Thermo Fan for 80 series

[charterboat]

I am looking at options for increase power/ fuel economy on my 4.5litre petrol 80 Series (1995).

One is replacing the factory fan system with thermo fans.

Has anyone done it and what is the best way?

Problems i see is water crossings,dust etc on the electrics

Anyones advise or comments would be greatly appreciated

Thanks
charterboat

[80UTE]

Factory Toyota 4b's have great cooling systems standard , and cant be improved apon, a clutch/viscous fan does exactly what the cooling system need sucks real hard when needed and free runs as required. There is no way i would tamper with it, leave well alone and put the time money into tyres, suspension etc.

wally

[plowy]

the factory fan is a viscous type arent they

best to stick with it thermos can be more hassle than a fuel econemy prob

what size tyres is it running ?

auto or manual ?

is it regularly serviced ?

what consumption are you getting ?

[Toy80Diesel]

Yeah, as long as the viscous clutch is working as it should, its really the best thing and you should leave it.... but after a couple hundred thou km's, they can start playing up unexpectedly.
I had to change mine, at around 220km's.

[dumbdunce]

agree with wally, after having tried to "improve" cooling system performance with electric fans, the engine power gain is minimal (almost non existant) and there is usually a decrease in cooling system performace. There are a few ways to squeeze a little more power out of your engine (fiddle with the ignition timing + use expensive fuel, free flowing exhaust etc) but electric fans are a waste of time and money