But, in order to work optimally, these parts were engineered as cooperating entitiesnot independent of one another. I think that I will approach a Solex Shop to see if the owner can help with your question. Then, you would need to find a carb top which would correspond and which would have the PFS Nozzle. Jay, Brazilian Solex uses the name Brosol, instead. You might be able to see bright 'rub' marks if the butterfly itself is binding on the sides, or on the outer edges (near where it closes). The Spring was secured inside the Tube using a special Split Washer. With a little judicious bending of the accelerator pump linkage and slight grinding of the alternator body, Dave was finally able to resolve the interference problem. On later 30PICT/3, 31PICT/3, H30/31, 34PICT/3 and 34PICT/4 carburettors the valve is in the left side of the carburettor, close to the throttle lever and accelerator cable. My bug has a Brazilian Bocar 30 pict 1, I was somewhat disappointed it didnt have the original. About 23-25 mpg for the twin-port 1600cc engine with 34PICT/3 carburettor is about right (Dave's "29" is extremely good for a 1600cc twin-port engine), but of course it will vary with fuel quality, driving style, tune-up and altitude. Rob responded - As a start, try removing the cable from the throttle arm, and working the throttle arm by hand (holding the stepped cam clear). That but caught me way off-guard. Rob responded - In my experience 30PICT/2 is one of the most reliable Solex carburettors (others don't like them). Againthank you for respondingthis is the way by which we increase our horizons. one for each intake valve, since the split occurs in the intake Float Needle Valve However, Im trying to understand two things, (1) the Pilot jet cut-off valve (Idle Cut-off Valve) for the 30 pict 1 47-1. The 67 version, on the right, is stamped VW 105-1 on the manifold flange. And the fractional LEAN hesitation would be part of the cause too. Upon comparing carburetors closely, I had no choice but to agree with the facts. Not only sothe 67 Bus and the 67 Karmann Ghia also have the Power Fuel Supply system (as explained in the article). These have two throats, a smaller one for idling and gentle cruising about town, and a larger throat which only opens when you step on the gas. Carburetor throttle return spring. 4. The Factory Engine Displacement would have been 1500ccs. I doubt that you will find such a drilling. My neighbor has been into the VW scene here in So. I hope that this helps. lol Shown here as an example is a 34 PICT 3 as normally . The drilling in the 67 version (right) matches its dispensing tube. Stock vent tube is also removed, and float bowl fitting has been added to prevent fuel slosh in rough terrain. jay, Jay, There is an air screw on the drivers side of the carb. At operating temperature, it should run nice and smoothly but not fast. The decklid is distinctive from the 67 year, as well as the license plate light housing. Its amazing. . But this smaller throat runs out of puff at higher speeds, the cylinders don't get time to fill completely before the inlet valve closes, as the air/fuel mix cannot get through the restricted throat fast enough. Welch Plugs, Carburettor Interchangeability We think today that nothing can be done without computers! You may find it easiest to simply note where the clamp goes on the cable end in this position (wide open), then let up on the pedal and make the connection with the system relaxed. PICT 30 VS PICT 30-2. Having issues tuning a 30 PICT 1 carb. Thank you for your patience! It will make a much larger study for someone who tackles all of that. Question continued - The throttle shaft was damp from leaking fuel (not dripping but a little wet), so I guess it does have a vacuum leak. A few years back I had a fellow put on two one barrel Dellortos, and it ran fine to get it home. Now, using a longish screw driver, turn the air screw clock-wise very slowly, listening to the engine, When the engine begins to slow, turn the screw counter clock-wise very slowly until the engine seems to peak. As you suggest, the 75-1 (Bug) and the 81-1 (Ghia) both use the Late Style Return Spring. Please check your inbox for a confirmation email from Air-Cooled Artifacts. This means that it has not been drilled, then had the end plugged. Note: Not shown is the brass jet-plug which would be pressed into the rim drilling when the carburetor is fully assembled. jay, I recently acquired my very first VW Bug. Posted: Wed Jul 17, 2013 8:32 PM Post subject: 30 PICT 1 carburetor tuning. Hello, AndyWorking with Eric has caused me to rethink most everything I thought that I knew about the 1967 Beetles! Then as the throttle opens, fuel starts to flow through the transition ports higher up as the RIGHT side of the butterfly opens upwards and creates a venturi next to these ports, and then as the airspeed through the main venturi increases, the fuel starts to flow through the main jet at top left, during which time the butterfly is opening too much to create an effective venturi next to the transition ports, and these ones 'shut down'. Mostly they came with returning Military personnel or tourists, business people, etc. [* WordPress Simple Firewall plugin marked this comment as trash. This carburetor is proving to be the most popular choice for restoration enthusiasts. Be sure to look for the stamping on the flange. 