This is kinda tough to explain, but I'll try. I have a 40DCOE Weber, and I
used a very small drill bit to make a hole just to the aircleaner side of
the throttle plate. I then used liquid solder to glue a vacuum nipple into
the hole. It is positioned so that there is 0 vacuum at idle, and more as
the throttle is opened. I a vacuum line up to this and watched on a vacuum
gauge to make sure it was correct. Seems to work great. Maximum vacuum at
cruising with no load, vacuum drops under heavy accelleration.
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drill hole and attatch vacuum line here.
Hope this drawing makes it through e-mail
David Riker
74 Midget
63 Falcon
----- Original Message -----
From: Bryan Vandiver <Bryan.Vandiver@Eng.Sun.COM>
To: <Bryan.Vandiver@Eng.Sun.COM>; <dwramsey@worldnet.att.net>
Cc: <spridgets@autox.team.net>
Sent: Monday, August 02, 1999 12:59 PM
Subject: Re: Timing the 1275 ?
,
> Does anyone out there have any info on modifying a side-draft, for vacuum
> advance?? It seems like a a properly placed hole drilled through the carb
body
> would do the trick, but I don't want to do that unless I'm really sure
about
> what to do.
> At this point I'm not really in the mood to spend a lot of $$ to buy a new
> mechanical advance distributor. I've poured a lot of time and $$ into this
> project so far, and it's getting harder for me to justify spending even
more $$
> at this point.
>
> Regards - Bryan
>
> >X-Unix-From: dwramsey@worldnet.att.net Fri Jul 30 21:31:02 1999
> >X-MSMail-Priority: Normal
> >X-Priority: 3
> >To: "Bryan Vandiver" <Bryan.Vandiver@eng.sun.com>
> >Cc: spridgets@autox.team.net
> >MIME-Version: 1.0
> >Subject: Re: Timing the 1275 ?
> >X-MIME-Autoconverted: from quoted-printable to 8bit by
triumph.cs.utah.edu id
> WAA14964
> >
> >Bryan, If you used an "offset cam key" the timing mark on the "crank"
doesn't
> change. TDC is TDC for the piston not the cam and the piston is connected
to
> the crank not the cam. The key is to install the timing cover and crank
pulley
> while your dial indicator is still on #1 piston so you can mark TDC. Then
if
> you don't have and advance timing light you can also make marks at 10 and
37
> deg, I use different colors for each mark. Total advance should occur at
4K rpm
> and should be between 36 and 38 deg according to Vizard (as I recall the
book
> calls for 34 deg stock). Then you can "speed time" it at 4k and then
check the
> timing with a static light so you can R&R the distributor fast if you need
to
> later. If you don't have either a advance or regular dynamic light have
someone
> else speed time it and then go home and static time it and make your two
marks
> on top where you can see them, you can then repeat the setting whenever
you
> disturb the distributor. Did I mention that t!
> >!
> >!
> >he points dwell affects the timing but the timing doesn't affect the
dwell.
> Thats another story, always check the dwell before the timing.
> > Crash
> >
>
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