V8 temp

I have a TIM electric temp guage in my V8 90. It has twin electric fans with
a Kenlowe temp switch. At the mo I have it set so the fans come on at 80°C.
Does anyone know if this is correct or should it be set higher?
Thanks
Richard
http://www.richardsrovers.pwp.blueyonder.co.uk/

"Richard" <richardsemail [email protected]> wrote in message
news:[email protected]...
>I have a TIM electric temp guage in my V8 90. It has twin electric fans
>with a Kenlowe temp switch. At the mo I have it set so the fans come on at
>80°C. Does anyone know if this is correct or should it be set higher?
> Thanks
> Richard
> http://www.richardsrovers.pwp.blueyonder.co.uk/
>
Your thermostat will either be an 82 or 88 degree unit I'd imagine, so
there's not a lot of point in bringing the fans on before the thermostat is
allowing water flow, and I can't see any value in keeping the fan running
until the water temp reduces so much as to allow the thermostat to close
off. I'd try 85 or 90 degrees and see how it goes from there.
BTW, FWIW, there is NO electric fan setup currently available that can
control and maintain a relatively constant temp the way that a properly
operating viscous fan can, and contrary to popular belief, there are
virtually no savings to be made either. All marketing hype. The sum of the
energy losses (as heat) during the conversion of mech. to elec. and back
again (alternator producing electricity to drive fan motor) are greater than
the losses due to drag when the viscous unit is actually driving the fan up.
Badger.

The thermostat is an 82°C one. I'll try and set it to about 90°C tomorrow.
The main reason for the the electric fans is to be able to turn them off
when wading. Also when I fitted the auto box the oil cooler sits where the
viscous would be.
Thanks
Richard


"Badger" <[email protected]> wrote in message
news:[email protected]...
>
> "Richard" <richardsemail [email protected]> wrote in message
> news:[email protected]...
>>I have a TIM electric temp guage in my V8 90. It has twin electric fans
>>with a Kenlowe temp switch. At the mo I have it set so the fans come on at
>>80°C. Does anyone know if this is correct or should it be set higher?
>> Thanks
>> Richard
>> http://www.richardsrovers.pwp.blueyonder.co.uk/
>>
> Your thermostat will either be an 82 or 88 degree unit I'd imagine, so
> there's not a lot of point in bringing the fans on before the thermostat
> is allowing water flow, and I can't see any value in keeping the fan
> running until the water temp reduces so much as to allow the thermostat to
> close off. I'd try 85 or 90 degrees and see how it goes from there.
> BTW, FWIW, there is NO electric fan setup currently available that can
> control and maintain a relatively constant temp the way that a properly
> operating viscous fan can, and contrary to popular belief, there are
> virtually no savings to be made either. All marketing hype. The sum of the
> energy losses (as heat) during the conversion of mech. to elec. and back
> again (alternator producing electricity to drive fan motor) are greater
> than the losses due to drag when the viscous unit is actually driving the
> fan up.
> Badger.
>

Badger wrote:

>>
>>
>Your thermostat will either be an 82 or 88 degree unit I'd imagine, so
>there's not a lot of point in bringing the fans on before the thermostat is
>allowing water flow, and I can't see any value in keeping the fan running
>until the water temp reduces so much as to allow the thermostat to close
>off. I'd try 85 or 90 degrees and see how it goes from there.
>BTW, FWIW, there is NO electric fan setup currently available that can
>control and maintain a relatively constant temp the way that a properly
>operating viscous fan can, and contrary to popular belief, there are
>virtually no savings to be made either. All marketing hype. The sum of the
>energy losses (as heat) during the conversion of mech. to elec. and back
>again (alternator producing electricity to drive fan motor) are greater than
>the losses due to drag when the viscous unit is actually driving the fan up.
>Badger.
>
>
>
>
More than happy with my twin Kenlowe setup. Each to their own I guess.

Richard


--
Real email address is RJS at BIGFOOT dot COM

The information contained in this post
may not be published in, or used by

http://www.diyprojects.info

"Richard" <richardsemail [email protected]> wrote in message
news:[email protected]...
> The thermostat is an 82°C one. I'll try and set it to about 90°C tomorrow.
> The main reason for the the electric fans is to be able to turn them off
> when wading. Also when I fitted the auto box the oil cooler sits where the
> viscous would be.
> Thanks
> Richard
>
>
Oil cooler should really be in front of the radiator, otherwise it isn't
really having much of a desirable effect.
Badger.

> BTW, FWIW, there is NO electric fan setup currently available that can
> control and maintain a relatively constant temp the way that a properly
> operating viscous fan can, and contrary to popular belief, there are
> virtually no savings to be made either. All marketing hype. The sum of the
> energy losses (as heat) during the conversion of mech. to elec. and back
> again (alternator producing electricity to drive fan motor) are greater
than
> the losses due to drag when the viscous unit is actually driving the fan
up.
> Badger.

I don't know about the V8 setup specifically, but the saving is supposedly
to be made as the electric fans are only needed when the vehicle is moving
relatively slowly (or obviously stationary) and should defiantly not be
needed at cruise speed. That said, bmw are very big fans of viscous fans
(sorry about the pun!) and I think any trade off in energy usage is probably
off set by their reliability.
Toby

On or around Mon, 6 Dec 2004 00:19:42 -0000, "TVS"
<[email protected]> enlightened us thusly:

>> BTW, FWIW, there is NO electric fan setup currently available that can
>> control and maintain a relatively constant temp the way that a properly
>> operating viscous fan can, and contrary to popular belief, there are
>> virtually no savings to be made either. All marketing hype. The sum of the
>> energy losses (as heat) during the conversion of mech. to elec. and back
>> again (alternator producing electricity to drive fan motor) are greater
>than
>> the losses due to drag when the viscous unit is actually driving the fan
>up.
>> Badger.
>
>I don't know about the V8 setup specifically, but the saving is supposedly
>to be made as the electric fans are only needed when the vehicle is moving
>relatively slowly (or obviously stationary) and should defiantly not be
>needed at cruise speed. That said, bmw are very big fans of viscous fans
>(sorry about the pun!) and I think any trade off in energy usage is probably
>off set by their reliability.

I had an electric one on the 110, on a switch, but one hot day the motor
went kaput and left it with no fan at all. reverted to a plain
engine-driven one after that.

'course, viscous ones *can* fail into non-spinning mode, but that IME is
pretty unusual, most of them seem to do the opposite and spin too much,
which is unlikely to damage the engine.