Curt Sprenger Re: Engine Compartment Hot Air Exhaust Fan

[Gregory OConnor]

Kurt,Curt, I dont think the fan is used to cool the engine
components in the compartment it is used to move hot air out befor
the hot air loses heat to the compartment. The passive dynamics of
the air movement in the compartment must trap the heat in??????. I
thought of seeing what the result is if you closed off the side
vent and lifted the door slightly????? It seems as there is some
dynamic that traps the air????? I used PVC to house tail light wire
loom that passes the rear hatch door from taillight to tail light
and the pipe melted and saged 6 inches

One fan should do the trick. if the air pressure in the compartment
is too great at 70 mph 5 fans wont help . I wonder if blowing out is
the only way to do it since the rad fan opposit blows in???? The
other problem I see with just hanging a fan is ; without shrouding,
the fan has some'200% less air direction. If you add a shroud it
might exhaust air more effectivly.

GregoryO'Connor
94ptRomolandCa
--- In WanderlodgeForum@yahoogroups.com, "Curt Sprenger"
wrote:
>
> Kurt,
>
> I used one fan. Dick Hayden installed two fans and that picture is
his two
> fan install.
>
> No need to double up the wiring for two fans if they are to work
at the same
> time. For individual fan control add an on/off switch for one or
both fans.
>
> Thermostats are normally open.
>
>
>
> On Sat, Jun 28, 2008 at 7:28 AM, bumpersbird
wrote:
>
> > Curt,
> >
> > I was reading your file on (Engine Compartment Hot Air Exhaust
Fan
> > System).
> >
> > Did you set up one or two fans?
> >
> > In the text it describes a one fan set up but there are two fans
in
> > the pics.
> >
> > Would you clarify that for me?
> >
> > I really like the ability to change fan direction to pull or
push air
> > through the compartment. I didn't think of that. Brilliant!
> >
> > The fans I bought are capable of rotating in either direction so
I
> > would like to set them up that way.
> >
> > I'm guessing that the diagram of the relays, breakers, and
switchs,
> > should be installed twice to get full capability out of a two fan
> > system.
> >
> > I've got the fans built and mounted on the swing out grill right
> > rear, so all I need to do is set up the electrical end of the
system.
> > The picts are still on the home page under new photos. Pic #
62208-4
> > bumpersbird album.
> >
> > I have most of the parts to set it up including realy neat
adjustable
> > temp snap thermostats. I'm assuming that the the thermostats are
> > normally open?
> >
> > Any help or ideas on your experiance would be great. Thanks in
> > advance.
> >
> > The rest of you shade tree engineers are welcomed to throw in
your
> > ideas to :}
> >
> > Kurt Horvath
> > 95 PT-42 WLWB
> > 10AC
> >
> >
> >
>
>
>
> --
> Curt Sprenger
> 1987 PT38 8V92 "MacAttack Racing"
> Anaheim Hills, CA
>