Date: Sat, 20 Nov 1999 06:51:08 -0500
Reply-To: Bulley <gmbulley@BULLEY-HEWLETT.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Bulley <gmbulley@BULLEY-HEWLETT.COM>
Subject: Re: AC Compressor
Why is an AC on an air cooled motor a bad idea?
It comes down to one thing: the "margin of error" in cooling the air-cooled
motor is far tighter than a liquid cooled motor. By putting an AC
compressor on the list of things the motor has to spin with its meager 68
hp, you snatch about 6 hp, and push the temperature of the motor through
the roof. Think of it this way...if you are fat and out of shape, you are
probably just fine doing your daily chores, but if I put an 80 lb pack on
your back, you might have a heart attack just puttering around the house.
The air cooled motor is a little "out of shape" in the cooling department.
You can *help* the situation by using a Melling 150% oil pump that has been
blueprinted, and running your oil through a couple big oil coolers. The
problem with this solution is that while it can help dissipate some of the
heat from the motor, where the problems generally crop up in an air cooled
motor are not in the lower-end (bearings, rods, etc.) but in the
heads/pistons. There are only limited means toward providing extra cooling
for these, so an AC on an Air-cooled motor (generally) is a poor idea.
G. Matthew Bulley
Director
Bulley-Hewlett & Associates
www.bulley-hewlett.com
Cary, NC USA
888.468.4880 tollfree
-----Original Message-----
From: Michael S. Nichols [SMTP:msnichols@MINDSPRING.COM]
Sent: Friday, November 19, 1999 9:02 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: AC Compressor
Hello from Atlanta. Or shall I say Hotlanta. At the risk of sounding
rude, I want to know--WHO said "an air cooled should not have AC anyway"???
Have we ever driven to Miami or Atlanta in August? Help me with this...
Regards, Michael Nichols '81 Weekender
At 06:41 PM 11/19/99 -0500, you wrote:
>An air cooled Vanagon should not have AC anyway. Particularly in a warm
>climate. The Sanden will not work as the body is tool long. The YORK is
the
>only reasonable alternative.
>
>Dennis
>
>----- Original Message -----
>From: Bob Donalds <bostneng@FCL-US.NET>
>To: <vanagon@GERRY.VANAGON.COM>
>Sent: Friday, November 19, 1999 2:39 PM
>Subject: Re: AC Compressor
>
>
>> Bulley wrote:
>> >
>> > Ron-
>> >
>> > Prima Fascia, it sounds like a great idea. If your York is toast, the
>> > Sanden is a good compressor (rotary, rather than piston). But you
voiced
>> > the snag...make ABSOLUTELY sure you can deal with the tin issue. I
have
>the
>> > feeling, that will prove to be a headache, unless you have a buddy who
>is
>> > good with forming/welding thin sheet metal.
>> >
>> > And don't fall prey to the shadetree-VW mechanic's view...aaawww, that
>> > piece of tin ain't that important...every piece, every shape, every
hole
>> > where hot air exits, every seal that prevents the mix of hot air and
>cool
>> > air is VERY important. But you knew that.
>> >
>> > Cheers,
>> >
>> > G. Matthew Bulley
>> > Director
>> > Bulley-Hewlett & Associates
>> > www.bulley-hewlett.com
>> > Cary, NC USA
>> > 888.468.4880 tollfree
>> >
>> > -----Original Message-----
>> > From: Ron Hill [SMTP:rhill@MYLINK.NET]
>> > Sent: Friday, November 19, 1999 2:55 PM
>> > To: vanagon@GERRY.VANAGON.COM
>> > Subject: AC Compressor
>> >
>> > Volks,
>> >
>> > The AVP rebuild is almost ready to go back into the 81 Westy......I
>can't
>> > wait to get that baby back on the road.
>> >
>> > But, there is one last problem. The AC compressor clutch is bad. I
>took
>> > the compressor to a large local AC parts and service shop to have the
>> > clutch replaced but was told that I would be much better off to
replace
>the
>> > old York compressor with a modern Sanding (not sure about the
spelling)
>> > compressor. This compressor supposedly consumes less power from the
>engine
>> > but is more efficent. They have an adapter bracket that looks like it
>> > might fit. The hose end connections are different but the shop
offered
>> > several options for solving this.
>> >
>> > I wonder if this will work and if the tin will fit back onto the
engine
>> > with this setup.
>> >
>> > Does anyone have experience with this type conversion.
>> >
>> > As always any and all comments are welcomed and appreciated.
>> >
>> > Ron Hill
>> > Macon GA
>> > 81 Westy Roxy
>>
>> I second that
>> I do not warrenty air cooled engines that have an AC unit installed
>> Bob
>> www.bostonengine.com
>
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