This is a multi-part message in MIME format.
--===============5348480008633970740==
boundary="------------4A67A24E02266B9A9BC8A4F5"
Content-Language: en-US
This is a multi-part message in MIME format.
--------------4A67A24E02266B9A9BC8A4F5
Content-Transfer-Encoding: 8bit
Until a couple years ago I was putting 6-8K miles on my BJ8 every year,
so I probably had more chances for failures than most.
bs
On 5/10/2021 12:47 PM, Michael Oritt wrote:
> I have a double-header on my 100 that Dave converted to solid state
> and rebuilt for me--it has performed faultlessly for probably ten
> years it is indeed interesting that several knowledgeable people have
> such differing experiences with SU solid state pumps, or for that
> matter other pieces of equipment, and it is hard to charge off either
> consistent success or repeated failures to luck of the draw. In the
> same vein, notwithstanding the popularity of FACET cubes I have had
> very little luck with them and on my Weber-carbed race cars I use
> Carter 4070's which have performed perfectly.
>
> Best--Michael Oritt
>
> On Mon, May 10, 2021 at 1:22 PM Bob Spidell <bspidell@comcast.net
>
> The late Dave DuBois pursued the same retirement pastime on this
> side of
> The Pond. He designed a retrofit using the points to switch a power
> transistor, with the expectation that relieving the points of most of
> the current-passing duties would extend their life; he found that
> doing
> so caused the points to wear faster, as the current was
> insufficient to
> clean the points surfaces. He later designed a solid-state solution
> using an optical switch; I had him convert a couple pumps for me and
> although the conversion was very professional--and he bench tested
> them
> for 24hrs continuous--I had mixed success with them. My results with
> SU's SS pumps, either conversions or off-the-shelf has been
> inconsistent
> as well. I think Facet avoids this problem by having their pumps run
> more-or-less continuously. I tried transils and didn't get the
> expected
> result; I guess me and SU pumps just don't get along, but like some
> girlfriends I've had I stick with them anyway.
>
> Dave also noted, as did I, that the points available at the time were
> pure crap. They came in unmarked white boxes and appeared to be
> made out
> of (shiny) silver--go figure--whereas tungsten is a dull metallic
> color.
> Maybe the situation has improved in the last few years, but I haven't
> bought any for a while.
>
> Bob
>
> ps. If the pump is fitted with a capacitor, and the capacitor has '+'
> and '-' marks it will be polarity-sensitive (hence the marks).
>
--------------4A67A24E02266B9A9BC8A4F5
Content-Transfer-Encoding: 8bit
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
</head>
<body>
Until a couple years ago I was putting 6-8K miles on my BJ8 every
year, so I probably had more chances for failures than most.<br>
bs<br>
<br>
<br>
<div class="moz-cite-prefix">On 5/10/2021 12:47 PM, Michael Oritt
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAPTa0B7AhkaOXi3RLce5RF1_E2bYow8H7W8md+D48MB==DviDA@mail.gmail.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<div dir="ltr">
<div class="gmail_default" style="color:#3333ff">I have a
double-header on my 100 that Dave converted to solid state and
rebuilt for me--it has performed faultlessly for probably ten
years it is indeed interesting that several knowledgeable
people have such differing experiences with SU solid state
pumps, or for that matter other pieces of equipment, and it is
hard to charge off either consistent success or repeated
failures to luck of the draw. In the same vein,
notwithstanding the popularity of FACET cubes I have had very
little luck with them and on my Weber-carbed race cars I use
Carter 4070's which have performed perfectly.</div>
<div class="gmail_default" style="color:#3333ff"><br>
</div>
<div class="gmail_default" style="color:#3333ff">Best--Michael
Oritt</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Mon, May 10, 2021 at 1:22
PM Bob Spidell <<a href="mailto:bspidell@comcast.net";
moz-do-not-send="true">bspidell@comcast.net</a>> wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">The
late Dave DuBois pursued the same retirement pastime on this
side of <br>
The Pond. He designed a retrofit using the points to switch a
power <br>
transistor, with the expectation that relieving the points of
most of <br>
the current-passing duties would extend their life; he found
that doing <br>
so caused the points to wear faster, as the current was
insufficient to <br>
clean the points surfaces. He later designed a solid-state
solution <br>
using an optical switch; I had him convert a couple pumps for
me and <br>
although the conversion was very professional--and he bench
tested them <br>
for 24hrs continuous--I had mixed success with them. My
results with <br>
SU's SS pumps, either conversions or off-the-shelf has been
inconsistent <br>
as well. I think Facet avoids this problem by having their
pumps run <br>
more-or-less continuously. I tried transils and didn't get the
expected <br>
result; I guess me and SU pumps just don't get along, but like
some <br>
girlfriends I've had I stick with them anyway.<br>
<br>
Dave also noted, as did I, that the points available at the
time were <br>
pure crap. They came in unmarked white boxes and appeared to
be made out <br>
of (shiny) silver--go figure--whereas tungsten is a dull
metallic color. <br>
Maybe the situation has improved in the last few years, but I
haven't <br>
bought any for a while.<br>
<br>
Bob<br>
<br>
ps. If the pump is fitted with a capacitor, and the capacitor
has '+' <br>
and '-' marks it will be polarity-sensitive (hence the marks).<br>
<br>
</blockquote>
</div>
</blockquote>
<br>
</body>
</html>
--------------4A67A24E02266B9A9BC8A4F5--
--===============5348480008633970740==
Content-Transfer-Encoding: 7bit
Content-Disposition: inline
_______________________________________________
Archive: http://www.team.net/pipermail/healeys http://autox.team.net/archive
Healeys@autox.team.net
http://autox.team.net/mailman/listinfo/healeys
--===============5348480008633970740==--
|