34 pic 3 carb with 113-905-205AN distributor/Bosch 07102 vac

[pernest]

I have the original carb that came with my 73 std manual trans beetle and would like to rebuild and run it on my VW. I also have the original dist (113-905-205 AN with its vacuum canister (Bosch 07102) which unfortunately has a shot diaphragm. I see Bosch 07102's on ebay and at parts houses NOS for prices ranging from $50 to $100. I wonder just how good the diaphragms are in those 40 + year old parts --- seems like a roll of the dice to me.

I would really like to be able to use the original carb and dist on the car. Is there a close substitute you can recommend for the Bosch 07102? Thanks for any help you can give me.

Peyton

[Juanito84]

Will it's either a 40 year old part, used or new, or a Mexican Beetle setup, which can be 15 years old but you need the whole setup, or an aftermarket distributor, or a digital distributor.

The 40 year old never-been-used parts are usually just fine. If it works when you get it it should keep working, especially if you can keep gasoline out of it (metal tubing with a "rise" in it) and avoid ethanol like the plague. (Ethanol eats vintage rubbers.) If you can't find your particular diaphragm in a new condition then check out this page to see which diagrams are similar: http://www.thesamba.com/vw/forum/viewtopic.php?t=617242

The new aftermarket junk usually doesn't advance soon enough nor as much as you need. Some have springs that are so tight the vacuum cans never advance. Some people have taken them apart and installed lighter springs. I've tried taking them apart and I can say it's not easy. I won't ever try it again myself.

If you don't want a 40 year old part then I'd suggest something digital like a CB Black Box. Of course by then you're straying from a true restoration. Although digital does allow you to fine tune the timing and get as much fuel mileage out of it as possible.
_________________
If a water cooled engine cools its water with air, isn't it just an overcomplicated air cooled engine?

[Mojo07470]

Not to hijack. But whats a cb black box and where can I find one? Sounds like a better way to go.

[Juanito84]

[tasb]

There are lots of good used 07102 vacuum canisters out there. Have you removed the canister from your distributor to verify that you have a bad canister? Typically the canisters advance side is still good and the points plate is stuck due to hardened grease. The retard side of these canisters has usually failed.

There is only 2-5 degrees of advance from the canister so it won't be moving the pull rod a lot when you apply suction to test the canister.
_________________
Roads Scholar &
1957 Kombi low mileage 36 hp governor equipped M 178 Slow Drag Winner 2014, 2015, 2018

1965 hardtop Deluxe Microbus owned since 1990 M 620 factory 12 v 1500cc

1961 (October)Single Cab- Road Trip Workhorse

[pernest]

Thanks tasb.

I've tried suction against both ports on the pot and I believe the diaphragm is shot for both advance and retard functions.

This is basically a project for me since I'm currently running a 010 dist with a Brozol H30/31 and the car seems to be running great. The 34 pic 3 and Bosch JFU4 distributor are, I believe, original to the car which I have owned for over 18 years.

I've ordered a carb rebuild kit and replacement advance vacuum pot (07-059) from Aircooled.net. They have been helpful. We'll see how all this turns out.

When I bought the car in 1997, on first sight, my wife referred to it as a POS. My wife is very sweet and considerate person and I have to agree that her assessment was well grounded. However, over the years, we have driven the car on 1000 mile trips and have used it as a back up daily driver. For back up, it was either the VW or a Model A Ford which now has over 100k on it. The Beetle is better on gas.

I had the engine overhauled at 115k and have added another 73k to that. It might be a POS but its a good one!

Peyton

[Juanito84]

That vacuum advance can should work. It doesn't have the retard function though. Vacuum advance mainly allows you to cruise leaner and get better fuel mileage and emissions. Not having it won't affect full power.
_________________
If a water cooled engine cools its water with air, isn't it just an overcomplicated air cooled engine?

[tasb]

When you are looking for an original used replacement you won't find 07102 anywhere on the vacuum canister. The short number will be stamped onto the pull arm it is 889.
_________________
Roads Scholar &
1957 Kombi low mileage 36 hp governor equipped M 178 Slow Drag Winner 2014, 2015, 2018

1965 hardtop Deluxe Microbus owned since 1990 M 620 factory 12 v 1500cc

1961 (October)Single Cab- Road Trip Workhorse

[Rex lucy]

running an 010 and wants a 205 . wow

[Luft kühl]

[ROCKOROD71]

[Rex lucy]

if a 205 is advertised for 25.00 dollars and a 010 is advertised at 150.00 dollars, what does that indicate.

[Juanito84]

[pernest]

I'm glad that people love the 010 so much and I'm certainly in no hurry to get rid of it. I know that the 010 has very good value in VW circles.

I just would like to see if the car can run smoother with the 205. With the 010 and 30/31, I get about 22 mpg in town and close to 30 on the road. So, its a good setup.

My research indicates that the 205 with operational vacuum advance does well with a 34 pic 3. I'm not really concerned with speed as an air cooled VW ain't fast under most any circumstance and, if its somehow modified to be fast, its probably not very reliable.

I have enjoyed the feedback from all and have learned some new things.

Peyton

[Juanito84]

[tasb]

Interesting thoughts, opinions and lessons above.

I can testify that some of us are waking up and realizing that vacuum advance has its place in the VW world. At certain times of the year I have more restoration requests than I can comfortably handle.

Twelve years ago I was running a 009 in my dual port 1965 Bus. Through carb jetting and living at 6,000+ feet I was able to get the hesitation down to minimal. I was working my way back to original equipment and installed a 113 905 205 T distributor and even though mismatched it ran sooo much smoother than the 009's performance. I was even more amazed at the performance difference when I then installed a German Solex 30 PICT 1= a matched set.

I haven't looked back and have enjoyed restoring vacuum advance distributors for the VW community for 11 years now.

btw we should be referring to specific distributors either by their full part number or at least the first three digits and the letter suffix not the middle 205. The 205 is VW part number lingo for distributor which is redundant when we are already discussing distributors. There are literally hundreds of air cooled VW distributor versions and they are nearly all 205's. Even the 0 231 129 010 has a VW part number though it doesn't often appear on the badge.

Juanitos post above is one of the best descriptions of what is going on between the PICT 34 and the 009 distributor that I have read in a very long time. Most of the time we just read parroted responses.
_________________
Roads Scholar &
1957 Kombi low mileage 36 hp governor equipped M 178 Slow Drag Winner 2014, 2015, 2018

1965 hardtop Deluxe Microbus owned since 1990 M 620 factory 12 v 1500cc

1961 (October)Single Cab- Road Trip Workhorse

[tasb]

As far as 40+ year old parts go, I have been regularly running/installing used vacuum canisters and NOS tune up parts some of which are 40+ years old without any failure. I can't say the same for some of the new "stuff".
_________________
Roads Scholar &
1957 Kombi low mileage 36 hp governor equipped M 178 Slow Drag Winner 2014, 2015, 2018

1965 hardtop Deluxe Microbus owned since 1990 M 620 factory 12 v 1500cc

1961 (October)Single Cab- Road Trip Workhorse