"California" Bocar 34Pict3 vacuum connections
 

I have this new bocar 34pict3 california version carb. It is the one with
the throttle positioner. It has some vacuum hose fittings different than the
normal 34Pict3. One is at the very back middle. One is at the back near the
bottom. This one is already connected to the throttle positioner. There is
one on the left side at the bottom of the bowl. There is one on the right
near the top of the bowl. On normal 34Pict3s there is a fitting on the left
in the middle. The cali version doesn't have this fitting. Looks like it has
a place that you could drill out and put one there but it doesn't come with
one.

Anyway, I have a electronic ignition distributor (no vacuum canister). So my
question is what the heck do I do with the 3 vacuum connections on the carb?
And since there are 3, what do they normally hook to?

Gary

Plug the other ones if you have s stripped down system. One is intake
manifold vacuum, one is distributor advance that will pull in (vacuum
can on distributor) when you open the throttle. The other one is
probabally for recycling emission to help keep that California air
sparkly clean. I have a non-Cal version with both of mine capped off.
You also have a smaller main jet which puts less fuel in the mixture
which will run hotter and help burn more pollutiants. I do have a VW
manual that might have exact configuration if your system requires
that. Let me know if you need it, other wise cap it off would be my
quess.

SW

Actually, the cali version I have has very different hose connections than
you are talking about. I have the same one on the front but I don't have
the one on the side for the advance. Instead I have two other ones and they
come out where the 2 jets are (one on each side of the bowl). Before I plug
them up I would like to know what they are for and how they were intended to
be used.

Thanks,
Gary

"69' Dune Buggy 1600cc" > wrote in message
ups.com...
> Plug the other ones if you have s stripped down system. One is intake
> manifold vacuum, one is distributor advance that will pull in (vacuum
> can on distributor) when you open the throttle. The other one is
> probabally for recycling emission to help keep that California air
> sparkly clean. I have a non-Cal version with both of mine capped off.
> You also have a smaller main jet which puts less fuel in the mixture
> which will run hotter and help burn more pollutiants. I do have a VW
> manual that might have exact configuration if your system requires
> that. Let me know if you need it, other wise cap it off would be my
> quess.
>
> SW
>

Gary,

I just looked this up in the VW manual. Naturally they have pictures
of the NORMAL carbs 30pict, 34pict but nothing like you mentioned.
HOWEVER, they do talk about the EGR value(Exhaust Gas Recirculation)
and testing proceedures. That devices is hooked to the carb to pull in
and REBURN emissions. Also, an autostick tranny requires two vacuum
connects, one manifold to supply the muscle to power the clutch, and
the other (carb connection) to help assist disengaging the clutch. I
have an autostick, but lack a seperate port so it's tee'd into the
advance line...
OK, so all this said the two ports on the side of your carb will
control the distributor advance, and EGR emmission along with any
control for the autostick. Those ports if not used should be plugged.
You can plug them, start your engine and manually open the throttle a
bit and then remove the cap and feel the suction, the advance will kick
in once you open the throttle so you should be able to pick out which
one of two is TRUELY advance. The other one could have suction all the
time, I'm not sure on how the EGR circuit is plumbed. Hope this helps,
the book really doesn't go into detail on your specific question.

Scott

Thanks. I appreciate you looking into it.
Gary

"69' Dune Buggy 1600cc" > wrote in message
oups.com...
> Gary,
>
> I just looked this up in the VW manual. Naturally they have pictures
> of the NORMAL carbs 30pict, 34pict but nothing like you mentioned.
> HOWEVER, they do talk about the EGR value(Exhaust Gas Recirculation)
> and testing proceedures. That devices is hooked to the carb to pull in
> and REBURN emissions. Also, an autostick tranny requires two vacuum
> connects, one manifold to supply the muscle to power the clutch, and
> the other (carb connection) to help assist disengaging the clutch. I
> have an autostick, but lack a seperate port so it's tee'd into the
> advance line...
> OK, so all this said the two ports on the side of your carb will
> control the distributor advance, and EGR emmission along with any
> control for the autostick. Those ports if not used should be plugged.
> You can plug them, start your engine and manually open the throttle a
> bit and then remove the cap and feel the suction, the advance will kick
> in once you open the throttle so you should be able to pick out which
> one of two is TRUELY advance. The other one could have suction all the
> time, I'm not sure on how the EGR circuit is plumbed. Hope this helps,
> the book really doesn't go into detail on your specific question.
>
> Scott
>

I have a 1600cc dual port engine with the 34pict3 carb, and keep it as stock
as possible. One line runs from a port to the vaccum advance. One runs to
the temperature sensor in the stock breather then to the door to feed it
warm air when the engine is cold. My manual also mentions the EGR, but my
car does not have it. I've always assumed that was the one that is capped
off.

I'm in agreement with everyone else. Cap off any vaccum sources that are not
used. The one capped connection in mine appears to have been that way since
the factory. Probably due to options used on different cars so they could
use the same carb.