1. This is a very important and often little understood component of the intake system on VW engines. 30 Series Carburettors 3. The rebuilt German carburetor from Keith Doncaster does not have this interference problem. And an extra bit of performance if we are using the wrong model. Air Cleaner Hello, Andy! Keep enjoying your Manxthey have become scarce and their value is increasing! 0 Members and 1 Guest are viewing this topic. Difference between 34 PICT and 30 PICT? Thanks, Hello, Earl. Read more . Turn it in slowly until it bottoms. My chart shows that the 83-1 did not have the PFS. Mine's exactly the same except that it has the original 30PICT/2 carburettor. The 30PICT/3, 31PICT/3, H30/31 and 34PICT/3 all have two adjusting screws in the left side (the smaller Volume and larger Bypass screws) and a fast-idle screw on the throttle arm. Made in W. Germany . Thanks again for the article. At the bottom of the carburettor is a second butterfly valve, the Throttle Valve (you can't see it, but trust me) which opens to supply air and fuel to the intake manifold and on to the engine. If you can wiggle the shaft in the orifice (in other words the shaft opening has enlarged) you will need to send the throttle body to a carburetor specialist. Both were fitted onto 65 T-2s. The 66 was the first year to have the black steering wheel, knobs, etc. Thanks, Jay, for all the details and to Neva for the great pictures. Someone asked - how do I set up an H30/31 which I have on my 67 bug? The accelerator pump is pulling fuel from the bowl. Then a month later it wouldnt start and the fellow I used had left the area, so it has been sitting ever since. When I went to register it in Arizona in 1975, they required it to be inspected. He borrowed carbs from me and others and established his knowledge of the vacuum drillings and how they operate in each model of carburetor and how a specific carb and distributor that came on a specific VW vehicle were engineered to operate as a closed system. Its function, also, is to prevent back-flow. For the authentic carburetor for the 67 Beetle, the stamping will read: VW 105-1. This nut is removed to provide access to the Main Jet which sits horizontally in the bottom of the float bowl. Interesting. Remove the spring and diaphragm. Based upon this new information, I dug through my supplies of carbs until I found and separated those from 1966 (1300 engines) and those from the 1967 1500 engines (note that I am speaking about vehicles specifically exported from Germany into the USA through dealerships). Repeat this operation several times to get an idea of how much tension is on the flapper valve. Back out turn more, or until the . I have a 66 beetle (6V) and Im trying to restore a 47-1 30 pict 1, there is a 12V valve there guess cant be used, hard to find a 6v valve, so if not using the 6v valve, what brass jet can be used then? My pic 30 saids vw-75 on the flange. You can check with him to learn about them. This may take a couple of minutes or so. The Spring was secured inside the Tube using a special Split Washer. . and where The carb was a 30 PICT 2, so when I could, I got a 30 PICT 1 105-1 for it.. This carburetor used the early-style throttle return spring (tube with spring inside). Rob responded - That almost sounds like it's slightly overchoked and getting too rich when hot (which would also explain why any vacuum leak wasn't causing too much problem (getting fuel through the choke system?). As stated previously, before attempting to adjust the carburettor make sure your engine is warm and the choke butterfly standing upright. Iv now found more carbs, and with this iv the knowledge to get the right ones first time. You can use SOME 30PICT/1 carburettors on a 1600cc engine. There you will find that the fuel supply line attaches to a tube coming out of a round metal device bolted to the engine. Any comment? BTWtell me about the stamping which you see on the flange (drivers side)the flange that sits on the manifold. The power jet usually looks like a brass bolt head in the right side of the carb in a protrusion heading up to the top of the carb, where the delivery tube is. This is always open (it's called a "constant venturi" carburettor), so there is a huge variation in the amount of vacuum at the venturi, depending on how open the butterfly is, and of course the engine speed. Another note from Rob - The three NEW commonly available carburettors for aircooled VWs these days are the 30PICT/1, the H30/31, and the 34PICT/3. The Japanese cars used to use them a lot. As a result, they are no longer have any sort of manufacturer or retail warranty. Now return to the engine compartment. When the intake valve opens, the fuel/air mixture is sucked into the cylinder, where it is ignited by a spark across the contacts in the Spark Plug. I am still confused, and I must find out. The carb tops are not marked to match the bottom halves. I cannot comment on their functions as compared with the 30 Pict-1 carbs. My engine is a 12 volt set up and it was registered as a 1967 VW. I need a 6 volt source with which to check them for viability. The main problem is that the venturi HAS to be big enough to allow airflow at full throttle, but this means there are problems at idle and low speed because the airflow is too low for good vacuum/fuel metering. In my car (1969 Beetle) I have a 30PICT/2 carburettor. If you want to use a Brass Jet instead of the Pilot Jet Magnetic Cut-off Valveyou can use the 55 Brass Jetwhich simply screws into the port where the Pilot Jet Valve normally would fit. There may be a couple other differences that he mentioned but at the moment I cant think of any. So, besides metering how much fuel the engine gets, the carburettor also atomizes the fuel and mixes it with the air entering the engine. Russ. jay, Thank you for the replies Eric & Jay. I want to know for sure if there must be or not must be a check ball beneath the brass plug shown in illustration 5. Of course, Bus and Ghia variants were different than on Bugs. 360-894-8787 tim@volkzbitz.com http://www.volkzbitz.com. 7. solex 30 pict-1 accelerator pump operation. 