2006, 09:34 PM Thread Starter
The Groove Master
 
Rittmeister's Avatar
 
Join Date: Apr 2001
Location: Cincinnati OH
Posts: 4,241
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Feedback Score: 15 reviews
(Thread Starter)
Altima fans vs. Taurus fan comparison

I spent the last few days trying out a different fan setup. Most SR20 folks and a fair number of KA drivers remove the stock clutch-driven cooling fan in favor of electric fans. There are many different choices of course; at first I ran a dual 10" Flexalite setup that I got a good deal on, but then I read the fan and radiator test mentioned in another thread here, and sold that to buy a set of Altima fans.

The Altima fans are a large dual setup, and the shroud keeps them back from the radiator a bit (I think this is the reason they work so well). They drop into an S14 (I've read) and must be trimmed on both sides to fit between the frame rails on an S13. They can be wired to run on high or low speed, and most just run them on high all the time. I did so, and was very pleased with the results, except for the noise. Then I swapped the engine and everything else into a new chassis and decided to clean up the wiring. I could NOT get them to come on high speed the way I'd wired them before, and ended up wiring them differently, thinking they were on high with the new wiring arrangement. I noticed that they didn't seem to cool as fast, but chalked it up to it being summertime and hotter out.

As the summer went on though their performance really seemed to suffer, so I started looking around for other options, mostly on Zilvia. The Ford Taurus fan (from a 1990-1995 with 3.8L engine) kept coming up as a good choice. It's a large, (16" or so) single fan in a shroud that's the right height for the 240 radiator but not quite as wide - there's about 4" of the radiator that won't be covered.

These fans are both common in junkyards or on ebay; I got each one for about $65 shipped.

So when the Taurus fan showed up I wired it in, using the fan controller I'd always had, but setting it so that the low speed came on with the controller and the high speed with a switch. It's quieter than the Altima fans, but I wasn't convinced it really worked better, and on high speed, it needs a lot of power - it blew 30 amp fuses in seconds, 40 amps a little longer. I had to rig up a way to use two 25 amp fuses in parallel (50 total), before it would work right.

Since I was skeptical of the Taurus fan's effectiveness, I decided to compare them. Knowing that my fans almost always kick on as I pull into the driveway, I drove the car on a short loop near my house, beating on it - high revs and as much time under boost as I could muster in 1st and 2nd gear below 40 mph. I got back to the house and parked in the drive, letting the car idle, with the hood closed. I had the switch thrown so the fan ran on high, and from the time the fan kicked on it was about 6 minutes 20 seconds (watch with sweep second hand used as timer) before it cooled the engine to the point where the fan controller switched it back off. This was with the fan on high. With it on low, driving around yesterday, it would keep the coolant at a constant temp but wouldn't bring it down, so I didn't even try it that way.

I then spent fifteen minutes THOROUGHLY testing the Altima fans for low/high speed, and found that they would work on high if wired the old way; I must have screwed something when I re-wired and cleaned things up. I pulled the Taurus fan, stuck the Altima fan in, and after the car cooled for a while I drove the same loop, in the same manner (or as close as I could get to it) with the temp controller at the same setting. Sure enough, the fans came on as I pulled into the drive, and again I let the car idle with the hood closed, Altima fans on high. This time it was just under 3 minutes before the fans turned off.

I realize this is not a very controlled test. The outside temperature was about 5 degrees cooler (yes, I checked our handy little weather-station thermometer, so I know this ) when I tested the Altima fans than with the Taurus fan, so that must be taken into account. Certainly my driving wasn't identical; but I wanted to provide this info to you guys so you can either refute it or use it to make your own decisions.

My setup is: stock redtop SR20, stock turbo and fuel system, stock boost, Koyo aluminum radiator, Pivot fan controller.

My conclusion is this: now that they're wired right, I'll be sticking with the Altima fans, for several reasons.

