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Getting enough air flow for AC!! |
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304-dude
AMC Addicted Joined: Sep/29/2008 Location: Central Illinoi Status: Offline Points: 9082 |
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I have checked this thread a few times to see how things go, are going.
The only improvement from Taurus vs Contour is fitment. Having a shroud that covers and incloses the fin area without leaving gaps for free air to be pulled. Multiple speed fans can be a bonus over single speed, but it's about cooling efficiency of the radiator. Small radiators need a bit extra CFM to force heat away. Unfortunately depending on surface area restriction of the fin openings, air flow may not come close to fans CFM capabilities. Our Honda Accord has two single speed fans. Low speed for minor cool down and AC, and high speed for fully warmed up temperature stability. In humid areas above 100°F while idling with AC on, radiator temps climb to very hot. Being that, a pusher fan may be required, or a higher CFM rated fan. Swapping the multi speed fan from the Taurus may help, but will require extra wiring if not already using such a setup. Another option is thermostat. A lower rated one may help. 180 degrees would be a starter. Edited by 304-dude - Sep/07/2017 at 8:02am |
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71 Javelin SST body
390 69 crank, 70 block & heads NASCAR SB2 rods & pistons 78 Jeep TH400 w/ 2.76 Low 50/50 Ford-AMC Suspension 79 F150 rear & 8.8 axles Ford Racing 3.25 gears & 9" /w Detroit locker |
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73hornut
AMC Addicted Joined: Jul/03/2007 Location: Southern Oregon Status: Offline Points: 3130 |
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71 Javelin
74 Gremlin 79 Spirit AMX Rogue Valley Rumblers Like Us on FB https://www.facebook.com/groups/1602825606650796 |
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farna
Supporter of TheAMCForum Moderator Lost Dealership Project Joined: Jul/08/2007 Location: South Carolina Status: Offline Points: 19675 |
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What I'm planning to do is wire the low speed to turn on with AC and one temp controller, the high speed to come on with a second controller set about 10 degrees higher.
Are BOTH your fan motors three wire? Only one of mine has three wires, the other only two. That makes me think only one is a two speed. Came from a 1999 24 valve Contour. |
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Frank Swygert
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304-dude
AMC Addicted Joined: Sep/29/2008 Location: Central Illinoi Status: Offline Points: 9082 |
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Farna, they come with 1 low speed and the other is 2 speed.
If yours is pulled from a wrecker, there should be a resistor box mounted to the bottom corner near the two speed fan. If new replacement you may need to order a F5RZ8L603AC resistor for controlling the two speed fan. If adding an extra 2 speed fan, one would have to make provisions to use another resistor box. The 2 speed fan is a misnomer, it Is actually a high speed fan. The resistor controls a low speed via relay. Very simple to wire up as it runs a two wire connector, not a three. There are some ebay fans that have the resistor installed, but half are sold without, even though one may be cheaper. The cost of the resistor is about $12.00 The connector is $10.00 The two speed relay is wired so that when no signal is sent to the switched input, the output is directly connected to the resistor, and operate in low speed. When a high signal is sent to the relay, the output is switched to 12v. I assume the resistor is tied high with the 12v used in switching with the fan's high speed connection. Low speed fan should kick in with A/C enabled. High / Low should be with engine temps ranges. I am thinking of setting up dual temp switches. One set at normal operating temp. Can use the signal to enable the 2 speed relay. When warm, relay is operational, and low speed is on constantly, until hot. Then, the secondary adjustable switch (set at 195) to override by enabling high speed. Very simple no need to use a controller. Edited by 304-dude - Sep/19/2017 at 9:03am |
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71 Javelin SST body
390 69 crank, 70 block & heads NASCAR SB2 rods & pistons 78 Jeep TH400 w/ 2.76 Low 50/50 Ford-AMC Suspension 79 F150 rear & 8.8 axles Ford Racing 3.25 gears & 9" /w Detroit locker |
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73hornut
AMC Addicted Joined: Jul/03/2007 Location: Southern Oregon Status: Offline Points: 3130 |
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My new contour fans have 3 wires for each motor, like the tarus fan motor. It also has a new resistor.I also ordered 14mmx1.5 bungs to weld into the radiator so the switch will be in the rad tank, much like most factory installed.
Edited by 73hornut - Sep/19/2017 at 6:00pm |
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71 Javelin
74 Gremlin 79 Spirit AMX Rogue Valley Rumblers Like Us on FB https://www.facebook.com/groups/1602825606650796 |
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Mopar_guy
Supporter of TheAMCForum Joined: Jun/07/2009 Location: Ohio Status: Offline Points: 4823 |
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I have mine both wired to high and I use this controller https://www.flex-a-lite.com/accessories/electric-fan-controllers/flex-a-lite-variable-speed-controller.html on it. My trinary switch is wired to it so it knows to kick up the speed if the A/C is calling for fans. No big load on the electrical system when they come on either.
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"Hemilina" My 1973, 5.7 Hemi swapped Javelin |
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farna
Supporter of TheAMCForum Moderator Lost Dealership Project Joined: Jul/08/2007 Location: South Carolina Status: Offline Points: 19675 |
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So it seems there are two versions, one with two two speed fans and one with a two speed and a single speed. Will have to see how the single speed pulls. I may just bypass the resistor and run the one on high al the time, the other on low... or whatever speed it is. Would have preferred a pair of two speed fans though. Mine came from a 1999 model. Maybe later ones have the pair of two speed, or depends on options? I know mine was the 24 valve (four valve per cylinder V-6) model. Didn't get engine size.
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Frank Swygert
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304-dude
AMC Addicted Joined: Sep/29/2008 Location: Central Illinoi Status: Offline Points: 9082 |
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Did some searching for you on some specifics.
Seems like many put the I4 dual fan setup in as 2.5 V6 in the specs. Looks the same but is not. The only way to be sure is to pull one yourself or look specifically to its fitment. The connector keeps it from being plug and play with an I4 if it is a 3 prong connector, and visa - versa. So if looking at specifics, It should state 2.5L V6 from 2000 down. No I4 should be listed. Now that I know better... I will keep that info on my list for when I make a purchase. It will also need further contemplation on how to set the fans, as there are 4 options on operation. Off, single low, dual low, low + high, and dual high. |
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71 Javelin SST body
390 69 crank, 70 block & heads NASCAR SB2 rods & pistons 78 Jeep TH400 w/ 2.76 Low 50/50 Ford-AMC Suspension 79 F150 rear & 8.8 axles Ford Racing 3.25 gears & 9" /w Detroit locker |
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