Compressing the coil spring more will make the pump start working sooner for a longer squirt. Also look and the sides of the throat where the butterfly moves. Probably not this causing the problem -- it should self align as the screws are tightened, but even a few thousandths out might cause it to stick, and this would also tell you if the screws are loose, which they should NOT be of course (probably two screws, and I think you get at them from underneath). VW engines are notoriously under carbureted by nature of the original design. For 1967, the 30 Pict-1 had a different Accelerator Lever, Return Spring and Spring Hanger. The rest of the carburettor components are different, except for the floats, which are interchangable between the 30, H30/31 and the 34 series carburettors. Question continued - I think I have figured out why when traveling in third or fourth at low rpms when I suddenly floor it, it jigs and shakes a bit, I figure I'm flooding the engine and it can't pick up at those speeds! The /2 of older carburettors has only one adjusting screw in the left side, and has only two internal fuel circuits. About the Carburetor on your VW Beetle Back in the 70s, before fancy computer-generated systems, fuel and air were delivered into the engine by carburetors. The VW Beetle engine originally used three different-sized Solex carburettors to suit different engine sizes, and each size has several variations, so let's look at them. Rob responded - In my experience 30PICT/2 is one of the most reliable Solex carburettors (others don't like them). AW 1975 If the car makes a habit of this, its time to rebuild the carburettor and replace the float needle valve, which is included in most carburettor overhaul kits. Accelerator Pump So my 1600 with smaller 30PICT/2 carburettor makes about 55-56 hp, where your 1600 with larger 34PICT/3 should make about 60hp. The H30/31 carburettor has a slightly larger throat than the 30PICT/2 you have at the moment. Last one. Price: Alternate: No parts for vehicles in selected markets. For complete combustion, the fuel/air mixture must be supplied in a vapor, with no liquid droplets (remember, liquid fuel won't burn). The larger the capacity, the higher the airspeed through the carb and so the leaner it will run. There is a lever on the left side with a cable connected to the bottom of it. Do not forget to read about Volkswagen BEETLE problems, recalls and complaints. Jets Answers. It takes three hands -- I use my channel lock pliers and hold the end of the cable to the throttle lever while I tighten the screw with the other hand. The idle jet should be a size 55, and power jet size 65. since the original oversized idle jet is normally a 65, you can use that to replace the undersized power jet. twin-port (dual-port) heads have two holes in the cylinder head, Stock VW Carburetors & Components. I don't think you can use a 30/34 adaptor upside down to fit the larger carburettor on the smaller manifold. Volkswagen Beetle 1969, Carburetor by DuraGo®. The H30/31 also tolerates the 009 distributor better than the 34 sized carburettor -- less likelihood of flat spots. There is no bypass screw on the 30PICT/2 carburettor. The cure is a few well-placed knocks with the plastic handle of a screwdriver (not a hammer!) In my car (1969 Beetle) I have a 30PICT/2 carburettor. I think the engine idles fast because the idle screw is turned almost all the way it, but the bypass screw is set such that if you turn it in any more to lower the idle the engine dies. The VW 45-1 Carburetor would have had the Power Fuel System Drillings with a dispensing nozzle of 0.75 and no check ball in the Power Fuel Drillings. Now, we are retired and enjoy VWs as a hobby. This jet feeds air into the fuel mixture, and so stops the carburetor going over-rich at medium-high throttle. 7 product ratings. These carbs have a 22.5mm throat. This is the Fuel Pump. The /4 designation means it's been set up as a lean running to control emissions -- more commonly found in California than in other parts of the world. This was coupled with a removable arm which attached to the upper half of the Carburetor. This site uses Akismet to reduce spam. The Carburettor - General Description and Discussion--, 28 Series Carburettors These have a 24mm throat. The original throttle shaft bushings are "garlock" split style bushings made of relatively soft aluminum, which wears after a short while and permits air to leak in around the throttle shaft, essentially making the carburetor useless. If your classic Volkswagen is underpowered and sluggish, a good replacement carburetor will give it a new lease on life. 2. The drilling in the Bowl’s bottom takes full advantage of raw gasoline. The ’67 Beetle always has been our favorite year. This stepped cam is moved by the automatic choke so that the screw on the throttle lever rests at lower and lower levels as the engine warms up. $159.38. Thank you for being a loyal Reader! If you do not hear a clicking sound, check to make sure there is power (12 volts) to the wire (small trouble light, voltmeter, etc.). The development of the 30/31 carburettors is interesting... the 30PICT series has a 24mm throat, and it's final development was the 30PICT/3 used in the 1970 1600 single-port engine (in the USA). These have a 24mm throat. The earlier version is not good on a 1600cc - it will run the engine very lean (hot) at higher speeds. If you follow the fuel line you will find that it runs forward into