-One, my (admittedly not perfect) test shows that they work as well or better than the Taurus fan.
-Two, it's a dual fan; if one burns out, there's still one there to get me home. With the Taurus fan, if it gets fried and I want to keep the engine healthy, it's AAA time.
-Third, the Altima fans use a lot less juice to run, and hopefully that'll keep the battery and alternator alive longer. I can't believe the Taurus fan pulls 30 amps on low and 50 amps on high... The Altima fans only use 30 amps each.
-Finally, and this is chauvinistic, they're Nissan fans, and the other one is a Ford part That just ain't right.

I'm trying to make up my mind whether to keep the Taurus unit as a spare, but given the low price of Altima fans (even brand-new ones on Ebay) I'll probably sell it.

Hope this helps some of you!

2002 Mazda Protege ES, mildly-modded daily driver
E36 M3 - new toy!
1990 240SR - screamed down the road...
Rittmeister is offline  
Sponsored Links
Advertisement
 
post #2 of 11 (permalink) Old 09-08-2006, 09:55 PM
.....
 
Join Date: Dec 2001
Location: Pueblo West, CO.
Posts: 8,886
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Feedback Score: 12 reviews
Are you using the complete Altima Fans, and shroud. Care to share a pic. I just bought a Koyo and need to be thinking about my shroud setup.

Steve
98sr20ve is offline  
post #3 of 11 (permalink) Old 09-08-2006, 11:16 PM Thread Starter
The Groove Master
 
Rittmeister's Avatar
 
Join Date: Apr 2001
Location: Cincinnati OH
Posts: 4,241
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Feedback Score: 15 reviews
(Thread Starter)
Went down to the garage to snap a few. Not great and I apologize.

View from passenger's side:


View from driver's side:


Forgive the uncovered wires, I ran out of the right size loom and need to get more.

In this pic I tried to show the clearance between the fan and the AC dryer - there's plenty of room, but I'm not sure you can see it.


To fit an S13, you have to trim about 3/4" off each side of the shroud. This will actually mean that there's no "frame" around the fan on the sides, but I've run this way in both chassis and had no issues at all; you just have to make sure that your vacuum lines and wiring are secured out of the way. On the bottom one of the feet fits exactly into the tab for the stock shroud, and at the top you must find a way to secure it yourself, nothing conveniently lines up.

When I first installed these fans, I had the radiator out of the car so I could get the crank pulley off to replace the front main seal. I set the one foot in the tab, lined everything up on the sides, and started cutting, but I never took pictures of the process.

Here are a couple pics of the Taurus unit. These are NOT my pictures, they're from a guy on Zilvia. He was running a CA18, hence the different water neck locations.





If anybody wants, I can post another thread with details about the wiring on both setups.

2002 Mazda Protege ES, mildly-modded daily driver
E36 M3 - new toy!
1990 240SR - screamed down the road...
Rittmeister is offline  
 
post #4 of 11 (permalink) Old 09-08-2006, 11:34 PM
No more SR :(
 
Join Date: Oct 2004
Location: Austin, Tx
Posts: 1,952
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Feedback Score: 8 reviews
What are your average coolant temps while driving?

95 BMW M3
217 HP / 204 TQ.
Nismo_Freak is offline  
post #5 of 11 (permalink) Old 09-08-2006, 11:58 PM Thread Starter
The Groove Master
 
Rittmeister's Avatar
 
Join Date: Apr 2001
Location: Cincinnati OH
Posts: 4,241
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Feedback Score: 15 reviews
(Thread Starter)
Fan is set to come on at 88* C. Fans kick on, then off two degrees lower, but typically the temp bottoms out at 82 or 83* before rising and activating the fans again. This is cruising or idling at a light. On the freeway, unless there's a long hill, temps usually stay at 84 or 85*, and the fans don't even come on.

I experimented with the fan set at 86, and at 84, but for street driving 88 seems to be the best compromise between keeping the temp down and not running the fans all the time. If I ever get the car to the track, I can set it to activate as low as 80.

With the AC on, all bets are off, but the highest I've seen was 95* C.

