Fans!!???

[Gaddy]

Hi all!!
Ive heard somewhere that removing the standard Fan and replacing it with a thermo fan or 2 can increase the power output of your engine and reduce fuel consumption!!
Any one know if this is true or not??

Cheers.

[wbute]

Yep, it will save power as the fan takes a fair amount of power to drive. Maybe a couple of horse power.
A viscous fan will help to a point as they only drive sometimes.
I think on something like a Cummins which runs a fan as big as the bonnet on a holden it makes more of a difference. They drag the engine down by about 350 rpm which is a heap on a motor that only revs to 2000 rpm.

[agr071]

The biggest problem i found was that the fans didn't actually cool the radiator down, they keep it more of a constant temperature.
This is why i much prefer the viscus style.

[Robbo]

I fitted twin thermo fan's to my 4.2 litre sandman ute,and they worked fine. I used it on all types of road's and all weather condition's and never had a drama. I had air conditioning and with the 7 blade fan removed, it was heap's quieter.

[agr071]

Where did your temp gauge sit Robbo?
Mine was 1/2 temp all the time, but since putting the viscus back on it's usually around 1/3.
I also found that when i turned the A/C on (in traffic) it got to 3/4.

[HZSandman]

My only advice is:

If your temp is good now why change and take the risk.

I have a standard fan and drove my van on Black Saturday in 47 degrees for an hour in normal city traffic and still did not overheat. No way I am changing anything to do with the cooling system.

[wbute]

The thermostat has more to do with what temp your engine runs. I have a 5 row radiator in my WB and had to try different temp thermostats to get it to run hot enough.

[Robbo]

Hi agr071, from memory it ran about 1/4 to 1/3 on the gauge,pretty much close to what it did before they were fitted. It just took a bit of fine tuning to get them to run spot on. I had them fitted mainly to get rid of the roar from the 7 blade fan. As you know there was not much insulation on the fire wall to keep thing's quiet in the cabin.

Cheer's.