Pict 34 carb.
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golfingtam
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- Joined: 22 Feb 2009, 10:42
- 80-90 Mem No: 6415
- Location: Annbank,Ayr,Scotland.
Pict 34 carb.
Can anyone tell me if the carb from a 1.9 dg water cooled will fit a 1600 air-cooled. I'm having trouble with mine when accelerating, it is very flat as if the pump jet etc are not working. Thanks.
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Robsey
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- Joined: 19 May 2012, 20:45
- 80-90 Mem No: 11137
- Location: East Manchester
Re: Pict 34 carb.
The DG carb - Pierburg 2e3 relies upon the coolant of the waterboxer to control the choke flap.
There were variants on 80s Vauxhalls to use a bi-metallic coiled strip to operate the choke spindles, but in my own experience they were not hugely reliable.
In fact on my Cavalier mk2 with 2e3 carb, I ended up fitting an Alexander manual choke cable conversion kit.
As for physical fit - you would need at least an adapter to fit the carb body to the manifold, or a DG manifold but with all water stubs plugged.
I am certain too that the ports on the cylinder heads are smaller on the pict carb engines and manifolds.
The DG manifold would probably fit, but the port holes are much bigger. Using the pict gasket should be okay, but some odd turbulence may occur where the port size suddenly changes - dg large to pict small.
Probably not enough to affect bhp though.
People often say - anything is possible with the right funds and motivation.
------------------------
If you have a flat spot, consider general service checks.
Ignition timing dependent upon running on E5 (super unleaded) or E10 (standard unleaded).
This can affect the responsivenes of the engine if sufficiently out from the correct setting.
How long is it since the plugs, leads, distributor cap and rotor arm were checked, cleaned and / or replaced.
Daft as is sounds - is the battery good too.
As for thegeneral electrics - make sure that all wiring and connectors for the coil and associated parts are in good overall condition, clean, dry, and securely fitted.
All these affect how good the spark is in the plugs.
---------------------------------
Fuel Supply:-
Try checking the fuel pump for delivery rate.
Pumps and their actuator rods can become worn or less effective with age.
Fuel tank, lines and filters -
again with age filters can become clogged - fuel tanks may corrode internally causing rust flakes to dis-lodge and get trapped further up the line...
Finally - the carb.
Not sure about the early Pict carbs, but I know the pierburgs had cone filters in their inlet stubs.
A good check and clean of the carb and jets....
and re-adjustment of the carb settings may improve things.
Dependent upon your practical skill level, you could get your existing carb cleaned and serviced.
-------------------------------------
Either way -
I would start with a good service, replacing anything that has not been "done" for a while.
In summary - it would be easier and probably cheaper to ensure that your current set-up is working at its best, rather than trying to fit a different carb.
There were variants on 80s Vauxhalls to use a bi-metallic coiled strip to operate the choke spindles, but in my own experience they were not hugely reliable.
In fact on my Cavalier mk2 with 2e3 carb, I ended up fitting an Alexander manual choke cable conversion kit.
As for physical fit - you would need at least an adapter to fit the carb body to the manifold, or a DG manifold but with all water stubs plugged.
I am certain too that the ports on the cylinder heads are smaller on the pict carb engines and manifolds.
The DG manifold would probably fit, but the port holes are much bigger. Using the pict gasket should be okay, but some odd turbulence may occur where the port size suddenly changes - dg large to pict small.
Probably not enough to affect bhp though.
People often say - anything is possible with the right funds and motivation.
------------------------
If you have a flat spot, consider general service checks.
Ignition timing dependent upon running on E5 (super unleaded) or E10 (standard unleaded).
This can affect the responsivenes of the engine if sufficiently out from the correct setting.
How long is it since the plugs, leads, distributor cap and rotor arm were checked, cleaned and / or replaced.
Daft as is sounds - is the battery good too.
As for thegeneral electrics - make sure that all wiring and connectors for the coil and associated parts are in good overall condition, clean, dry, and securely fitted.
All these affect how good the spark is in the plugs.
---------------------------------
Fuel Supply:-
Try checking the fuel pump for delivery rate.
Pumps and their actuator rods can become worn or less effective with age.
