Mike, et al.
Yes, I remember covering the fan direction last summer and thus, after the
advice of the sage list, I changed the blade direction. I was unclear though
about this "puller" terminology that Mike explained so well.
Thanks,
Monte
----- Original Message -----
From: "Mike Janacek" <mjanacek@snet.net>
To: "MG-BBS" <mgs@autox.team.net>; "MonteMorris" <mmorris@nemr.net>
Sent: Friday, April 25, 2003 1:57 AM
Subject: Re: Late Fans (was Miata seats)
> Monte,
> A "puller" is a fan which is mounted between the radiator and engine,
> pulling air through the rad when operating, rather than "pushing" from the
> front of the rad as you and I now have.
> We covered the blade direction some time ago via this list and I defer to
> Blakes explaination on that (copied below).
>
> Mike
> '79B
>
> Monte:
>
> You and zillions of others have surcummed to the fan backwards, blows
> air backwards old wives tale.
>
> Placing the fan on backwards REDUCES some the effectiveness of the fan
> but the fan still pulls air through the radiator. Most fan blades are
> shaped like an airfoil and thus deliver less thrust when flipped over.
> This will only effect the cooling at low vehicle speeds where the fan is
> necessary. At vehicle speeds over 40 mph, the fan has no effect on the
> cooling.
>
> If the fan was running backwards, the direction of rotation must be
> changed. If a motor is DC, then sometimes just switching the power
> leads will reverse the direction of rotation.
>
> Blake
>
>
> ----- Original Message -----
> From: "MonteMorris" <mmorris@nemr.net>
> To: "Paul Root" <proot@iaces.com>; "MG list" <mgs@autox.team.net>
> Sent: Thursday, April 24, 2003 10:27 PM
> Subject: Re: Miata seats
>
>
> > Paul,
> > When you said aftermarket "puller" what did you mean? Last summer the
79B
> > was overheating and I determined (with the help of the list, of course)
> that
> > the fan blades were running backwards so I turned them around. It still
> > overheats
> > Does a "puller" mean it is supposed to run in the opposite direction
(and
> > therefore I need to turn them back around) and were these "pullers"
> standard
> > in 79?
> > Monte
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