Any way to make the engine compartment fan turn on sooner?

[ninsei]

'looking to lower temps in there a little. How bout adding a resistor after the sensor?

[Loren]

How about cleaning radiators and adding a 3rd radiator?

Speeding up the fans is "after the fact" to me.

[ninsei]

How about cleaning radiators and adding a 3rd radiator?

Speeding up the fans is "after the fact" to me.

;-) I just cleaned the radiators (and boy they needed it). 'got the 3rd one, cause it's Tip.

[1999Porsche911]

Then sensor has a negative temperature coefficient which means resistance goes down as it heats up.

[Dharn55]

About 4-5 yeras ago when I started modding my 996 I wanted to add swtiches for both the radiator fans and the engine compartment fan using OEM TIP switches. I found a DIY on how to do it. It involved using Footwell light tip switches and a set of relays. This was required as the tip switches are not on/off switches but set up to use relays. I had printed out the DIY and actually bought the tip switches and the relays, but never installed them. Now I cannot find the binder I had all my early mod info in, and cannot find the DIY, having searched here and on Rennlist and 6 speed and on google. If anyone has knowledge of this DIY I would appreciate help in finding it.

[Richard Hamilton]

About 4-5 yeras ago when I started modding my 996 I wanted to add swtiches for both the radiator fans and the engine compartment fan using OEM TIP switches. I found a DIY on how to do it. It involved using Footwell light tip switches and a set of relays. This was required as the tip switches are not on/off switches but set up to use relays. I had printed out the DIY and actually bought the tip switches and the relays, but never installed them. Now I cannot find the binder I had all my early mod info in, and cannot find the DIY, having searched here and on Rennlist and 6 speed and on google. If anyone has knowledge of this DIY I would appreciate help in finding it.

Was it this or not?: http://www.renntech.org/forums/index.php?s...st&p=148785

[1999Porsche911]

http://www.renntech.org/forums/index.php?s...&hl=fan+mod

[Dharn55]

Richard Hamilton - That is it. Thanks for the link. My searches were on engine fans and radiator fan mods. Did not find it. Now maybe I will finally do the mod. I actually bought two relays and footwell light switches. I am using one of the switches to toggle the OBD from when I did that mod, but I bought a four stalk switch that I have not installed. Time to do that so I free up the tip switch. However, I think I am also using the light on the footwell switch to show when the spoiler is raised (another mod I did).

[70Sixter]

One other approach is a new lower temp thermostat.

http://www.lnengineering.com/lowtemperaturethermostat.html

[Dharn55]

I don't think the low-temp thermostat is going to make the car run cooler on an hot day. While is opens sooner to circulate coolant, once you reach operating temps the amount of cooling is going to be based on the surface area of the radiators and the amount of air passing over them, along with the amount of air flowing through the engine compartment. I guess on a cooler day the lower temp thermostat and the fans going on sooner may keep the temp below the 194 degrees of the stock thermostat.