Recommendations:67 Bug 1600cc Solex 30/31 problems with stalling

[674me2enjoy]

I have a 67 Bug with a 1600cc build that was done a few years ago. Presently has a unknown aftermarket single port intake with some aftermarket spacer with a Solex 30/31 PICT carb with a stock 67 Distributor. I just recently had the valves checked/adjusted which check out good. The tech said the “THE ENGINE WAS FALLING ON ITS FACE UNDER ACCELERATION” or stalling at first, which he felt like was due to a mismatch of carburetor and distributor and intake manifold. He recommended possibly upgrading carb to a EMPI 34 PICT-3 or continue using the Solex 30/31 carb (Like new) and going to a better Intake manifold, possibly a dual port and upgrading to an electronic distributor (example Pertronix SVDA #186504) along with a better coil (blue coil or Pertronix 40,000 volt coil.) The engine was rebuilt about 2500 miles ago with a new 1600 single port case, new heads, reconditioned cam (specs unknown), Solex 30/31 carb etc. Use of stock distributor with points.

Recommendations? Not wanting to go back into the engine. Would like to work with what I have as far as interior parts. Would like to get the most performance out of some exterior changes with reliability. Wouldn’t rule out going to twin Webers 40s possibly. Suggestions....thank you

[sgmalt46]

you need a svda dist. that stock one is vacuum only .works sweet with the stock 30pict-1 with power jet. the 30/31 does not pull enough vacuum . your (TECH) should know that . I run a german 009. works for me. with the 30/31.i know will get yelled at.
_________________
55 deluxe 23 window bus
64 crew cab
55 rag top beetle
66 beetle
71 square back (sold) ! good luck with it Henry!
46 beetle 552nd royal army service corps CCG

[glutamodo]

The above comment is WRONG.

The traditional vacuum advance fitting on the Brosol H30/31PICT is blended vacuum intended for a vacuum-only distributor.

This engine has a vacuum-only distributor. IT IS A MATCH.

The only fitting suitable for SVDA on this carburetor is the angled one all the way on the right side of the carb, and that is not the one being used here.
_________________
Andy T.


IMAGE NOTE: It has been noted that Chrome based browsers may have issues in displaying my vast image library, which use non-secure links and are on an FTP server. Images should still be viewable if the link is clicked though.
I do not know how to fix this. All I can say is it all works fine for me with what I use, Firefox.

[674me2enjoy]

Andy so your saying the Solex 30/31 is a match for the stock vacuum distributor? Also your saying the location the the vacuum adv hose is connected presently on this carb (left side) needs to be switched to the angled one on the right side of the carb towards the base?

[anthracitedub]

Have you determined if the accelerator pump is working properly and the spray nozzle is positioned correctly in the carb?

You’re gonna get in trouble by the samba policia for your fuel filter location and lack of security on the fuel lines😁

I’d also recrimp that power wire on the left side of the carb, if that slips out... there’s potential for some issues.

[674me2enjoy]

Accelerator Pump working properly and spray nozzle positioned correctly. I will work on the other noted issues.

[glutamodo]

[674me2enjoy]

Thanks I will switch the vacuum hose. Hopefully it will have some affect on the carburetor stalling out. I guess you feel comfortable with what I have and you would suggest trying this out for awhile to see how it works out before changing out the distributor etc.

[674me2enjoy]

I still have a flat spot after warming the engine up, when I accelerate.

[Cusser]

[674me2enjoy]

The only difference is i have a single port. I will figure it out eventually! Thanks

[674me2enjoy]

I’ve found from some research that the adapter plate thats beneath my Solex 30/31 carb was intended to be used only on a dual port Intake which I don’t have! I assume this should be removed?

[Cusser]

[674me2enjoy]

I understand what your seeing but someone has put a dual port upper intake then it goes to a single port lower intake outlet towards the heads.

[glutamodo]

[674me2enjoy]

Sounds good. I’m planning on going back to an original Solex German 30-PICT 1 carb and a stock EMPI intake manifold. Which I feel like will be a better match with the stock distributor.

[tasb]

If your vacuum canister was bad you'd know it! You'd have exactly 0 degrees of advance and would only run ok at idle. You should verify that you are gettting close to 30 degrees of maximum advance.

The Samba policia have beaten the fuel filter thing to death. Actually that stock cloth covered hose grips the fuel pipes and the filter really well., the warning you'll get is overated IMHO. I haven't run one of those filters in years on three VW's and I've had no issues. There are filters in your gas tank and in your fuel pump, if it has a screw on the lid.

You might want to consider the stock German intake manifold and a restored German Solex 30 PICT carburetor rather than Chinese made Empi.
_________________
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

[Cusser]

[674me2enjoy]

I checked my advance, I’m getting close to 30 degrees maximum advance. I also checked the adapters and rubber boots for air leaks! Sure enough there was air leaks at the boots and the adapters. Repaired the leaks, definitely helped out on the flat spots. Still planning on going back to a stock single port intake and a stock Solex German 30Pict-1 carb. Thanks again for all the suggestions.

[FL-Frank]

I used to experience similar issues with my ‘67 Beetle. When I bought it 5 years ago, it had an incorrect carb, distributor, and fuel pump and plugged manifold tubes.

So, I sourced a restored German Solex 30Pict1 carb, a restored 205K distributor, a restored Pierburg pump, and a restored 701k manifold...all from the classifieds here.

Once I installed all of these parts (along with a correct thermostat which was missing), the car runs great!

IMO, although restored original parts will probably cost more than the similar aftermarket parts available, the quality and longevity of the restored original parts are far superior!
_________________
“Tinker Toy” 1967 Savannah Beige Beetle Sedan...........Mostly Original Survivor
“Fritz” 1964 Gulf Blue Karmann Ghia Coupe...Complete Pan-Off Restoration SOLD