I'm running a 50/50 mix of water/coolant, with a bottle of Water Wetter in it. I've been thinking about thinning it to 70/30 or so, but I'm not sure it's necessary. If I did away with AC and removed the condenser I know these numbers would run a bit cooler, but I prefer a car that's comfy on the street.

2002 Mazda Protege ES, mildly-modded daily driver
E36 M3 - new toy!
1990 240SR - screamed down the road...
Rittmeister is offline  
post #6 of 11 (permalink) Old 09-09-2006, 12:04 AM
No more SR :(
 
Join Date: Oct 2004
Location: Austin, Tx
Posts: 1,952
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Feedback Score: 8 reviews
I usually never go over 80 C when I'm moving, I've never seen over 90 C with my new fan setup even in 100+ deg. heat.

I am running about 70 / 30 with a Koyo and a 16" SPAL fan. The Silvia front end has quite a bit more open area compared to the pop up bumpers, and allows airflow that hasn't been passed through the intercooler to flow on the upper half of the radiator.

I'm going to build some ducting now that the weather is cooling off (the irony, lol). It blows working on a car when it's 100 degs. and 80% humidity outside.

95 BMW M3
217 HP / 204 TQ.
Nismo_Freak is offline  
post #7 of 11 (permalink) Old 09-09-2006, 12:13 AM Thread Starter
The Groove Master
 
Rittmeister's Avatar
 
Join Date: Apr 2001
Location: Cincinnati OH
Posts: 4,241
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Feedback Score: 15 reviews
(Thread Starter)
Does your car have AC? If not I think that could easily account for the temp differences. Also, what t-stat are you running, and what's the humidity like there?

And yes, the Silvia front is a happy thing for a number of reasons.

2002 Mazda Protege ES, mildly-modded daily driver
E36 M3 - new toy!
1990 240SR - screamed down the road...
Rittmeister is offline  
post #8 of 11 (permalink) Old 09-09-2006, 12:14 AM
No more SR :(
 
Join Date: Oct 2004
Location: Austin, Tx
Posts: 1,952
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Feedback Score: 8 reviews


Picture to illustrate the added area. Those slats in the middle of the bumper are open to flow as well.

I have no A/C and the humidity is usually 60%+, it is definately not a "dry heat".

95 BMW M3
217 HP / 204 TQ.
Nismo_Freak is offline  
post #9 of 11 (permalink) Old 09-09-2006, 12:24 AM Thread Starter
The Groove Master
 
Rittmeister's Avatar
 
Join Date: Apr 2001
Location: Cincinnati OH
Posts: 4,241
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Feedback Score: 15 reviews
(Thread Starter)
Quote:
Originally Posted by Nismo_Freak
Those slats in the middle of the bumper are open to flow as well.
.

I know, I've got the Silvia front too.

Another question - where are you measuring water temp? My fan controller reads the stock ECU temp sensor. Just curious, really.

2002 Mazda Protege ES, mildly-modded daily driver
E36 M3 - new toy!
1990 240SR - screamed down the road...
Rittmeister is offline  
post #10 of 11 (permalink) Old 09-09-2006, 12:44 AM
No more SR :(
 
Join Date: Oct 2004
Location: Austin, Tx
Posts: 1,952
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Feedback Score: 8 reviews
Quote:
Originally Posted by Rittmeister
I know, I've got the Silvia front too.

Another question - where are you measuring water temp? My fan controller reads the stock ECU temp sensor. Just curious, really.
Upper radiator hose, so my temps are pre-radiator.

95 BMW M3
217 HP / 204 TQ.
Nismo_Freak is offline  
post #11 of 11 (permalink) Old 02-12-2011, 12:46 PM
b13 bai
 
Join Date: Jun 2007
Location: south florida, ft laudy
Posts: 7
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
nice
jhope510 is offline  
Sponsored Links
Advertisement
 
Reply

  SR20 Forum > What's New > Technical Information Library > 240SX/S13/S14/RWD


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
User Tag List

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

 
For the best viewing experience please update your browser to Google Chrome