My twin thermos pull heaps more air than the old viscous fan did, still waiting on my car (stuck on a truck in the townsville floods), fans run for around 30secs to a minute at a time in town, come on pretty much full time offroading, never a heat issue, and I live in Darwin, so not getting much warmer.Electric fans are fine on road cars, often the fans don't even come on except in city traffic, but try driving off-road/beach in summer with nothing but electric fans. I did this once and was bloody glad I had the mechanical fan still in the back of the Patrol, else it would have been 'all over, red rover'. No electric fan (designed for a car) can push the volume of air that a viscous fan is able to draw.
Cheers
Ray
I had twin Davies Graig fans and they simply couldn't push anywhere near as much air through the radiator, compared to how much the viscous fan could pull air through when things got really hot in low speed driving. Initially, it felt as if the electric fans would work just as good (onroad they were fine), but in the middle of summer, low range driving in the High Country, they couldn't cope. I'd hate for someone to install electric fans and then kill their engine when out in the boonies. If one wants to try this, keep the original fan in the car, just in case.My twin thermos pull heaps more air than the old viscous fan did, still waiting on my car (stuck on a truck in the townsville floods), fans run for around 30secs to a minute at a time in town, come on pretty much full time offroading, never a heat issue, and I live in Darwin, so not getting much warmer.
People speculating, please don't, if you have never run the system then u just don't know
I keep reading of people saying the Viscous fan pulls more air than an electric but I have not seen any numbers to support this. Does anyone have the CFM raqting of the OEM fan and/ or the CFM of electric fans from various vehicles such as a Dunny door Or foul can.
It would be interesting to compare the facts instead of just going on heresay.
I think that was likley the problem in itself. Fans are much more efficent when sucking through the rad than blowing through it.
If this wasn't the case, the OEM manufacturers would probably find it a lot easier to put them in front of the rad instead of behind the bumper where a lof of cars have considerable space instead of behind the rad where space tends to be much more scarce.
My twin thermos pull heaps more air than the old viscous fan did, still waiting on my car (stuck on a truck in the townsville floods), fans run for around 30secs to a minute at a time in town, come on pretty much full time offroading, never a heat issue, and I live in Darwin, so not getting much warmer.
People speculating, please don't, if you have never run the system then u just don't know