Originally Posted by
DazzaTD5
A functioning viscous fan will lock up at low rpm and still draw far more air than aftermarket electric fans.
More demanding slow driving in heavy sand, where vehicle is moving slow but engine rpm are higher, again the viscous fan will be far better than electrics.
Land Rovers of old have always had a good cooling setup with the viscous fan and the electrics (twin on old, single on newer) that as mentioned turn on with temp and also with a/c on.
Regards
Daz
A VC, even when locked up, will depend on engine speed. An electric setup does not. Just about every vehicle made in the last ten years uses electric, and they all seem pretty reliable.
I appreciate that there are other factors in play these days. For example, BMW, of all makers, are fitting electric power steering, in order to meet emission standards. However, fans have been electric for far longer than that.
These days, with under bonnet temps as high as you will ever see them, and engines tuned to a state that would have been incredible even ten years ago, do you see VC fans? On a RR? On a Ferrari? Does Bugatti fit one to each of the ten radiators on a Veyron?
In fact, who uses a VC setup these days, anywhere?
Yes, some trucks still do. The R730 I was driving had one, and it needed the electric ones as well to help it on hills, because the load was high and the revs were low, and the revs were low because that's where the torque is.
Yank trucks use the Horton fan, and they are probably the most problematic device ever fitted to a vehicle ( well, unless it's a Freightliner ).
Sorry, you fail to convince me. And I must add, I didn't mention after market. The Ford fans are very good. Can't speak of others.
JayTee
Nullus Anxietus
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