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<DIV>For a period of time in the 70’s California required I believe it was...
‘55-‘65 cars to install a NOX system. It consisted of a radiator hose sized
copper tube about 3” long, it had a heat sensitive vacuum port (in/out) and two
hose clamps. The hose was cut near the radiator and the device inserted. The
vacuum source was run to this device and then back to the vacuum advance. It was
suppose to reduce NOX by stopping the vacuum advance until the car was warmed
up. Most people just bypassed it after passing the test. There was an even
simpler means that consisted of two port caps and a sticker that stated the
vacuum advance was disabled – completely. I believe the sticker even discouraged
long, heavy throttle usage. I know some of the Ford 6 cylinder cars had no
mechanical advance at all, - only vacuum. Disable that and you got nothing! EFI
and computer controlled ignition sure is nice to have these days.</DIV>
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<DIV>BTW, at least in California one way to tell a ‘65 from a ‘66 Mustang is to
look under the hood. 1966 was the year the state ramped up the smog stuff
big time.</DIV>
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<DIV style="font-color: black"><B>From:</B> <A title=coolvt@aol.com
href="mailto:coolvt@aol.com">coolvt@aol.com</A> </DIV>
<DIV><B>Sent:</B> Monday, November 06, 2017 6:22 AM</DIV>
<DIV><B>To:</B> <A title=srwick@hotmail.com
href="mailto:srwick@hotmail.com">srwick@hotmail.com</A> ; <A
title=garywinblad@comcast.net
href="mailto:garywinblad@comcast.net">garywinblad@comcast.net</A> ; <A
title=atwittsend@verizon.net
href="mailto:atwittsend@verizon.net">atwittsend@verizon.net</A> ; <A
title=tigers@autox.team.net
href="mailto:tigers@autox.team.net">tigers@autox.team.net</A> </DIV>
<DIV><B>Subject:</B> Re: Re: [Tigers] Timing</DIV></DIV></DIV>
<DIV> </DIV></DIV>
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<DIV><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: arial, helvetica, sans-serif; COLOR: #000000; BACKGROUND-COLOR: #ffffff">I
remember buying a 1972 Chevy. For pollution purposes the vacuum advance
line was blocked off by a solenoid . It was a 3 speed manual and the solenoid
would only open and allow vac. advance in 3rd gear. Of course it was
simple to by-pass:-)</SPAN></DIV>
<DIV><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: arial, helvetica, sans-serif; COLOR: #000000; BACKGROUND-COLOR: #ffffff"><BR></SPAN></DIV></DIV>In
a message dated 11/6/2017 2:05:29 AM Eastern Standard Time,
tigers@autox.team.net writes:
<DIV> </DIV>
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<P>Well I did say I was probably wrong.</P>
<P> </P>
<P>Steve</P><BR><BR>
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<DIV id=divRplyFwdMsg dir=ltr><SPAN
style="FONT-SIZE: 11pt; FONT-FAMILY: calibri, sans-serif; COLOR: #000000"><STRONG>From:</STRONG>
Gary Winblad <<A
href="mailto:garywinblad@comcast.net">garywinblad@comcast.net</A>><BR><STRONG>Sent:</STRONG>
Sunday, November 5, 2017 11:13 AM<BR><STRONG>To:</STRONG> steve wick; Tom
Witt; <A
href="mailto:tigers@autox.team.net">tigers@autox.team.net</A><BR><STRONG>Subject:</STRONG>
Re: [Tigers] Timing</SPAN>
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<DIV class=PlainText>Nooo.. cars had vacuum advance way before anyone gave a
rat's a$$ about <BR>emissions...<BR>Emissions brought on the vacuum retard...
two hoses to opposite sides of <BR>the diaphram.<BR>Gary<BR><BR><BR>On
11/4/2017 10:28 PM, steve wick via Tigers wrote:<BR>><BR>><BR>> I'm
probably wrong, but I think vacuum advance was for emissions, not <BR>> gas
mileage.<BR>><BR>> Steve<BR>><BR>>
------------------------------------------------------------------------<BR>>
*From:* Tigers <tigers-<A
href="mailto:bounces@autox.team.net">bounces@autox.team.net</A>> on behalf
of Tom Witt <BR>> via Tigers <<A
href="mailto:tigers@autox.team.net">tigers@autox.team.net</A>><BR>>
*Sent:* Saturday, November 4, 2017 5:51 PM<BR>> *To:* <A
href="mailto:tigers@autox.team.net">tigers@autox.team.net</A><BR>>
*Subject:* Re: [Tigers] Timing<BR>> Thanks for the pictures Ron. The second
type seems to use not only the<BR>> springs, but the cam action on the
weights edge as a means of plotting <BR>> the<BR>> advance curve.
The math for the RPM, spring tension, weight... - AND cam<BR>> action
baffles my brain. Somewhere I have a Mallory dual point (no <BR>>
vacuum<BR>> advance) distributor. Got it in a pile of "free" stuff at a
Mopar <BR>> swapmeet<BR>> (No step child parts for him!). I'll
have to check it's advance <BR>> system out<BR>> some
time.<BR>><BR>> Oddly I had a Volvo 544 that got 36 MPG on the highway
and it only had a<BR>> mechanical advance (no vacuum). Seems to defy the
necessity of vacuum<BR>> advance with mileage like that.<BR>><BR>>
-----Original Message-----<BR>> From: Ron Fraser via Tigers<BR>> Sent:
Saturday, November 04, 2017 12:16 PM<BR>> To: 'Gary Winblad' ; <A
href="mailto:tigers@autox.team.net">tigers@autox.team.net</A><BR>> Subject:
Re: [Tigers] Timing<BR>><BR>> Picture 1 is the early style Ford
distributor with oil port, ID# C2OF-J -<BR>> note there is 1 slot size for
each weight - this is the area that I have<BR>> seen wear
problems<BR>><BR>> Picture 2 is the later style Ford distributor, ID#
C8AF-E - note the <BR>> 13L &<BR>> 18L slots - the 13L slot is being
used in this example<BR>><BR>> Just wanted to show the differences in
these 2 mechanical advance systems<BR>><BR>> Ron Fraser<BR>><BR>>
-----Original Message-----<BR>> From: Tigers [<A
href="mailto:tigers-bounces@autox.team.net" rel="noopener noreferrer"
target=_blank>mailto:tigers-bounces@autox.team.net</A>] On Behalf Of
Gary<BR>> Winblad via Tigers<BR>> Sent: Friday, November 03, 2017 10:58
AM<BR>> To: Smit, Theo <<A
href="mailto:Theo.Smit@garmin.com">Theo.Smit@garmin.com</A>>; Tom Witt
<<A
href="mailto:atwittsend@verizon.net">atwittsend@verizon.net</A>>;<BR>>
<A href="mailto:tigers@Autox.Team.Net">tigers@Autox.Team.Net</A><BR>>
Subject: Re: [Tigers] Timing<BR>><BR>> The Tiger distributor I bought
from Sunbeam Specialties(was years ago) <BR>> was<BR>> the kind with the
two position advance limit. I just had to turn it <BR>> to
the<BR>> more limited stop, put in lighter speed shop springs and then
limit the<BR>> vacuum advance. All on my stock 260, works great, still on
regular gas.<BR>>
Gary<BR></DIV></DIV></DIV></DIV></DIV></BLOCKQUOTE></DIV></DIV></DIV></DIV></DIV><div id="DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2"><br />
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