[DeTomaso] Adding sucker fans

[Joseph F. Byrd, Jr.]

Mike, do you recall the setting for your fan switches?

If you don't mind the opinion of someone who hasn't driven a Pantera in 30
years...
I think the fan switch should be about 20F (maybe even 30F) than the
thermostat AND be in the radiator outlet.  Thus for a 190F stat, the fans
should keep the returning coolant about 170F (160F)and cut off once there is
road speed air flow.  With the original vertical radiator baffling, both of
the switches were in the outlet and set for 15F and 30F below the 190F stat.
with the horizontal baffle the lower switch would always run the fan as it
was in the radiator inlet
Joe / 5177 

-----Original Message-----
From: DeTomaso [mailto:detomaso-bounces at poca.com] On Behalf Of Mike Drew via
DeTomaso
Sent: Sunday, July 05, 2015 21:17 PM
To: julian_kift at hotmail.com; rob at dumoulins.net; detomaso at poca.com
Subject: Re: [DeTomaso] Adding sucker fans


In a message dated 7/5/15 17 54 29, julian_kift at hotmail.com writes:
> 
> You are normally a man of rational thinking and explanation, so please 
> explain to me what advantage the sequential fans offer? The cooling 
> system is governed by a single thermostat, so what is the advantage of 
> a fan coming on at a temperature below that of the t-stat?
> 
> 

>>>Who said anything about coming on at a temperature below the thermostat?

As it is, I believe my low temperature switch is something less than
thermostat temperature, but it is positioned in the radiator at a point
where the water has already been cooled by the time it reaches it.

I know that when I'm driving my car down the freeway and it's getting full 
airflow, both fans are normally off.   If I am forced to slow down a bit, or

am just driving around in town at low speeds, the first fan will kick on, 
and that is sufficient to keep the car running at 180.   Only if I get stuck

in bumper-to-bumper traffic, or sit at a red light for a period of time,
does the second fan turn on.

I amuse myself by watching the fan light in the speedo when travelling in 
bumper to bumper traffic.   It will cycle on and off, turning off almost 
immediately when I reach speeds of greater than 25 mph or so, then coming
back on a minute or so after I'm stopped.

I hardly ever bother looking at the water temp gauge--the car just doesn't
get hot....

Mike