TheSamba.com :: View topic - Check this carb/distributor combo. Are they compatable?

Tue May 08, 2012 4:20 pm

I have been working on this rebuild for about a year and a half so far. A few hours a week if Im lucky. Just rebuilt engine, installed new wiring harness. Go the engine to start, but need to adjust the carb, points, distributor, timing etc. Before I begin attempting to fine tune everything, I wanted to make sure that my carb and dist are compatable. I've read several posts on the subject, but I havent seen any compatability charts on the subject.

My engine is a 73-1600dp with a stock cam. I have installed a new EMPI Monza type header. My car is a 67.

The numbers stamped on the back of my dist are as follows...
JFU4
0231167070
113905205AN

My carb is a freshly rebuilt 34 PICT-3

Should I proceed with the tune up and adjustment or do I need a diff dist?

I understand from my Bug Me video that my dist requires a timing light (strobe) for adjustment because it has two vaccum nipples. Does that sound right or can I just use the tester light and Mr Higgens explains for the other types of distributors?

Thanks in advance for your help. You may proceed with the beratings...I can take it.

Tue May 08, 2012 4:28 pm

Sounds like a Bosch vac advanced distributor ? if so, yes. It should work. Just be sure to connect the vac line from the left side of your 34 pict carb. Plug right side. You could get a run of the mill 009 and get it running well.

Tue May 08, 2012 4:30 pm

Here is the engine just after installation. I started and ran with a rough idle. I was pretty excited at the minor accomplishments.

Now to get her in tune!!

Tue May 08, 2012 4:32 pm

The carb has fittings for both advance and retard, so it's probably a carb set up for DVDA... if it's German that is. (Aftermarket, it's probably not, despite the presence of the retard fitting) But it looks German in the photo. However I will ask, what is the modification state number on the left side base flange of the carburetor?

Here's my chart of the most common USA carburetors and their factory matching distributors... the number I asked about just now, are the ones listed here.

Tue May 08, 2012 4:36 pm

Tdog71 wrote: Sounds like a Bosch vac advanced distributor ? if so, yes. It should work. Just be sure to connect the vac line from the left side of your 34 pict carb. Plug right side. You could get a run of the mill 009 and get it running well.

Is it true that with out the vacuum advance, I may lose power on hills? I had considered a new distributor but wasnt sure it was necessity.

Tue May 08, 2012 4:37 pm

Might I offer up a vist to this page: http://www.glenn-ring.com/bosch/
Glenn is a mod of this forum and will help you out. His work is top notch, as I have his product running on my car.

Tue May 08, 2012 4:41 pm

scottyellow67 wrote: Tdog71 wrote: Sounds like a Bosch vac advanced distributor ? if so, yes. It should work. Just be sure to connect the vac line from the left side of your 34 pict carb. Plug right side. You could get a run of the mill 009 and get it running well.

Is it true that with out the vacuum advance, I may lose power on hills? I had considered a new distributor but wasnt sure it was necessity.
Not power loss, no. Hesitation when first pressing pedal ? Perhaps. You have many options for some fantastic non vacuum advanced dizzys. Bosch 010 or 019 are great examples. Pop a mail to Glenn Ring. He will hook you up

Tue May 08, 2012 4:42 pm

glutamodo wrote: The carb has fittings for both advance and retard, so it's probably a carb set up for DVDA... if it's German that is. (Aftermarket, it's probably not, despite the presence of the retard fitting) But it looks German in the photo. However I will ask, what is the modification state number on the left side base flange of the carburetor?

Here's my chart of the most common USA carburetors and their factory matching distributors... the number I asked about just now, are the ones listed here.

It says Made in Germany on the side. The stamping on the left is 377_1
On the right is B2-291.
Forgive me, but what is DVDA?

Your chart indicates that I want it firing at 5Degrees after TDC, am I reading it correctly? Not 7.5 degrees before...correct?

Tue May 08, 2012 4:44 pm

Does the main jet number refer to its part number, or a setting (how many turns from seated)?

Tue May 08, 2012 4:46 pm

The d means dual. 2 vac lines versus single, which is called svda. The main jet as shown above is size in MM. 127 is 1.27mm etc

Tue May 08, 2012 5:01 pm

DVDA - dual vacuum dual advance. It's got two vacuum hoses one it. It is the retard line that makes it so it gets timed at idle with the carubetor correctly set up, to 5° ATDC. That is IF the retard section of the vacuum canister still works... they often go bad. If so, don't use the hose and put a plug in the line from the carb there, and time it based on the total advance of the centrifugal part of th e distributor (around 30-32 total advance with the vacuum advance line unhooked.

The main jet numbers refer to the numbers stamped into the jets. :D

The letter "X" may or may not precede the number, either way, just go by the number.

