The later MGB heaters have a big wire-wound resistor pop riveted to a tab
inside the heater case. There are three wires going into the case, and the
low speed wire goes to the resistor. The rocker switch has three positions:
off, low, high.
All of these wires are undersized, and you should be able to get more
airflow by rewiring these circuits with heavier wire and/or a relay.
The MG Owner's Club sells an uprated fan motor, a higher-efficiency impeller
and a high volume heater core that will really scorch your toes.
Scott Pontius
'78 MGB V8
San Diego
----- Original Message -----
From: Larry Hoy <larryhoy@prodigy.net>
To: Barney Gaylord <barneymg@ntsource.com>; MG list <mgs@autox.team.net>
Sent: Friday, December 22, 2000 10:57 PM
Subject: RE: MGB heater motors
> Barney, I think you're right. I would like a bit more air flow. I would
like to think I could have the slow speed be about what it
> is now and another higher speed that is greater than the present speed.
>
> larry Hoy
>
> >-----Original Message-----
> >From: owner-mgs@autox.team.net [mailto:owner-mgs@autox.team.net]On
> >Behalf Of Barney Gaylord
> >Sent: Friday, December 22, 2000 11:32 PM
> >To: Larry Hoy
> >Cc: mgs@autox.team.net
> >Subject: Re: MGB heater motors
> >
> >
> >At 09:20 PM 12/22/2000 -0700, Larry Hoy wrote:
> >>Were any MGBs equipped with a 2 speed heater blower motor?
> >
> >Yes. But I thought the two speed arrangement was still a single speed
> >motor, and the slower speed was achieved by switching a resistor in
series
> >with it to drop the input voltage. Time to educate the MGA guy a little.
> >Did any of the later motors have more than two wires?
> >
> >Barney Gaylord
> >1958 MGA with an attitude
> > http://www.ntsource.com/~barneymg
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