Electric Fan using stock temp sensor

[idahotuner]

I have been reading the different ways people have hooked up there electric fans. i am going to use the diagram on the write up section of this forum Electric Fan Wiring – NICO Club (http://www.nicoclub.com/archives/electric-fan-wiring.html) but what i am wondering the stock sensor doesnt it work just as a thermostatic switch going to the ecu. so once the engine hits operating temp the coolant sensor closes and then send the signal to ecu letting it know its working at operating temp. around 170*

in the write up he uses a second thermostatic switch instead of running off the factory one, seems like i should be able to run off the factory one and when it hits temp it will turn my fans on at the same time the thermostat opens. i am planning on wiring them in tonight so an answer would be nice

this is for an sr20det

[Om1kron]

one of the wires goes to the ecu to let it know what the engine temp is. The other temp sensor is for the gauge cluster, nothing more, nothing less.

The only fans that are electric are controlled by your climate control unit. and has a low and high speed which is a whole other system I know nothing about.

High possibility neither are a thermostatic switch being the car runs a CLUTCH FAN from the factory that has a temperature sensitive spring that acts as a clutch and tells the fan when to spin based off of the HEAT the radiator is shooting at the fan through the shroud.

Hence why a clutch fan is USELESS without it's shroud.

This is why an separate thermostatic switch is used for electric fans if you go that route.

[idahotuner]

all right that makes sense, but my clutch fan would spin all the time .?

i will just pick up a thermostatic switch and put it in my water neck adapter

[Bigsyke]

Why would you need a thermostat switch for your Efans? It CTS or tripple pressure sensor controls when the relays are tripped. The Cooling fan Relay 1 turns on at 203*f and the Cooling fan relay 2 turns on around 211*f IIRC. You can plug your Efans into the 4 pin connector that the OE Efans pluged into.

its 4 wires because durring CFR1 only 2 wires are used, and when CFR2 is tripped all 4 wires are used. You can easily create butt connectors to plug right into the OE plug. Should take about 17 seconds not including crimping.

[Om1kron]

Why would you need a thermostat switch for your Efans? It CTS or tripple pressure sensor controls when the relays are tripped. The Cooling fan Relay 1 turns on at 203*f and the Cooling fan relay 2 turns on around 211*f IIRC. You can plug your Efans into the 4 pin connector that the OE Efans pluged into.

its 4 wires because durring CFR1 only 2 wires are used, and when CFR2 is tripped all 4 wires are used. You can easily create butt connectors to plug right into the OE plug. Should take about 17 seconds not including crimping.

If you removed your AC, you don't have a triple pressure switch anymore. it's the thing on top of the swirl pot under the intake manifold that goes into your low pressure ac line.

[idahotuner]

plus i would like my fans to kick on a little lower then that.

my car doesnt have ac. the motor doesnt even have PS right now. its stripped down to all it needs to run.

but the wiring is still there up to the relay and the plug so if i wire int othe plug then i can just hit the ac buton to turn the fans on but i only want that as an over ride. would like to have them kick on when the thermostat opens up, or with in 10* or so

[ryanw501]

does anyone know at what temperature the stock fan kicks on when controlled by the stock thermostatic switch?