Fuel tank, lines and filters -
again with age filters can become clogged - fuel tanks may corrode internally causing rust flakes to dis-lodge and get trapped further up the line...
Finally - the carb.
Not sure about the early Pict carbs, but I know the pierburgs had cone filters in their inlet stubs.
A good check and clean of the carb and jets....
and re-adjustment of the carb settings may improve things.
Dependent upon your practical skill level, you could get your existing carb cleaned and serviced.
-------------------------------------
Either way -
I would start with a good service, replacing anything that has not been "done" for a while.
In summary - it would be easier and probably cheaper to ensure that your current set-up is working at its best, rather than trying to fit a different carb.
1983 Tin Top with a poorly DF and 4 speed DT box.
1987 Electrics and a DJ engine.
Maybe one day I might get it finished
1987 Electrics and a DJ engine.
Maybe one day I might get it finished
-
golfingtam
- Registered user
- Posts: 47
- Joined: 22 Feb 2009, 10:42
- 80-90 Mem No: 6415
- Location: Annbank,Ayr,Scotland.
Re: Pict 34 carb.
Thanks Robsey for your reply. I'll give it all a go. I don't think the pump diaphragm is working as I can't see fuel being sprayed into venturi. Thanks Tom.
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Robsey
- Registered user
- Posts: 1405
- Joined: 19 May 2012, 20:45
- 80-90 Mem No: 11137
- Location: East Manchester
Re: Pict 34 carb.
Maybe a refurb kit is needed.
https://brickwerks.co.uk/product/carb-r ... t3-1-9-df/
Not quite the exact air cooled carb quoted, but the later DF waterboxer version. -
I couldn't see any carb kits for the 1.6 air cooled, but I am sure this one may have all the parts (seals and diapragms) that you would need.
Best read the blurb or contact Brickwerks directly via email.
I presume yours is the pict 2 or 3, whereas the DF would have been the pict 4 or 5.
My 1983 DF has a Pict 5 fitted.
-----------------------------------------
This is the 2.0 CU two carb pdsit kit.
https://brickwerks.co.uk/product/carb-r ... 3-2-0l-cu/
Again... click on the "ask question about the product" link on the website for the correct info.
Just to make sure that I am not giving you duff info.
https://brickwerks.co.uk/product/carb-r ... t3-1-9-df/
Not quite the exact air cooled carb quoted, but the later DF waterboxer version. -
I couldn't see any carb kits for the 1.6 air cooled, but I am sure this one may have all the parts (seals and diapragms) that you would need.
Best read the blurb or contact Brickwerks directly via email.
I presume yours is the pict 2 or 3, whereas the DF would have been the pict 4 or 5.
My 1983 DF has a Pict 5 fitted.
-----------------------------------------
This is the 2.0 CU two carb pdsit kit.
https://brickwerks.co.uk/product/carb-r ... 3-2-0l-cu/
Again... click on the "ask question about the product" link on the website for the correct info.
Just to make sure that I am not giving you duff info.
1983 Tin Top with a poorly DF and 4 speed DT box.
1987 Electrics and a DJ engine.
Maybe one day I might get it finished
1987 Electrics and a DJ engine.
Maybe one day I might get it finished
-
sarran1955
- Registered user
- Posts: 1469
- Joined: 11 Mar 2009, 18:51
- 80-90 Mem No: 6754
- Location: 6, les Hauts de Sarran 19800, Sarran ,Limousin ,FRANCE
Re: Pict 34 carb.
Hello,
Just a Sunday morning browse...
This video may be useful..
Spares for these are available, including main jet, air brake jet and emulsifier tube.
Steer clear of the Empi kits
Here is a link to my preferred supplier, click icon at the top to get English.
https://www.carburateurwinkel.nl/conten ... delen.html
These Pict 34/4 carbs are simple, reliable and efficient...
and in France you can run on E85 ethanol...
Cordialement,
Just a Sunday morning browse...
This video may be useful..
Spares for these are available, including main jet, air brake jet and emulsifier tube.
Steer clear of the Empi kits
Here is a link to my preferred supplier, click icon at the top to get English.
https://www.carburateurwinkel.nl/conten ... delen.html
These Pict 34/4 carbs are simple, reliable and efficient...
and in France you can run on E85 ethanol...
Cordialement,