[DeTomaso] Pusher Fans with stock fan brackets

[Charles Engles]

Dear Rob,


            During the Mid Continent heat storm of the summers of 2011 & 2012, the ambient temperatures here were 100--110 degrees Fahrenheit.

            My Pantera has a 485 HP engine cooled with an old school brass radiator about twenty plus year old with Mariah fans.  In the midst of the hideous heat, I would drive my Pantera. A friend with a Diablo would NOT drive his because it would overheat.  The temp in Oklahoma City traffic, which is less congested than Houston, SanDiego, LA or Vegas, would be about 200 when stopped and idling.  At street and highway speed it was 195.  

           As Mike says, if you have the cooling fundamentals under control, then the Mariahs can be quite adequate.  I think the observations that the suckers are better in city traffic at low speeds and the pushers are better at speed are probably correct.

            FWIW.


                         Warmest regards,  Chuck Engles




-----Original Message-----
From: DeTomaso [mailto:detomaso-bounces at poca.com] On Behalf Of Rob Dumoulin
Sent: Tuesday, August 18, 2015 2:47 PM
To: 576103
Cc: Pantera - DeTomaso Mail List
Subject: Re: [DeTomaso] Pusher Fans with stock fan brackets

Mike,

I currently have the original stock fans which are not up to the task to even cool a tired 351.  It almost pegs the needle in traffic though never overheated before I pulled off to cool down. There are bleeders on the top of the radiator and the intake manifold ensuring no air. I live in the Florida heat and plan to rebuild/replace the engine to a much higher standard. Upgrades are necessary as a piece of mind an investment in not having to rebuild my motor or get stranded overheated.

The new fans are Spal 1650 CFM (x2).  I do not mind the investment, actually enjoy working/fabricating on my cars, but absolutely hate doing things twice.  Who has time for that?  That is why I love you guys!  Beers for everybody



On Tue, Aug 18, 2015 at 3:10 PM, <MikeLDrew at aol.com> wrote:

>
> In a message dated 8/17/15 10 41 11, rob at dumoulins.net writes:
>
>
> What does the collective say?
>
>
> >>>I don't know about what others might think, but I wonder what kind 
> >>>of
> fans you currently have, and what you are hoping to achieve by 
> changing them?  I have never seen a fan that works any better or is 
> any more effective than the Hall Meriah pusher fans, which neatly fit 
> into the stock brackets.  Coupled with your stock replacement Hall 
> radiator, as long as the system is in proper working order (i.e. all 
> the air is bled out), they are more than adequate to allow you to run 
> at no more than 200 degrees or so in triple digit ambient 
> temperatures.  While you could perhaps do a bunch of work and spend a 
> bunch of money fitting some other kinds of fans, which might even 
> boast superior CFM performance, it's unlikely you'll see any 
> appreciable change in actual radiator cooling performance, so doing so would just be a fashion exercise?
>
> Mike