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Location:
Brisbane
Registered:
February 2003
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temp controller for thermo fan?
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Mon, 05 January 2004 03:14
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i've got two fans (12" and 16" Davies) inside the bay of the 18R turbo RA40 (just) - and am looking for a temp switch to control the larger fan? the smaller fan runs 100%.
i've got a mechanical thermostat that gets shoved inside the upper radiator pipe where it attached to the top tank - but it tends to leak under pressure (was bought with larger fan) plus it's bulky hardware.
has anbody know of simple controller that uses electrical sensor?
i recall seeing a DIY kit on autospeed that used a sensor mounted in the airflow to control a fan but cannot find any temp-control kits on their site now.
at the moment i'm manually driving the fan from inside car- but it's a pain at times plus at night you gotta search in the dark for the switch.
do any of the newer (e.g. post 18R) engines use a simple thermo switche to drive thermo-fan relays? I could put a T-conntector at the current temp gauge sender and have two sensors - but would prefer using a sensor that can sit in air flow or be bolded to the head near the front ofthe engine.
tia,
charles.
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I supported Toymods
Location:
Australia
Registered:
November 2003
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Re: temp controller for thermo fan?
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Mon, 05 January 2004 03:41
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Are you running aftermarket management?
Most can control a thermo at a set temperature
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Location:
Brisbane
Registered:
February 2003
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Re: temp controller for thermo fan?
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Mon, 05 January 2004 03:49
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| CrUZsida wrote on Mon, 05 January 2004 13:41 |
Are you running aftermarket management?
Most can control a thermo at a set temperature
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no ECU at present - is suck-thru carbi infront of a T03/05 hybrid turbo - only computer in the car is inside the stereo.
am going to megasquirt-n-spark it once i get a custom intake manifold made but it will only control spark+fuel.
but until then ...
charles.
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I supported Toymods
Location:
Australia
Registered:
November 2003
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Re: temp controller for thermo fan?
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Mon, 05 January 2004 03:53
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Try Jaycar
They have a lot of car kits that can do some cool stuff, otherwise, just make sure the radiator doesnt leak
I used a helluva lot of gasket goo on mine to prevent leaks.
It leaks a bit when cold, but once its warm, its all good
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Location:
Melbourne
Registered:
May 2002
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Location:
Terrigal
Registered:
May 2002
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Re: temp controller for thermo fan?
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Mon, 05 January 2004 04:21
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Mate i've done this plenty of times.. If you go to auto one or somewhere they sell thermo fan switches. You need to tap it into the water supply somewhere. On my car I had a sensor that wasn't being used around the thermo stat and put it there. Other times i've had a threaded nut welded to the radiator to tap it into.
Anyhows.. They are around $40 and you can pic the on/off temp. I got one that switches on at 85 deg and off at 80 deg. It just had 1 terminal on it that i've got wired up to earth a relay for the fan.
Easy and neat! So much better than those crappy davies craig devices.
Cheers
Joel
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Location:
Brisbane
Registered:
February 2003
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Re: temp controller for thermo fan?
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Mon, 05 January 2004 05:25
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joel: these are about the same size as the temp gauge sensor?
i'm wondering if there's something i can pull off the (currently unused) 1G GTE? it's got a temp switch for the cold-start injector - but i would have to re-jig the wiring so the relay triggers when the sensor goes O/C - but i think the switching point would be a bit low for what i'm after?
allan: yep... they look pretty damn good but when you convert it to AUD it's $105 plus freight (or should that be fright?) ... tho, it's just the kind of gadget-like thing i'd like... 
ta,
charles
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Location:
Terrigal
Registered:
May 2002
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Re: temp controller for thermo fan?
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Mon, 05 January 2004 05:38
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Yeah they look almost identical to a temp sensor.
Did the 1G have electric thermos or clutch fan? I don't know the 1G well, but the 4AGE from the AE82 corolla has electric thermo fans standard, so has a sensor in the remote thermostat for this. Whereas the 3t-gte had a clutch fan so no sensor that would work.
Cold start switching would be around 20 degrees from memory.
So you could get a switch from a 4age fwd corolla.. I'm sure there is heaps of other cars that have this switch also, but then I figure most newer ones the ECU would switch the fan on.
Cheers
Joel
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Location:
Brisbane
Registered:
February 2003
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Re: temp controller for thermo fan?
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Mon, 05 January 2004 06:05
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| TurboRA28 wrote on Mon, 05 January 2004 15:38 |
Did the 1G have electric thermos or clutch fan? I don't know the 1G well, but the 4AGE from the AE82 corolla has electric thermo fans standard, so has a sensor in the remote thermostat for this.
<big snip>
So you could get a switch from a 4age fwd corolla.. I'm sure there is heaps of other cars that have this switch also, but then I figure most newer ones the ECU would switch the fan on.
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the 1G i've got had thermo fans - and the wiring diagram i've got has no switching of fans - so maybe i've got a suitable temp switch out in the garage (and also slaps self in back of head for not thinking of this earlier)?
otherwise (and as i'm on holidays) it's off the wreckers wheneveriwantto 
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I supported Toymods
Location:
Australia
Registered:
November 2003
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Re: temp controller for thermo fan?
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Mon, 05 January 2004 06:20
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A lot of cars had the thermo controller built into the base off the radiator (bottom tank), its prolly there
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