www.RX7fb.com

Thank you for the link very interesting Nick.
You are living in a very hot zone of the world. What you think about none air circulation in the engine room cause the car suddenly stop after highspeed drive. Heat is growing up and some seconds later the probe start the E-Fan.
Thomas

ian65 wrote:I think this is a debatable comment .... " For the most part, electric fans are not recommended as an upgrade unless you have a very specific reason to do so"

Nearly all modern car manufacturers these days install electric fans as OEM instead of viscous fans... when they put millions of pounds into vehicle design and development, presumably they come up with the most efficient components.

I'd take an e-fan over a viscous fan any day.

Also, by your own reasoning, Mazda put millions of um, Yen i suppose, into their viscous arrangement too!

Joe Blow wrote:

ian65 wrote:I think this is a debatable comment .... " For the most part, electric fans are not recommended as an upgrade unless you have a very specific reason to do so"

Nearly all modern car manufacturers these days install electric fans as OEM instead of viscous fans... when they put millions of pounds into vehicle design and development, presumably they come up with the most efficient components.

I'd take an e-fan over a viscous fan any day.

Also, by your own reasoning, Mazda put millions of um, Yen i suppose, into their viscous arrangement too!

yeah, back in the seventies.... time moves on, so does technology

spirit r wrote:Thank you for the link very interesting Nick.
You are living in a very hot zone of the world. What you think about none air circulation in the engine room cause the car suddenly stop after highspeed drive. Heat is growing up and some seconds later the probe start the E-Fan.
Thomas

Yeah, good question, well im no expert, but if the car was at speed before coming to a stop i would assume the radiator has already had a head start with cooling, and if everything was working properly, then the engine temp should have been correct the whole time?

Or do you mean to have the fan run on after you turn the engine off? That is an idea i have been thinking about, future mod might be one of those digital thermo switches which can actually do that I believe, as well as control an electric water pump (which also can keep running after shut down)
At the moment I just make sure i idle the car down until exhaust gas temps are as low as possible, and pop the bonnet (if in a safe area) when i park the car to let the air circulate as a safety measure against nasty turbo heat degrading my hoses , paint and other perishables.

quite a few modern cars have fans that over run to deal with heatsoak.... my Jaguar does it

Viscous was the way in the 70's, I think in the UK the cooling efficiency is not the number one factor. I put an e-fan on for reliability and peace of mind, a viscous unit 30 years old is probably knackered and will just cause belt slip and eventually belt failure, we see it time and time again.

Jesse ! What have you started

Lol, its turned into quite a little discussion!
But how many cars in the UK even have north/south engines since the 70's? Cant easily put a viscous fan on an east/west. Most modern longitudinally mounted cars still have viscous as the main fan dont they?

Joe Blow wrote:Lol, its turned into quite a little discussion!
But how many cars in the UK even have north/south engines since the 70's? Cant easily put a viscous fan on an east/west. Most modern longitudinally mounted cars still have viscous as the main fan dont they?

It is very hard to tell nowadays even if they have engines When you open the bonnet all you see is plastic cover/covers over everything, soon there wont even be a bonnet release catch, just a button you press that will automatically steer you to the Main Dealer :x :x

My 928 has both

it's interesting to get everyones view and opinions on it all.
Loads of UK market cars since the 70's have been rwd but fitted with an electric fan..... my last 3 cars all have been and my wifes car is also that layout... non have had viscous fans.
The thing these days is that the E-fan gives so much more control. As I said above, my modern car has the fan over run when the engine is turned off to deal with any heatsoak ( and a thrashed 4.0 supercharged V8 generates an immense amount of heat under the bonnet), it kicks in an extra fan when the a/c is on, the things that a viscous setup doesn't have the flexibility to do.