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Re: [T3] Mystery wire


Well we had some luck, it's amazing how much better the engine ran when the
timing was set correct!!!!!!!! I did find an additional problem. The
centrifugal advance was slow returning to the idle position. So I pulled the
distributor out to take a look at the fly weights. After some carb cleaner
and a closer look I think I found the problem.  The two springs are not the
same size! The bigger spring was too long and a significantly larger gage
wire than the other spring.  All of the distributor's I have ever taken a
part had two springs the same size. Any ideas? Is this correct or another
quick fix by the previous owner? The distributor NR is 311 905205 AF, bosch
0231172 011.
----- Original Message -----
From: "Shirley, James J CDR (CNSP N4341)" <Shirley.James@cnsp.navy.mil>
To: "'Jim Adney'" <jadney@vwtype3.org>; <type3@vwtype3.org>
Sent: Thursday, August 02, 2001 8:33 AM
Subject: RE: [T3] Mystery wire


> Thanks for the info, I'll give it a try tonight and let ya know what how
> things go.
> Jim S.
>
> -----Original Message-----
> From: Jim Adney [mailto:jadney@vwtype3.org]
> Sent: Wednesday, August 01, 2001 12:39 PM
> To: type3@vwtype3.org
> Subject: Re: [T3] Mystery wire
>
>
> On 31 Jul 2001, at 9:58, Shirleyclan wrote:
>
> > the
> > timing was set using the Bentley manual. The picture in the Bentley
> > isn't really clear but the timing calls for 5 BTDC (engine code X).
> > Looking at the pulley at TDC is the first line, then small space, next
> > line (5 BTDC), then small space and two lines next to each other.  The
> > Elfrink book shows a pulley with marks that are close.
>
> This sounds like you need to advance your timing about 5 deg.
>
> The timing marks for 72-3 look like this: |   |   | |. They mark -5, 0,
> 5, 7.5 deg, so you need to be timed to the third mark from the left
> with the retard hose off, idle adjusted down. Then attach the retard
> hose and readjust the idle. You can then verify that the retard has
> pulled the timing back toward the -5 mark (first mark on the left.)
> The Elfrink book probably shows the earlier 68-71 marks which
> look like: | | |    | .
>
> This will improve your low end.
>
> > The fuel pressure is set at 28 psi, I've been told I should raise
> > it to about 35 psi, haven't done that yet. Maybe I can get to it
> > this weekend. I am fairly sure the mechanical advance is working
> > because when my vacuum advance can went bad, I could feel the
> > mechanical advance kick in. Above idle it runs like a champ!
>
> Don't increase the pressure above 30. That will just pollute. If you
> have a timing light you can see the timing advance when you up
> the rpms.
>
> You won't get the vacuum advance to do anything in the driveway,
> it only comes into play while cruising. It does nothing while
> accelerating either. I know that this is counterintuitive, because we
> all know that there are other dists where the vacuum advance does
> everything. The vacuum advance that is part of the dists which also
> have mechanical advance use the vacuum advance in an entirely
> different way. These dists, including all the FI dists, use the
> vacuum advance ONLY to supplement the mechanical advance
> under conditions of partial throttle and light load. This is done by
> controlling where the vacuum pickup is drilled. So we get NO
> vacuum at idle, and none at medium or full throttle.
>
> -
> Jim Adney
> jadney@vwtype3.org
> Madison, WI 53711-3054
> USA
>
> -------------------------------------------------------------------
> Too much? Digest! mailto:type3-d-request@vwtype3.org Subj=subscribe
>


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