electric fan, radiator question

[fastfu]

I want to fit an electric fan on my r34 and get rid of the viscose one.

On my old supra i bought an aftermarket radiator and it had a threaded bung in it so that you could fit a fan switch for an electric fan.

does anyone know if there is anything like this available for the skyline as i don't really want to go cutting pipe etc.

[Marky_GTSt]

The Skyline allready has the temp switch for a fan as it operates the aircon fan if it gets hot.

I dont know where you would get a kit from, I guess a lot of motorsport companies will sell them, My question is, Why would you get rid of the stock fan ?

[infamous_t]

Why would you buy a lightweight flywheel/driveshaft/wheels?

Anyway, Spal & flex-a-lite are probably the two best around, one of the flex-a-lite models comes in a twin fan config in a perfect size for skyline sized radiators.
There's an existing temp switch sensor/bung on bottom passenger side of the radiator IIRC

[Marky_GTSt]

I see what your saying there infamous_t, but the fan serves a usefull function even while its mostly disengaged, im not sure the small gain of an electric fan outweighs the loss of the constant movement of air through the engine bay.

I might do the experiment one day as I happen to have an electric fan for my R33 kicking about. Just need a few of thermocouples.

[fastfu]

thanks guys

the main reason i want to do it is to make the car more efficient, the temperature has dropped over the last couple of weeks and with the viscose fan running all the time its taking ages to run up.

i dread to think what it will be like when winter comes in properly

[Marky_GTSt]

So your overcooling a bit ? fair enough then

On mine im sure the electric fan was just wired into the AC fan. they would both come on as the temp got up.

[fastfu]

do you know what temperature the ac fan cuts in ?

[infamous_t]

Originally Posted by fastfu

do you know what temperature the ac fan cuts in ?

Technically it's an engine overheat fan, triggered by the lower temp sensor I mentioned earlier.
On the R32 it kicks in around 90 deg.
If your thermo is a two speed fan, set it on low always (say ignition triggered), and have the ac/engine over heat fan trigger kick the thermo into high speed(flow) mode.

Do some temp logging to see if this setup works for you

There is also a diode trick for those still running AC to force that fan to come on with AC, which will help temps further

[Bigalow]

Originally Posted by infamous_t

Technically it's an engine overheat fan, triggered by the lower temp sensor I mentioned earlier.
On the R32 it kicks in around 90 deg.
If your thermo is a two speed fan, set it on low always (say ignition triggered), and have the ac/engine over heat fan trigger kick the thermo into high speed(flow) mode.

Do some temp logging to see if this setup works for you

There is also a diode trick for those still running AC to force that fan to come on with AC, which will help temps further

Infamous, I plan on removing the condensor and compressor but still keep the A/C - overheat - fan in the vehicle. Will pressing the "AC" button still activate the fan with the diode trick?

[bashman40]

Anyone done this on a R34? Where is the Blower rad fan relay for the R34 as it isn't in the fuse box next to the AC relay?

I'm referring to the link infamous_t has put up^

[Rarche2002]

I have taken the viscous fan off and still kept the ac I have a vented bonnet which does help with cooling but everything still works fine temps are all normal even when it's having a good thrashing

[mambastu]

What electric fan are you using ?

Cheers

Stu

[jasaircraft]

I was about to remove my stock electric fan as it weighs a bit and Im putting the car on a diet, but hearing it may help as backup in case of overheating Im overthinking it...
Although for drag racing I dont see why it should heat up... I could also buy those dogguard warning devices on ebay that sense heat from the blocks material not coolant and just turn the car off in case of overheat...

[Rarche2002]

Originally Posted by mambastu

What electric fan are you using ?

Cheers

Stu

I haven't mounted another fan just uses standard fan on the front of the rad as I said I've never had a heating problem with mine the ac does suffer in the heat as there is no viscous fan pulling air in but still works.