DeTomaso Mailing List: March 99, Message #8

First I should say that I live in arizona and need all the cooling help
possible.  I have seen 250degrees water and 290 degrees oil and had the carb
perculating gas out of the vent tubes.  I am also installing the condenser
in front of the radiator, which will make it even more difficult to keep the
engine cool.
My radiator is 14 1/2 inches high and about 29 wide.  I am mounting the fans
side by side and will have about 1 1/2 inches on each side where the sucker
fans will overlap the can of the radiator instead of the core.   I am just
in the process of mounting the fans and constructing a shroud, which will be
a circles of aluminum around the fan blades.  I am using two prema lite fans
rated at 2900 cfm pulling 9.3 amps each.  I am also putting a lot of effort
into closing off any openings in and around the radiator that allows air
that enters the grills to bypass the radiator/condenser.  This may be
overkill in other parts of the country but not in phoenix.

 Original Message -----
From: Richard Barkley <rbarkley@earthlink.net>
To: Multiple recipients of list <detomaso@realbig.com>
Sent: Saturday, February 27, 1999 10:05 AM
Subject: Re: Suck versus Blow (fans, that is)


><hopp@concentric.net> wrote:
>>I am in the process of redoing my cooling system and will share my view.
>>No question a sucker fan will work better than a pusher.
>>The flow that I think is needed is based on a simple assumption.
>>If the car is traveling at 30mph, I don't think it will overheat, there is
>>enough air passing through the radiator at that speed without the fans.
>>30mph is equivalent to 2600cfm per square foot of radiator.
>>Therefore you want to insall two sucker fan that will cover all of the
>>radiator and they  should be rated about 2600cfm each.  I am mounting 2
>>14inch fans in my car.  If anyone in the colder climate is interested in
the
>>Hall Meriha fans I have a pair that are like new, only 300miles on them
for
>>a reasonable price.
>
>While more is always better, 2 x 2600cfm is much more than needed for a
>"normal" Pantera. I redid my cooling last year (see my post in
>316.Overheating (17) in the April '98 archives for a summary) using a 5
>core louvered Modine core and a single Flex-a-lite "Black Magic" fan. The
>Black Magic is rated at 2800 cfs at 13.9 amps. It is a sucker 15" with a
>16" square shroud that spaces the blades about 2 in. from the radiator
>which is why I believe it is so efficient. It is designed for (among other
>things) 5.0L Mustangs. Anyway, with a good core, it has more than enough
>capacity. I did a number of tests using a digital thermometer on the return
>cooling line (to measure the temp drop through the radiator) as reported in
>my post. Based on them, I estimated that the 180 deg thermostat would fully
>open at 90-95 deg air temp. So at 120 air temp, the engine would be 210 or
>less.
>
>The reason I said "normal" above is that I did my tests at about 800 rpm
>idle speed. At 1200, the heat load would be 50% more! This is one reason I
>think many Panteras overheat esp. with the standard fans.
>
>Also, how are you fitting 2 14" fans on the back of a radiator core that's
>only 16" x 25"? Or are you doing a push/pull?
>
>
>Sincerely,
>Richard Barkley
>
>To Ski or not to Ski, that is the question!
>
>Richard Barkley
>(310) 373-6695 (home), 813-2432 (work)
>E-mail: richard.barkley@trw.com (work), rbarkley@earthlink.net (home)
>Mammoth Condo 2BR+loft/3Bath - Horizons 4 #186 (760) 934-6758
>Condo web address: http://home.earthlink.net/~rbarkley
>
>
>
>
>