[DeTomaso] Overheating and fan directional theories

[Will Kooiman]

Asa,

I posted a long time ago, that I had a similar problem.

The previous owner had mounted sucker SPAL fans, mounted as pushers and
wired backward.  They rotated in the pusher direction, but they hardly
blew any air at all.  Don¹t people test this?

He also mounted it with curved metal tabs curled around the headlight bar.
 Serious redneck engineering.

I remounted them as suckers, wired them correctly, and attached them
directly to the radiator.  As suckers, they really move air.  As pushers,
they mostly just agitate the air.

I ran that way for years, and finally discovered that my car was
overheating because I had blown a fuse.  I had run for about 5 years in
Houston traffic with no working fans at all - without overheating.  I
pulled it off because my commute was largely 50mph or faster.  It didn¹t
overheat until I got stuck in traffic in 100 deg heat.


Will.

On 6/28/16, 6:34 PM, "DeTomaso on behalf of Asa Jay Laughton"
<detomaso-bounces at server.detomasolist.com on behalf of asajay at asajay.com>
wrote:

>Yes, the fan blades were not reversible as such due to how they were
>molded and mounted.  However, the manufacturer (Flex-a-lite) in this
>instance does supply just the fan blades in the opposite orientation.
>If you look at the photos it will probably help explain it.  I think I
>still have the other blades too.
>
>Asa  Jay
>
>
>Quoting Forest Goodhart <forestg at att.net>:
>
>> Asa, You should have been able to just remove the blades and turn
>> them around. That was the directions include when I installed Hayden
>> fans. Maybe not all brands will reverse though.
>>
>>       From: Asa Jay Laughton <asajay at asajay.com>
>>  To: detomaso at server.detomasolist.com
>>  Sent: Tuesday, June 28, 2016 1:54 PM
>>  Subject: [DeTomaso] Overheating and fan directional theories
>>
>> So, when installing the Fluidyne radiator in my Pantera, I decided to
>> mount the radiator in a slightly tilted forward position and mount the
>> fans on the back instead of the front.
>>
>> This was going to work well except the twin fan assembly I had didn't
>> have the proper vane curve on the fan blades to work from a puller
>> direction.  What I had to do was buy new fan blades and swap them out.
>>   You can see some of that on these pages, mid-way down:
>>
>> 
>>http://teampanteraracing.com/index.php?option=com_g2bridge&view=gallery&I
>>temid=57&g2_itemId=2469
>>
>> It all worked out well in the end and I never had any overheating
>> issues.  Some folks have just as good operation with rear facing
>> pusher fans mounted to the front of the radiator.  Either way should
>> work fine but you'll want to make sure the curve of the blades is
>> proper for the direction the fans will turn, otherwise they won't push
>> or pull as much air.
>>
>> Asa  Jay
>>
>>
>> Quoting Jeff Cobb <jeffcobb1 at me.com>:
>>
>>> WOULD SOMEONE PLEASE START A THREAD ABOUT OVERHEATING
>>> AND FAN ROTATIONAL DIRECTION THEORIES????
>>>
>>> Jeff Cobb
>>
>> --
>> Asa Jay Laughton - sent from somewhere other than home
>> ******************************************************
>> http://www.w7tsc.org/
>> http://www.teampanteraracing.com/
>>
>>
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>
>-- 
>Asa Jay Laughton - sent from somewhere other than home
>******************************************************
>http://www.w7tsc.org
>http://www.teampanteraracing.com
>
>
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