Anita Barrett wrote:
>
> >Date: Mon, 27 Apr 1998 19:04:38 -0400
> >To: ritchie@mcn.org (Armand & Lorie Ritchie)
> >From: Anita Barrett <anitabrt@mindspring.com>
> >Subject: Re: under hood heat (dumb idea number101)
> >
> >At 09:22 AM 4/25/98 +0100, you wrote:
> >>Hi all I was thinking about our under hood heat problem with these tigers
> >>and I got an idea this morning. What if we install and electric fan that
> >>can be reversed by a dash board switch. So when we are stopped in traffic
> >>we could reverse the fan and blow that hot air from under the hood out the
> >>front of the radiator. Then when we get going again we could change
> >>directions of the fan so it works normaly. I think it would be better to
> >>remove the stock fan altogether so it doesn't interfere with the reversing
> >>of the electric fan. Any thoughts on this, do you all think this might
> >>work?
> >>
> >>regards Armand Ritchie
> >>
> >>ritchie@mcn.org
> >
> >Armand & Lorie Ritchie,
> > The rate of heat transfer from the radiator to the air
> >depends on the difference in temperature between the air and the
> >radiator. The bigger the difference, the higher the transfer rate.
> >If you pull air over the motor prior to passing through the
> >radiator, then the air temperature will be hotter than the air
> >that is normally passed from outside through the radiator.
> >Therefore the rate of heat transfer with reversed air (hot) should be less.
> > The need for moving air through the radiator is to remove the
> >heated air from contact with the radiator. Removing the air previously
> > in contact with the radiator allows cool air to come in contact with the
> > radiator and therefore have a higher heat transfer rate.
> > Secondary problem is that most fans are very inefficient
> >when running in reverse due to the shape of the fan blade
> >being designed to efficiently pass air in only one direction.
> >A fan blade running opposite the designed direction would provide
> >even less air through the radiator than the normal direction of the fan.
> > You would have more luck by putting an exhaust fan in a
> >hood scoop to remove the heated air from the rear of the radiator
> >(and from the motor somewhat) to allow cool air to flow through the
> >radiator from the front.
> > I have found that a light spray from a water hose will keep
> >my 351C cool when I am running it for long times in my driveway.
> >Maby you could rig up a few gallons of water in the trunk and
> >use a windshield wiper spray motor along with some sort of nozzle
> >in front of the radiator to keep your Tigers Cool in bad traffic.
> >Could add a pump switch, manual or thermal, that is on only when
> >your Tiger starts to get overly hot. You may need a needle valve
> >to limit the quanity of water sprayed. The correct amount of water
> >will be the maximum that the radiator can evaporate, so that no water
> > gets your motor wet.
> > ( While you are at it, there are also water injection kits available
> >to reduce the need for high octane gas)
> >.
> >Jim Barrett Tiger II 351C and others ( all cool in Florida)
> >
> >
I wonder if adding a drip irrigation system in the engine compartment
would do the trick.
--
Larry Allbritton
B9472723
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