Fan Controller Needed
Discussion
Can anybody help? I need a 12v fan controller that will support 2 * 5amp fans and has a suitable thermocouple / thermostat that will work within the temperature range of an air to air intercooler (30c to 150c) and is user adjustable RE fan switch temperature.
I don't want much do I!?
Cheers,
Rob
I don't want much do I!?
Cheers,
Rob
Marf said:
A fan controller is a fan controller. So long as the voltage output from your air temp sensor is similar, it will work.
Point taken! What I'm after is something that is going to allow adjustment via actual temperature reading. Without this it is going to be very difficult to set as the required temps will only be achieved when the car is under load. I'd like a system that displays the actual switching temperature (I can verify this against OBDII readout), that's why I was expecting a matched temperature / IAT probe.The car already has an IAT sensor but I have no idea how to take a feed from this without affecting the input it provides the ECU.
Cheers,
Rob
Personally I would have thought if intake temperatures were so high as to actually need an intercooler fan you would want it on all the time. In fact the only time you wouldn't need it was when the natural air flow was enough that the fan wasn't adding to it.
In other words you need it when the car is stationary or slow moving, regardless of the intake temperature or load.
With an intercooler you want to get the intake temperature to as near as ambient as possible, not to an absolute temperature.
As you say you could rig up a differential temperature controller so the fans come on at say 10C above ambient or, as in the article below, rig them so they come on when the natural air flow is low using the stock AFM or an air pressure switch.
http://autospeed.com.au/cms/title_Triggering-an-In...
Out of interest what's the application?
In other words you need it when the car is stationary or slow moving, regardless of the intake temperature or load.
With an intercooler you want to get the intake temperature to as near as ambient as possible, not to an absolute temperature.
As you say you could rig up a differential temperature controller so the fans come on at say 10C above ambient or, as in the article below, rig them so they come on when the natural air flow is low using the stock AFM or an air pressure switch.
http://autospeed.com.au/cms/title_Triggering-an-In...
Out of interest what's the application?
Mroad said:
Personally I would have thought if intake temperatures were so high as to actually need an intercooler fan you would want it on all the time. In fact the only time you wouldn't need it was when the natural air flow was enough that the fan wasn't adding to it.
In other words you need it when the car is stationary or slow moving, regardless of the intake temperature or load.
With an intercooler you want to get the intake temperature to as near as ambient as possible, not to an absolute temperature.
As you say you could rig up a differential temperature controller so the fans come on at say 10C above ambient or, as in the article below, rig them so they come on when the natural air flow is low using the stock AFM or an air pressure switch.
http://autospeed.com.au/cms/title_Triggering-an-In...
Out of interest what's the application?
Very good points. The application is an Exige 240pp. The intercooler suffers quite badly from heat soak and the roof scoop is restrictive. The ultimate answer is an air to water intercooler but at circa 2.5k is way over the top budget wise. Consideration of ambient is not so important as in the UK we're only looking at 10 to 30 degree range. I'd like a system that kicks at about 40 c so that under load or in traffic I can keep the IC temps down but without running the fans needlessly. My problem is finding an fan switch / IAT probe that I can set for a given temp.In other words you need it when the car is stationary or slow moving, regardless of the intake temperature or load.
With an intercooler you want to get the intake temperature to as near as ambient as possible, not to an absolute temperature.
As you say you could rig up a differential temperature controller so the fans come on at say 10C above ambient or, as in the article below, rig them so they come on when the natural air flow is low using the stock AFM or an air pressure switch.
http://autospeed.com.au/cms/title_Triggering-an-In...
Out of interest what's the application?
If I had the software then I'd quite happily map the 2nd IAT probe voltage to the OBDII and calibrate from there. Unfortunately I'm going to have to manually compare temps from both readouts then adjust the switching temp as appropriate. Hence the importance of something that gives me a temp readout that I can play with. It would not be the end of the world if it was voltage adjustable, just take more work to setup.
Cheers,
Rob
Cheers,
Rob
Edited by rjben on Monday 31st May 18:21
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