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Old 10-11-2013, 01:17 AM   #1
panel
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Default Adding a fan to the intercooler with the stock ECU?

Is there anyway to add a fan to a TMIC and have the stk ECU trigger the fan ? If not what's the best way to trigger it ? This is not in a Subaru. This motor is going in a Vw bus. See my conversion if you have any questions.
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Old 10-11-2013, 01:17 PM   #2
clegg318
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Why not wire one in with a thermal switch that triggers it at what ever temp you so choose to get?
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Old 10-11-2013, 01:59 PM   #3
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^^^ +1
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Old 10-15-2013, 02:30 AM   #4
panel
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Originally Posted by clegg318 View Post
Why not wire one in with a thermal switch that triggers it at what ever temp you so choose to get?
Any ideas on what/where to locate a switch ?
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Old 10-15-2013, 03:16 PM   #5
clegg318
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They're usually thermal probes that you could stick in between the fins and when the intercooler gets heat soaked and surpasses the triggering temperature the fan will kick on
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Old 10-15-2013, 03:37 PM   #6
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I am also lurking in this forum for an answer to this question. My problem with a straight temperature solution is, how do I keep it from running while the car is in motion (and does it matter). Is it simply a matter of setting the temp for an unreachable environmental target, 130F for example? How much cycling on/off would occur as the fans cool down the IC at a stop? Everything I've read is that beyond 5-10mph, the IC temps drop quickly.

I keep coming back to somehow tapping in to the brake light circuit and switching from there. Foot on brake/fans come on. The caveat here is somehow creating a delay, so touching the brakes on the highway wouldn't trigger the fans.

It also bears saying that if I were a superhero, electrical projects would be my kryptonite. Hence the unfinished project.

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Old 10-16-2013, 09:59 AM   #7
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I think your kryptonite is that your over complicating things
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Old 10-16-2013, 12:28 PM   #8
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I think your kryptonite is that your over complicating things
Have we met? Or have you only been talking to my wife?
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Old 10-16-2013, 01:15 PM   #9
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There is a intercooler spray "box" that drives a relay to turn on a spray pump, but can turn on a fan just as well. This is made by an australian company called autospeed.
I had this as a sprayer on my car for a year.

It uses two thermistor probes, one for reference, one to be inserted in the fins of the intercooler and you have to tap into the signal of one of the injectors, for the box to get a injector duty cycle signal.

This worked 80% of the time for me.

Then, there was a thread with somebody that installed 3+ computer cooling fans on top of the intercooler and had a temperature reading display, then made all kinds of cuts and drilled holes into the hood and had several more of the temperature gauges.

In the end, he discovered that the fans did work but with the cut-outs he made in the hood.
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Old 10-16-2013, 03:14 PM   #10
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I fell down the turbo blanket/downpipe wrap rabbit hole while researching thermistor/relay options on Amazon. Looks like I might unload my two unused SPAL fans after all.
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