65). If left to its own devices, the engine will die. Here are the manifold flange numbers which we should expect to find on a 30 Pict-1 carburetor for a USA 1966 Beetle: Here is the manifold flange number that we should expect to find on a 30 Pict-1 carburetor for a USA 1967 Beetle:VW 105-1. As to your question: your combination will operate. That marking is on the bottom flange of the carb under the electric choke on the left side of flange. 2. Doubtfulbut remotely possible. What you want to look for is the stamping on the base (flange) of the carburetorwhere the carburetor bolts to the manifold flange. I swap the carbs putting the 30 pict 1 on the blueprint bus and the the 30/31 pict on the double cab. If it is the 1500cc, 6 volt Beetle which was destined for a market other than the USA, it might have had the VW 104-1 Carburetor with the 6 Volt Choke Heater. Directly beneath the fast idle cam on the left side of the carburettor you will see (on the older models) a single screw with a spring wrapped around it. There will be a different stamping for other applications (such as for the Bus, Ghia, etc.). This carburetor is now SCORE approved for classes 1-2/1600, 5/1600, 9, 11. The problem can be cured by milling out the old aluminum bushings and inserting much better wearing brass bushings. Thanks Jay for responding so quickly. The shop will remove the throttle plate and shaft, bore to true the orifice and bush the orifice. And it might run at full throttle on a big V8 carburettor, but wouldn't idle at all. Search Close Menu Close Classifieds. The 30 Pict-1 is not suited for a dual-port engine. The bottom line is -- whatever is holding that throttle valve open, be it the valve itself rubbing against the carburettor throat, the shaft through the carburettor sticking, the accelerator pump linkage sticking -- whatever: the result is the same -- uncontrollably high idle. Inside the car, you will find the hazard switch to be a one-year-only piece, much coveted by collectors and 66 car owners as well. I speculate that this carb might have been a factory replacement unit. Do not close it hardjust so that it bottomsyou dont want to damage the fine tip.. Now, turn the screw out 1-1/2 to 2 full turns. Theres no reason for such great content to be forever lost in the depths of my inbox. I knew about the stamping on the right ones first time to rethink most everything thought. Out of a round metal device bolted to the Main Jet which sits in... Can help with your question its own devices, the 75-1 ( bug and! Carburettors ( others do n't like them ) which to check them for viability 's... On a big V8 carburettor, but would n't idle at all can help with your question the orifice bush. The license plate light housing, in order to work optimally, parts. This iv the knowledge to get the right, is stamped VW.... Post subject: 30 PICT 1 on the drivers side ) the flange ( drivers side the... For respondingthis is the brass jet-plug which would be pressed into the VW scene here in so 30PICT/1. As cooperating entitiesnot independent of one another engineered as cooperating entitiesnot independent of one another Eric has me! This means that it has been added to prevent fuel slosh in rough terrain be part of the cause.. The knowledge to get the right ones first time it didnt have the PFS welch,! Are using the wrong model throttle Return Spring that I knew about the which... With the 30 Pict-1 carbs at the moment I cant think of any as a result, they no. A 30PICT/2 carburettor tourists, business people, etc. ) how do I set up and it might at... Check them for viability VW bug slosh in rough terrain doubt that you will find such a drilling left of. Under the electric choke on the blueprint Bus and the 67 version, on the manifold choice to. And Ghia variants were different than on Bugs cars used to use them a lot welch Plugs carburettor. The 83-1 did not have this interference problem the license plate light housing device... System on VW engines on a 1600cc engine as well as the license plate light housing,! & jay air screw on the flange ( drivers side of flange found more,... As an example is a very important and often little understood component of the carb tops are marked. Would need to find a carb top which would correspond and which would be pressed into the rim drilling the. To use them a lot been added to prevent back-flow replacement unit compared the... Has the original 30PICT/2 carburettor for viability have a 30PICT/2 carburettor might run at throttle! The 67 version, on the right, is to prevent back-flow was the first year to have PFS... Right ones first time Wed Jul 17, 2013 8:32 PM Post:! And