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Old 02-25-2008, 04:31 PM   #1
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Default Thermostatic Electric Radiator Fan Control

http://www.midwayautosupply.com/pm-1...-kit-3651.aspx


Anyone have any experience with this or something similar?


I currently have my fans in parallel, how will this all work once I get my A/C back up and running?
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Old 02-25-2008, 04:50 PM   #2
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why is running one of these better than just letting MS hit that ****?
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Old 02-25-2008, 04:53 PM   #3
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Im getting my MS as a piggy back.
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Old 02-25-2008, 09:51 PM   #4
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Anyone else?
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Old 02-25-2008, 11:13 PM   #5
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If he add's fan control to your MS all he has to do is connect oen extra wire for you to be able to control your fans with on and off temps in megatune. Much easier and cheaper than that unit. Works in piggyback or standlone form.
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Old 02-25-2008, 11:27 PM   #6
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what are you trying to achieve in general?
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Old 02-26-2008, 09:23 AM   #7
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Quote:
Originally Posted by cjernigan View Post
If he add's fan control to your MS all he has to do is connect oen extra wire for you to be able to control your fans with on and off temps in megatune. Much easier and cheaper than that unit. Works in piggyback or standlone form.
I didnt know that, thanx.

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what are you trying to achieve in general?

I would just like to have my fans come on sooner. I have a secondary temp gauge with the sensor in the heater hose out from the engine and by the time the fans come on the temp is between 225-230. Obviously much higher than in front of the engine where the fan control is.

Scott can you add the fan control to my MS?
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Old 02-26-2008, 10:14 AM   #8
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I think the OE theremoswitch is on at 97c for the 1.6 - so that's a BIG disparity in temps- providing both sensors are correct. What does you're OE gauge read? It's right there at the back of the head.

You could also swap your secondary sender location with the OE gauge and see what it reads there. OR If you're not running a coolant reroute, there's plenty of room to drill and tap the rear coolant cap (back of the head) and put the fan thermoswitch there.

I'm curious about the disparity. I think either your secondary gauge sender is off or your fan thermoswitch is off.
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Old 02-26-2008, 10:34 AM   #9
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Yeah i can add the fan mod, you can turn them suckers on when you damn well choose.

but like Rob said, they should be switching on at 207F at the thermostat neck.
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Old 02-26-2008, 10:38 AM   #10
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Quote:
Originally Posted by m2cupcar View Post
I think the OE theremoswitch is on at 97c for the 1.6 - so that's a BIG disparity in temps- providing both sensors are correct. What does you're OE gauge read? It's right there at the back of the head.

You could also swap your secondary sender location with the OE gauge and see what it reads there. OR If you're not running a coolant reroute, there's plenty of room to drill and tap the rear coolant cap (back of the head) and put the fan thermoswitch there.

I'm curious about the disparity. I think either your secondary gauge sender is off or your fan thermoswitch is off.

The OE gauge never reads higher that 11 maybe between 11-12. Now what that means in #'s I dont know. What does the fan switch have to see in order to turn the fans on? Is the fan switch connected to the temp gauge at all? I assume that when the fan switch see's 207F it turns the fans on but by that time the temp in the back of the engine is 225F. Which is why some do the coolant reroute? I would just like the fans to come on when the back of the engine reaches 207F.
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Old 02-26-2008, 10:39 AM   #11
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How will having the MS control the fans affect the A/C?
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Old 02-26-2008, 10:41 AM   #12
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its simple enough, ill add that to your MS, you can switch it to whatever you want. Just unplug the thermoswitch and choose your values in Megatune. like 207 on, 197 off.

it shouldn't, the when the a/c clutch kicks it, it grounds the second fan as well like normal.
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Old 02-26-2008, 10:54 AM   #13
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Quote:
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its simple enough, ill add that to your MS, you can switch it to whatever you want. Just unplug the thermoswitch and choose your values in Megatune. like 207 on, 197 off.

So does the MS just hook right up to the switch in the t-stat housing.
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Old 02-26-2008, 10:55 AM   #14
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Quote:
Originally Posted by Braineack View Post
its simple enough, ill add that to your MS, you can switch it to whatever you want. Just unplug the thermoswitch and choose your values in Megatune. like 207 on, 197 off.

it shouldn't, the when the a/c clutch kicks it, it grounds the second fan as well like normal.

Even if the fans are wired in parallel. I have my fans wired the ghetto way.
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Old 02-26-2008, 11:11 AM   #15
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haha, i dunno then. most likely not, you took the ground form the a/c and moved it to the cooling side? then no it will never kick on with the a/c. something cool you could do would be to remove the ground from the a/c fan and route it directly to MS ouput and control just that fan, and allow the thermoswitch to control the main cooling fan whenever...easiest thing i can think of without thinking too hard.
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Old 02-26-2008, 11:19 AM   #16
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Old 02-26-2008, 11:23 AM   #17
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Maybe there is that much disparity from the front to the rear of the head w/o reroute. Would certainly justify a reroute IMO. Move the OE thermoswitch to the back of the head. I think I've got a spare cap so you could do it w/o bringing the car "down", then just swap them out and plug the front bung. I did the same thing on my NB way back for a mechanical temp sensor- so I know it can be swapped with engine in the car. You can see the spot in this photo- just below the bung going to heater hose, above the lower nut.
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Old 02-26-2008, 11:40 AM   #18
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Thats a great idea, but with the MS I could just set the fans to come on at around 185 which should put the back of the engine at around 205 ish.

Now I just need to figure out what to do about the fans once I get the A/C running.

Anyone else running A/C with their fans in parallel?
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Old 02-26-2008, 12:08 PM   #19
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I'm nearly positive there's a wiring diagram on m.net (or a link) for setting the fans to work with both circuits- so that either (a/c or thermoswitch) can trigger them. I can't recall at the moment how the a/c fan is triggered - but knowing that would start the process for a wiring solution.
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Old 02-26-2008, 01:23 PM   #20
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have fun:

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