"GaryH" > wrote in message
om...
> Thanks. I appreciate you looking into it.
> Gary
>
> "69' Dune Buggy 1600cc" > wrote in message
> oups.com...
>> Gary,
>>
>> I just looked this up in the VW manual. Naturally they have pictures
>> of the NORMAL carbs 30pict, 34pict but nothing like you mentioned.
>> HOWEVER, they do talk about the EGR value(Exhaust Gas Recirculation)
>> and testing proceedures. That devices is hooked to the carb to pull in
>> and REBURN emissions. Also, an autostick tranny requires two vacuum
>> connects, one manifold to supply the muscle to power the clutch, and
>> the other (carb connection) to help assist disengaging the clutch. I
>> have an autostick, but lack a seperate port so it's tee'd into the
>> advance line...
>> OK, so all this said the two ports on the side of your carb will
>> control the distributor advance, and EGR emmission along with any
>> control for the autostick. Those ports if not used should be plugged.
>> You can plug them, start your engine and manually open the throttle a
>> bit and then remove the cap and feel the suction, the advance will kick
>> in once you open the throttle so you should be able to pick out which
>> one of two is TRUELY advance. The other one could have suction all the
>> time, I'm not sure on how the EGR circuit is plumbed. Hope this helps,
>> the book really doesn't go into detail on your specific question.
>>
>> Scott
>>
>
>

Basically, what you have a the Mexico version of the 34 pict, although not
quite. It should have the vacuum port on left for the distributor, but if
you don't need it then it won't matter (but you might wish you did have it,
later). The port at the rear, half way up, is for the thermostatic valve in
the air cleaner. The two others, bottom left and top right are for the
Mexican altitude corrector (due to Mexico City being so high up). I believe
that if you plug these two ports, the jet will act at their base setting for
sea-level.

"Ed B" > wrote in message
news:1100964154.5JA7nM+EDNsEyBi472fldA@teranews...
> I have a 1600cc dual port engine with the 34pict3 carb, and keep it as
stock
> as possible. One line runs from a port to the vaccum advance. One runs to
> the temperature sensor in the stock breather then to the door to feed it
> warm air when the engine is cold. My manual also mentions the EGR, but my
> car does not have it. I've always assumed that was the one that is capped
> off.
>
> I'm in agreement with everyone else. Cap off any vaccum sources that are
not
> used. The one capped connection in mine appears to have been that way
since
> the factory. Probably due to options used on different cars so they could
> use the same carb.
>
> "GaryH" > wrote in message
> om...
> > Thanks. I appreciate you looking into it.
> > Gary
> >
> > "69' Dune Buggy 1600cc" > wrote in message
> > oups.com...
> >> Gary,
> >>
> >> I just looked this up in the VW manual. Naturally they have pictures
> >> of the NORMAL carbs 30pict, 34pict but nothing like you mentioned.
> >> HOWEVER, they do talk about the EGR value(Exhaust Gas Recirculation)
> >> and testing proceedures. That devices is hooked to the carb to pull in
> >> and REBURN emissions. Also, an autostick tranny requires two vacuum
> >> connects, one manifold to supply the muscle to power the clutch, and
> >> the other (carb connection) to help assist disengaging the clutch. I
> >> have an autostick, but lack a seperate port so it's tee'd into the
> >> advance line...
> >> OK, so all this said the two ports on the side of your carb will
> >> control the distributor advance, and EGR emmission along with any
> >> control for the autostick. Those ports if not used should be plugged.
> >> You can plug them, start your engine and manually open the throttle a
> >> bit and then remove the cap and feel the suction, the advance will kick
> >> in once you open the throttle so you should be able to pick out which
> >> one of two is TRUELY advance. The other one could have suction all the
> >> time, I'm not sure on how the EGR circuit is plumbed. Hope this helps,
> >> the book really doesn't go into detail on your specific question.
> >>
> >> Scott
> >>
> >
> >
>
>

I think there is an alky versionnof that(Brazilian)carb.Never seen one,but?
"GaryH" > wrote in message
om...
> Thanks. I appreciate you looking into it.
> Gary
>
> "69' Dune Buggy 1600cc" > wrote in message
> oups.com...
>> Gary,
>>
>> I just looked this up in the VW manual. Naturally they have pictures
>> of the NORMAL carbs 30pict, 34pict but nothing like you mentioned.
>> HOWEVER, they do talk about the EGR value(Exhaust Gas Recirculation)
>> and testing proceedures. That devices is hooked to the carb to pull in
>> and REBURN emissions. Also, an autostick tranny requires two vacuum
>> connects, one manifold to supply the muscle to power the clutch, and
>> the other (carb connection) to help assist disengaging the clutch. I
>> have an autostick, but lack a seperate port so it's tee'd into the
>> advance line...
>> OK, so all this said the two ports on the side of your carb will
>> control the distributor advance, and EGR emmission along with any
>> control for the autostick. Those ports if not used should be plugged.
>> You can plug them, start your engine and manually open the throttle a
>> bit and then remove the cap and feel the suction, the advance will kick
>> in once you open the throttle so you should be able to pick out which
>> one of two is TRUELY advance. The other one could have suction all the
>> time, I'm not sure on how the EGR circuit is plumbed. Hope this helps,
>> the book really doesn't go into detail on your specific question.
>>
>> Scott
>>
>
>