[Supras] A/C booster fans

[Jim Jobe]

they are controlled by a temp switch in the t-stat housing in addition
to being activated with the a/c.  as for will they come on with the motor
off - yes, with the key off and out - not on my car.  How to change it -
add another temp switch and relay to provide power to the fans from the
battery.

all engines heat soak once they're shut off and the coolant will start
to boil if there is no additional pressure on it.  If the rad cap is
leaking the pressure in the cooling system will reduce to atm and the
coolant may start to boil - this is actually pretty common and not
much to worry about unless it spits coolant out past the rad cap.

On Tue, Aug 01, 2006 at 05:46:00PM -0400, Peter wrote:
> Id like to know the answer to your question about the fans being 
> thermostatically controlled and how to possibly convert. My stock set up 
> doesnt come on with the car off.
> It sounds like you are running at borderline temps and when you turn the car 
> off your going into boiling range. Either that or your rad cap is not 
> functioning like the previous responses indicated.
> 
> ----- Original Message ----- 
> From: "Eric Boeck" <eboeck at cogeco.ca>
> To: <supras at supras.com>
> Sent: Tuesday, August 01, 2006 8:35 AM
> Subject: [Supras] A/C booster fans
> 
> 
> > Hey Guys,
> >
> > Are those two little electric fans thermostatically controlled?  And do 
> > they
> > run if the engine is hot but turned off?  I ask b/c with this heat wave
> > going thru here, yesterday when I used the A/C (retro'd to 134a), then
> > turned off the car and came back 10 min later, the rad was boiling.
> > Literally boiling and just a-bubblin vapour out the overflow!!!!  Rad <
> > 10kkm, new cap, engine temp was normal.  All I can think is that heat 
> > built
> > up between the condensor and rad, and caused it to boil the fluid.
> >
> > Noooo, it's not a BHG.  Checked that a little while back (sniffer).  And
> > there is NO way you'd get this much bubbling with a BHG.  I mean a roiling
> > boil!!!
> >
> > Anyway, anyone retrofit a temp sensor to keep the fans on if the temp 
> > behind
> > / between the rad was over a certain amount?  Thinking I might need to do
> > that.  Set it for say, 80 deg C, and use a relay to keep those fans on 
> > until
> > it drops below that.
> >
> > LMK
> >
> > Eric
> > 91T
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