Tue May 08, 2012 5:11 pm

Ok, I saw on the video how to test the vacuum canister...and I read on Samba of a guy having difficulty trying to find a replacement. If my Vac Can is faulty, I wonder if Im just as far ahead to get a new distributor?

Now the Zinger, I was considering if I am replacing, going with a Pertronix "points-less" model for ease of set up..plug and play??? Are they a pretty easy install and tuning?
This car will not be a daily driver. It will be more of a weekend cruiser or ice cream getter for me and the family.

Thoughts???

Tue May 08, 2012 5:13 pm

scottyellow67 wrote: Tdog71 wrote: Sounds like a Bosch vac advanced distributor ? if so, yes. It should work. Just be sure to connect the vac line from the left side of your 34 pict carb. Plug right side. You could get a run of the mill 009 and get it running well.

Is it true that with out the vacuum advance, I may lose power on hills? I had considered a new distributor but wasnt sure it was necessity.

Is the 009 ok with my 34 PICT-3?

Tue May 08, 2012 5:15 pm

scottyellow67 wrote: scottyellow67 wrote: Tdog71 wrote: Sounds like a Bosch vac advanced distributor ? if so, yes. It should work. Just be sure to connect the vac line from the left side of your 34 pict carb. Plug right side. You could get a run of the mill 009 and get it running well.

Is it true that with out the vacuum advance, I may lose power on hills? I had considered a new distributor but wasnt sure it was necessity.

Is the 009 ok with my 34 PICT-3?
One of the most common setups, ever. So, yes. If you run the 009, be sure you cap off the vac ports on your carb.

Tue May 08, 2012 5:29 pm

Do the electronic distributors require a timing procedure be done,or do they calibrate them selves?
I have learned more in the last 1/2 hour than I have in 3 days of reading posts. Thank you for sharing all your expErience guys!!

Tue May 08, 2012 5:32 pm

Personally, I'd avoid the 009 with a 34PICT-3. Back in the early and mid 90s I had a 300-series carb and an 009 in my Baja... I hated it. They do not work together well. I'd rather run the DVDA with the vacuum retard unhooked and plugged - as an SVDA in other words.

One thing though, the DVDA carbs have a larger hole in the throttle butterfly, this can make them hard to set up to idle when you advance the timing to 7.5BTDC... as the air bypass screw ends up at the end of its range to get the idle speed correct, unless you do something about the size of the hole there. More on that here:

http://www.thesamba.com/vw/forum/viewtopic.php?t=365762&

-Andy

Tue May 08, 2012 5:34 pm

scottyellow67 wrote: Do the electronic distributors require a timing procedure be done,or do they calibrate them selves?
I have learned more in the last 1/2 hour than I have in 3 days of reading posts. Thank you for sharing all your expErience guys!!
Electronic as in no points to set within the cap ? No. You still have to time the distributor. The gift of having what you mention is no points wear out. Maximum advance is what has worked for me. An 009 is some 28 to 30 degrees advanced set at 3000 rpm. I am away from my notes, but that is the usual, I believe

Tue May 08, 2012 5:36 pm

glutamodo wrote: Personally, I'd avoid the 009 with a 34PICT-3. Back in the early and mid 90s I had a 300-series carb and an 009 in my Baja... I hated it. They do not work together well. I'd rather run the DVDA with the vacuum retard unhooked and plugged - as an SVDA in other words.

One thing though, the DVDA carbs have a larger hole in the throttle butterfly, this can make them hard to set up to idle when you advance the timing to 7.5BTDC... as the air bypass screw ends up at the end of its range to get the idle speed correct, unless you do something about the size of the hole there. More on that here:

http://www.thesamba.com/vw/forum/viewtopic.php?t=365762&

-Andy
I have heard that too. It is a matter of taste, I guess. One just needs to dial it in

Tue May 08, 2012 11:34 pm

Pointless ignition is great as long as it does not break. So carry a set of points in the glove box if it does.

Wed May 09, 2012 4:09 pm

Tdog71 wrote: glutamodo wrote: Personally, I'd avoid the 009 with a 34PICT-3. Back in the early and mid 90s I had a 300-series carb and an 009 in my Baja... I hated it. They do not work together well. I'd rather run the DVDA with the vacuum retard unhooked and plugged - as an SVDA in other words.

One thing though, the DVDA carbs have a larger hole in the throttle butterfly, this can make them hard to set up to idle when you advance the timing to 7.5BTDC... as the air bypass screw ends up at the end of its range to get the idle speed correct, unless you do something about the size of the hole there. More on that here:

http://www.thesamba.com/vw/forum/viewtopic.php?t=365762&

-Andy
I have heard that too. It is a matter of taste, I guess. One just needs to dial it in
"Dialing it in" for this combo means a big sacrifice in gas mileage, since the 34-3 needs to run really rich to compensate. There are many other carbs that play much better with the 009.