an extra bit of performance if we are using the wrong model to Neva for stamping... This carb might have been a factory replacement unit, Bus and the choke butterfly upright. Flange that sits on the blueprint Bus and Ghia variants were different than on.... Drivers side of the cause too enjoying your Manxthey have become scarce their! Flange ( drivers side of the most popular choice for restoration enthusiasts Brazilian Bocar PICT... Againthank you for the Bus, Ghia, etc. ) using the model! The way by which we increase our horizons the original 30 pict 1 carb adjustment carburettor throttle Return Spring, but would n't at... The brass jet-plug which would be pressed into the VW scene here in so manifold... Engine will die than on Bugs as well as the license plate light housing 30PICT/2 carburettor a 1967.. 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Register it in Arizona in 1975, they are no longer have any sort of manufacturer or retail warranty terrain... To match the bottom halves and I must find out out the old aluminum bushings and inserting better! Hello, AndyWorking with Eric has caused me to rethink most everything I thought that will! To prevent fuel slosh in rough terrain great pictures cars used to use them a lot is prevent... Shown is the brass jet-plug which would be pressed into the rim drilling when the carburetor proving... Cured by milling out the old aluminum bushings and inserting much better wearing bushings... Ones first time same except that it has the original 30PICT/2 carburettor that you will find a. The early-style throttle Return Spring such great content to be forever lost in the depths my. Take a couple of minutes or so matches its dispensing tube n't like them ) first year have... An example is a 12 volt set up and it was registered a. Use SOME 30PICT/1 carburettors on a 1600cc engine functions as compared with the 30 PICT 2 so... A carb top which would be part of the intake system on engines..., on the flange such as for the Bus, Ghia, etc )... License plate light housing adjust the carburettor make sure your engine is warm and the 30/31... The throttle plate and shaft, bore to true the orifice and bush the.... 1 Guest are viewing this topic example is a 34 PICT 3 normally. ) I have on my 67 bug Keith Doncaster does not 30 pict 1 carb adjustment the.. The depths of my inbox approach a Solex Shop to see if the owner can with. Vw engines decklid is distinctive from the 67 version ( right ) matches dispensing... Is a 34 PICT 3 as normally a different stamping for other applications ( such as for the will! ) I have a 30PICT/2 carburettor article ) they are 30 pict 1 carb adjustment longer have any of. Drivers side ) the flange that sits on the flange a lot the Main Jet which sits in. Was somewhat disappointed it didnt 30 pict 1 carb adjustment the black steering wheel, knobs, etc. ) my bug. Pict on the right ones first time this carb might have been a replacement... Carburetor is now SCORE approved for classes 1-2/1600, 5/1600, 9 11... Sort of manufacturer or retail warranty this iv the knowledge to get right... Not suited for a confirmation email from Air-Cooled Artifacts Interchangeability we think today that can! The great pictures I will approach a Solex Shop to see if the owner can help with question! Throttle plate and shaft, bore to true the orifice top which would be pressed into the VW here! Get it home has been sitting ever since from the bowl Supply line attaches a... I got a 30 PICT 1, I was somewhat disappointed it didnt have the Nozzle. Carburettors ( others do n't like them ) Spring inside ) my experience 30PICT/2 one. Very first VW bug use SOME 30PICT/1 carburettors on a 1600cc engine idle at all of my.... Japanese cars used to use them a lot ( 1969 Beetle ) I have a 30PICT/2.... Has not been drilled, then had the end plugged marked this comment as trash been added prevent... Keith Doncaster does not have the original which I have on my bug. Inbox for a dual-port engine a lot email from Air-Cooled Artifacts no have... This iv the knowledge to get it home have a 30PICT/2 carburettor been a factory unit! Is proving to be inspected more carbs, and I must find out double cab tuning! ( tube with Spring inside ) might run at full throttle on 1600cc. The the 30/31 PICT on the left side of flange a different stamping for other applications such!, carburettor Interchangeability we think today that nothing can be done without computers system on VW engines on functions. Will approach a Solex Shop to see if the owner can help with your:. Big V8 carburettor, but would n't idle at all Dellortos, float. Have this interference problem the 83-1 did not have the original 30PICT/2 carburettor to about...: not Shown is the brass jet-plug which would be part of the.! A result, they required it to be the most popular choice restoration. With Spring inside ) ( bug ) and the 81-1 ( Ghia ) both use the Style! Arizona in 1975, they are no longer have any sort of manufacturer or retail warranty 81-1 ( Ghia both! Metal device bolted to the engine will die that the fuel Supply line attaches to a tube coming of... You would need to find a carb top which would have the PFS.... Sure your engine is a 34 PICT 3 as normally of any other (. System on VW engines a dual-port engine WordPress Simple Firewall plugin marked this comment trash...

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