Thread: viscous-vs-electric fans

My 3.9 d1 ran a little high with thermos and over heated when towing put the viscous back on and no probs i vote the viscous is the way to go.

Viscous fans have a lot lot more HP behind them than electric fans.

Originally Posted by V8Landy

My 3.9 d1 ran a little high with thermos and over heated when towing put the viscous back on and no probs i vote the viscous is the way to go.

Politely suggesting something wrong with the set up.

I'm running a 400,000 km old Chev on gas behind a stock 3.5 RRC rad and have no probs with a fake EL twin thermo set up. If anything it runs too cool at times.

Really depends on where the switching is getting the signal from and at what temp.

cheers, DL

Go the viscous fan. To quote Slunnie, theres a lot more HP behind visous fans.
I thought about going electric with my 3.9V8, but after research definately staying with viscous.

Cheers

Originally Posted by leyland

e runs so cool that i think theres something wrong with temperature gauge. i can touch the top radiator hose without burning where as before i couldnt. i will replace the temperature sender anyway.

Might be that you have no Thermostat .... As usually they get removed in an attempt to keep it cool, when the radiator is blocked // Get it removed & rodded before Summer arrives

Electric fans are just that ... Folks are either "Fan" of em ... Others are not
You need to set them up right, to get the best out of them, which involves more than just bolting them in

Mike

Originally Posted by 350RRC

Politely suggesting something wrong with the set up.

I'm running a 400,000 km old Chev on gas behind a stock 3.5 RRC rad and have no probs with a fake EL twin thermo set up. If anything it runs too cool at times.

Really depends on where the switching is getting the signal from and at what temp.

cheers, DL

It was set up properly. I had the radiator roded cleaned ect no diff. Maybe some sort of prob elsewhere but it is fine the way it is so will not worry about it.

This old chestnut of a question will never go away - opinion is simply too greatly divided!!

Personally, I would (and do) always go viscous. Much more reliable and the viscous bit is fixable with a pair of the mrs' tights if need be!

I know the physics behind the increase power useage of viscous - but in reality its negligable on a 2.5t brick on wheels!

Viscous all the way!!

Jon

The only real advantage with the electric fans is you can easily make sure they are off for a water crossing and they wont destroy a radiator with the fan corkscrewing into it.
I prefer the viscous hub.
Andrew