PDSIT carbs on 2.0 liter engine

[xyzzy]

Here's another good reference that shows the main cavity feeding both the primary discharge as where as the carb mixture discharge and transfer ports.

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1973 VW Westfalia 2L hydraulic, dual Solex PDSIT
1987 VW Vanagon Westfalia

[mcdonaldneal]

I'm no longer trying to solve a problem, as I've decided that the oil temperature measurements I am getting are probably normal.
I am still fine tuning a little though.
I measured the float levels, without the original 'Solex' 0.5mm gaskets in place; 14mm on the left and 14.5mm on the right. Spec is 12-14mm I believe, so I could cut some new ones from 1.6mm gasket material I have. I only have 1mm washers for the float valves.
I changed the air correction jets to 130's and went for a ride.
(Mains are still 137.5)
Not much change. The AFR at 62mph is still around 13.7, but at wide open throttle it is a little lower at 13.3
As you would expect, I guess. I'll see how things feel on our long camping trip to Glencoe this weekend.

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1978 marino yellow Bay Dormobile camper
1969 signal orange Karmann Ghia convertible
1976 martini olive Bay Dormobile camper

Stop dead photo links! Post photos to The Samba Gallery!

[xyzzy]

[Amskeptic]

[quote="xyzzy"]

[mcdonaldneal]

[xyzzy]

[xyzzy]

The Pierburg 12V 55 idle jet solenoid cutoff valve is:

PE 20357/55 12V 8291
Part #056 129 413 D

I have two in the mail and will report back
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1973 VW Westfalia 2L hydraulic, dual Solex PDSIT
1987 VW Vanagon Westfalia

[Alan Brase]

I assume there is no reason these HAVE to be electric cut-off jets except by original equip specification? I think one can just screw in fixed Solex idle jets. I once installed a set of Eurospec (Overland Parts) Brosol 32-34 PDSIT replacement carb and they did not have electric cut off idle jets, but rather the fixed jets.
The cut off jets make run on less likely and are also easy to check carb balance by selectively unplugging them. But on a manual trans car they are not necessary. Not sure about automatic.
Al
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Al Brase
Projects: 67 sunroof bug, 67 Porsche 912 Targa, 70 Westy
Dec 1955 Single Cab pickup WANT 15" BUS RIMS dated 8/55, thru 12/55
To New owners: 1969 doublecab, 1971 Dormobile
Vanagons:
80 P27 Westy JUL 1979, 3rd oldest known US
83 1.6TD Vanagon, 87 Wolfie Westy daily driver, swap meet home

[Alan Brase]

I assume there is no reason these HAVE to be electric cut-off jets except by original equip specification? I think one can just screw in fixed Solex idle jets. I once installed a set of Eurospec (Overland Parts) Brosol 32-34 PDSIT replacement carb and they did not have electric cut off idle jets, but rather the fixed jets.
The cut off jets make run on less likely and are also easy to check carb balance by selectively unplugging them. But on a manual trans car they are not necessary. Not sure about automatic.
Al

Like this one on a 32PBIC from a 1956 Porsche 1600N.
The hex plug with the straight slot and a steel ball in the hole.
It is marked (hard to tell, small script g 55?) and SOLEX
Years ago, I used to buy them from Foreign Auto Supply. Southern California. Not much money.
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Al Brase
Projects: 67 sunroof bug, 67 Porsche 912 Targa, 70 Westy
Dec 1955 Single Cab pickup WANT 15" BUS RIMS dated 8/55, thru 12/55
To New owners: 1969 doublecab, 1971 Dormobile
Vanagons:
80 P27 Westy JUL 1979, 3rd oldest known US
83 1.6TD Vanagon, 87 Wolfie Westy daily driver, swap meet home

[orwell84]

When I ran these carbs years ago, one of the large cutoff jets stripped the threads it was screwed into causing a big vacuum leak which I fixed with JB weld. It held up for years. I stopped using them when the engine swallowed the second set of accelerator pump tubes.

All superbly repaired by Tim at Volkzbitz. He replaced one of the cutoff jets too. I will have a look to see which one...

[Amskeptic]

[mcdonaldneal]

[SamboSamba22]

I’ve often wondered the actual condition of my cut-off solenoids on my PDSIT 34, original carbs on my ’74 Westy.
I had to pick the pair I’m currently running for a couple of years now of a type 1 1600 motor, and honestly don’t know if they are correct for my application, as when I did have my bus running nicely, the bus would still like to diesel when I shut it off.
Did we conclude what vendor is best for replacement cut-off solenoids for our PDSIT carbs?
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The Bus Barn Ltd. Co.

Oct. ’67 Double Cab (’68 Crew Cab)
[url=http://www.vw-mplate.com/mplate-44412.png]Click to view image[/URL]
March '69 Delivery (Panel Bus)
[url=http://www.vw-mplate.com/mplate-44414.png]Click to view image[/URL]

[xyzzy]

Definitely try and find the Pierburgs. I haven't had any luck at all with the cheaper parts.
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1973 VW Westfalia 2L hydraulic, dual Solex PDSIT
1987 VW Vanagon Westfalia

[Culito]

Hey guys, I'm also trying this experiment and was wondering if you fine folks could condense the large amount of great info in this thread.

Here's my build:
-Formerly 1800 AW engine, now 2.0L. I received it in bad shape (loose valve seats, EGR system full of holes, etc). Looks like it had been thoroughly abused.
-New heads, P&C set from Bugguy1967
-blocked off brake booster ports, no EGR or charcoal canister (this is not going in a bay bus).
-Rebuilt and re-bushed the stock Solexes, installed 140 air and 132.5 mains.
-Stock DVDA
-Stock air filter, horns, etc
-All new gaskets, hoses, seals, etc.

Situation:
-right now won't idle off chokes, pops out carbs, impossible to tune or get to idle without a massive amount of advance. Seemingly very lean. I have studied Colin's tune procedure but any fine adjustments are impossible at the moment.
-Will look again for vacuum leaks but since everything is new, not sure where that could be.

Regarding jetting, wondering if I'm in the ballpark there and:
-do I need to worry about the idle cutoff jet sizing?

Thanks for any help, wonderful Sambanistas!
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Copyright CJ Industries, Inc.
'64 standard w/2.0L type 4
'62 bug

[xyzzy]

[wcfvw69]

[Culito]

Will double check firing order but I'm 99.99% sure that is correct.
Using a Pertronix.

Can't find any vacuum leaks...yet.
Solenoids click nicely and I cleaned them thoroughly. Can pull and double check those.
Haven't checked float levels yet. Can I just pull the carb top off and check these in situ? Tips on measuring?

Thanks guys!
_________________
Copyright CJ Industries, Inc.
'64 standard w/2.0L type 4
'62 bug

[airschooled]

[Culito]

So!
I started with the left side and measured the float level to be 17mm from the top. I had a spare gasket so I stacked them and that brought the level up to 14.5...ish.
Close enough, I think.

I did however, make another discovery:

It appears that I have a 55 idle in one side, and a 52.5 in the other (can anyone confirm that that is the jet size stamped there?)

I swapped them side-to-side and the carb started popping out of the 52.5 side (right side this time, was popping mostly out of the left).
It only takes a minute for things to start going crazy after a cold start!

I'm hoping this is the smoking gun.
I'll see if I can find two 55 idles locally and ditch the electromagnetics, if this is indeed the problem.
_________________
Copyright CJ Industries, Inc.
'64 standard w/2.0L type 4
'62 bug