[T3] 73 auto trans type 3 ARR ?

Sun Jun 11 22:43:17 PDT 2023

When I rebuilt this engine the stock dished pistons were NLA had to use
flat top and that increased the CR a bit. I don't really care if the vacuum
advance is in play , I'm fine without it . I did feel a bit more pep on
light throttle. All I can do is as I have and set the base timing @ 3
degrees BTDC and in doing so it does pull better. Every engine will be a
bit different, can't always go by the specs even with 89. These heads are
also stepped.

On Sun, Jun 11, 2023 at 6:37 PM Keith Park <topnotch at nycap.rr.com> wrote:

> If it pings with stock timing and cam, your CR is too high.
> I was never able to run less than 89 on my stock engine, and that was with
> stepped heads.
> The vacuum can is there to advance timing under light load for better gas
> mileage, under heavy loads
> Where it pings, the can has no effect.
>
> Keith
>
> Topnotch Restorations
> topnotch at nycap.rr.com
> http://www.topnotchresto.com
> 71 Squareback  “Hothe”
> 65 Notchback  “El Baja Rojo”
> 93 RX7  “Redstur”
> 13 Subaru Outback "Blendin"
>
> -----Original Message-----
> From: type3-vwtype3.org <type3-vwtype3.org-bounces at lists.vwtype3.org> On
> Behalf Of William Jahn
> Sent: Sunday, June 11, 2023 9:24 PM
> To: type3 at vwtype3.org
> Subject: Re: [T3] 73 auto trans type 3 ARR ?
>
> I did all of that. Besides right now I don't have the vacuum line on the
> can , when I did, it pinged , I never figured out why. I used to connect it
> before the gas became so bad here. Now I would need to retard the base
> timing ,then it becomes a trade off.
>
> On Sun, Jun 11, 2023 at 5:28 PM Keith Park <topnotch at nycap.rr.com> wrote:
>
> > Sometimes the ball bearing in the distributor wears a spot on the
> > plate and stick here, you need to smooth that out and Lube it.
> >
> > Keith
> >
> >
> > Topnotch Restorations
> > topnotch at nycap.rr.com
> > http://www.topnotchresto.com
> > 71 Squareback  “Hothe”
> > 65 Notchback  “El Baja Rojo”
> > 93 RX7  “Redstur”
> > 13 Subaru Outback "Blendin"
> >
> > -----Original Message-----
> > From: type3-vwtype3.org <type3-vwtype3.org-bounces at lists.vwtype3.org>
> > On Behalf Of William Jahn
> > Sent: Sunday, June 11, 2023 8:00 PM
> > To: type3 at vwtype3.org
> > Subject: Re: [T3] 73 auto trans type 3 ARR ?
> >
> > Checking with a timing light shows me at idle when this happens the
> > timing is advanced then drops back to the 5 degree BTDC then once I
> > increase the RPM it will advance to much at idle or hang . It's not
> > consistent, it's not over advancing but it's not returning to 5
> > degrees DBTC so it's causing the idle to be high most of the time. I
> > do know the timing is set at 3 degrees BTDC because when it does not
> > hang I see this reading when it works and it's consistent . That is
> > where I set it because 5 BTDC causes a slight ping with the fuel we
> > have here. Doing this did not cause the loss of any power , in fact it
> pulled better.
> >
> > On Sun, Jun 11, 2023 at 4:50 PM William Jahn <willjahn975 at gmail.com>
> > wrote:
> >
> > > I looked at all the vacuum lines and could not find one loose or bad.
> > > I do know if the trans modulator leaks you lose trans fluid and if
> > > the line is off the trans will slam into gear. I know this because
> > > once adjusting it on the road I forgot to connect it, The plastic
> > > Tee is fine and everything else. No leaking gaskets besides I
> > > replaced them all. I did order the two caps for the breather box
> > > since mine are old
> > and hard .
> > >
> > >  I checked the dist and the rotor snaps back as it should. But that
> > > does not mean while it's running a weight is not sticking. I have
> > > the
> > > 73 AG for a 73 manual trans I rebuilt so I will put that in and see
> > > if the AH has some issue. Of all the work I did the dist has been in
> > > there the longest and besides it could use the trigger point cam lubed
> .
> > >
> > >  That seems to be the most likely problem as far as I can tell.
> > >
> > >
> > >
> > > On Sat, Jun 10, 2023 at 11:23 PM <jadney at vwtype3.org> wrote:
> > >
> > >> On 10 Jun 2023 at 16:46, William Jahn wrote:
> > >>
> > >> >  I got new Intake gaskets from you Jim. I did this work at the
> > >> > end of
> > >> 2019
> > >> > . I cleaned everything and even sealed the IAD back cover gasket
> > >> > using silicone on both sides. Let it set up the 4 bolts loose
> > >> > then when dry tightened them. I replaced every vacuum hose  and
> > >> > the injector seals and all the fuel line . I made certain the IAD
> > >> > lined up perfectly with the runners , and had to bend 2 slightly.
> > >>
> > >> Okay, sounds like you've got all those things covered.
> > >>
> > >> Have you checked the tightness of the two screws for the cold start
> > valve?
> > >>
> > >> How about the hoses for the AT vacuum modulator?
> > >>
> > >> Does your engine still have the EGR valve and plumbing? If so, have
> > >> you blocked it off?
> > >> Checked the short hose that connects the 2-piece pipe to the IAD?
> > >> (I made a blockoff plate for the flange to the EGR valve inlet and
> > >> sealed it with one of those tiny VW metal manifold warmup gaskets.
> > >> The heat exchanger also got a blockoff plate and gasket.
> > >> My EGR filter fell
> > >> apart and has been completely removed.)
> > >>
> > >> You could try flushing out the idle air channel with something like
> > >> WD-40. And check the
> > >> '72-3 crankcase breather that vents into the IAD cover; could there
> > >> be something intermittent there? (Flush the breather port in the
> > >> cover and the PCV valve in the breather box with
> > >> WD-40 to make sure they're not clogged with gooey oil.)
> > >>
> > >> Keith's suggestion of looking for a leak with an unlit propane
> > >> torch is always something to consider, but I've always found this
> > >> to be hard to interpret. Maybe I've just never come across a large
> > >> enough leak.
> > >>
> > >> If all those seem okay, yeah, maybe there's a problem with the
> > >> distributor. You should be able to see if the timing always comes
> > >> back to the same point at idle with a timing light, but, again,
> > >> that's hard to interpret, since the timing SHOULD change between
> > >> 800 and 1400
> > >> RPM. Maybe you can just watch how it moves as you move the throttle
> > >> and RPMs up and down.
> > >>
> > >> --
> > >> *******************************
> > >> Jim Adney, jadney at vwtype3.org
> > >> Madison, Wisconsin, USA
> > >> *******************************
> > >>
> > >> _______________________________________________
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