From: "Marvin Kaye" <marv@lancaironline.net>
Subject: Re: [FlyRotary] Re: electric vacuum pump - a way unscientific
  science experiment
To: flyrotary
Date: Tue, 03 Jun 2003 08:55:30 -0400
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Posted for Mark Steitle <msteitle@mail.utexas.edu>:

Matt/John,
Here's my 2 cents worth on the subject.  Take it for what its worth.

I had considered going this route, but there seems to be an inherit mismatch 
between the two.  The alternator needs to be spun fast to generate rated 
amperage, and the vacuum pump has a fairly conservative rpm limit to last a 
reasonable amount of time.  With the two coupled together I didn't see how to 
resolve that issue, so I discarded the idea and decided to go all electric. 
  One possibility though is to use the Mazda smog pump for vacuum.  Its heavy, 
but very reliable, and cheap.  Another possibility is to use the 
Izusu/Chevette vacuum pump (bolts to the rear of the Izusu/Chevette 
alternator).  Its available through Izusu dealers for about $150.  It weighs 
about 2-3 lbs.

Mark S.

>> For what its worth, I am using a early 80's diesel Chevy Chevette
>> Alternator, with the vacuum pump attached to the rear.