the center tunnel of the car and out at the front under the luggage area, where it attaches to the bottom of the Fuel Tank. It had 1600 cylinders, with single port head and 30PICT/3 carburettor. each part has its own series of numbers 113. The 30PICT/1 has a 24mm throat, fine for engine capacities up to 1500 but slightly restrictive for 1600; the H30/31 has a 25.5mm throat, which works well for 1500 and 1600 sizes but is a little oversized for the 1200/1300 engines; and the 34PICT/3 has 26mm throat, which works well for 1600 and slighty larger engine capacities (1641, 1679 and maybe 1776). Then, from the top edge of the lower half of the Carburetor, the casting was drilled downward to intersect with the angled drilling below. The 30PICT Carburetor can be used as a replacement but has a slip on fuel inlet and a 12 volt choke. This linkage is connected to the accelerator; when acceleration is required, the pump squirts a spray of fuel directly into the throat of the carburettor to momentarily increase the fuel/air mixture concentration. And since the 28 series carburettors don't have a power jet they run the engine lean at high airspeeds through the carburettor. The H30/31 also has a low vacuum signal and can struggle to pull in vacuum advance when used with the vacuum distributors. You and Mary take care–hope to talk again soon. The first of that series carburettor came with no power jet (it was designed for the 1300 engine), but the later versions have the power jet and this version is OK on a 1600cc engine. The 31PICT/3 is a direct replacement for the 30 series, with (I'm guessing) some slight enhancements, and since the number is larger (31 v 30), the throat size is a little larger too, but not as big as the 34. Although, I know that not everyone is as interested in such things. The air correction jet should be about size 125. With the throttle not seating properly on that side (cracked open more than the .004 it should be), it would interfere greatly with the normal idle flow in the drillings around the volume screw and idle cut off. Later Dave replaced the Pierburg carburetor with a rebuilt German 427-1 model in which brass throttle shaft bushings had been installed. No one is going to die if the numbers don’t match–but, it IS a nice touch when they do! A stock VW carburetor is proportionally small in relation to VW engine size when compared to most (if not all) other car makes. Volume screw which adjusts the idle mixture. The idle jet (on the right side - has the cut-off solenoid screwed into the back of it), has a set sized fuel jet (it should have a size of 55 stamped on the side of the head) and so the volume screw adjusts the volume of air added to the idle port to balance the fuel flow. On the side of the carburettor body is a barrel-shaped object, a little larger a pen-cell battery, with a black wire connected to the outer end. Initial identification of the 30 Pict-1 Carburetor can be seen on the driver’s side of the Carburetor Fuel Bowl. One thing though - the H30/31 carburettor is usually delivered with very lean jetting, and if you are using it on a 1300 or 1500 it may be OK, but if you have a 1600cc engine in your '67, then it will almost certainly run lean, and be difficult to tune. The carburetor is a Solex single barrel model. The following descriptions apply to all types of carburettors -. The complicated-looking contraption immediately below the air cleaner is the carburettor. These carburettors have a 22.5mm throat. This is the Automatic Choke valve, the function of which is to regulate the fuel/air mixture during cold-engine startup. The carburettor model is stamped on the bowl on the left side of the carburettor. Nothing looks quite like a Beetle, and nothing runs like one either. Some of the 30PICT carburettors (especially the 1970 30PICT/3 and the modern H30/31) were/are jetted super-lean for emissions reasons (I've seen the main jet as small as 112.5). manifold itself before it attaches to the cylinder head.). There were actually many VW distributors ending in 205 and they differ significantly. The 28PCI, 28 PICT, 28PICT/1, 30PICT/1, and 30PICT/2 all have one adjusting screw in the left side of the carburettor (the Volume screw) and an idle speed screw on the throttle arm. Rob noted - I've removed the carburettor top maybe ten times and still used the same carburettor top/body gasket with no problems. 1. Product Remark: Works with Air-cooled VW Type 1 with Dual Port manifold. And since higher airfow means a higher vacuum in the throat, this sucks in more fuel for a richer mixture, so you then have to enlarge the air correction jet to match the higher airflow. The books say that with the pedal fully depressed and the cable extended forward, the throttle lever should be wide open and attached to the cable such that there is about 1mm of clearance between the throttle lever and the carburettor. The main function of the carburetor is to regulate the fuel to air mixture, changing the amount of air combined with fuel as it enters the cylinders of the engine. Every buyer must check Volkswagen BEETLE car history before getting a car loan or credit. Automatic Choke Deluxe Beetles, which were imported directly from West Germany to Volkswagen Dealerships in the USA, came with the Solex 30 Pict-1 Carburetor. LOL Besides, it is fun to know how these things work. jay. I know of a shaft rebuilt kit but I was told that it might not solve the problem ? You might just feel something if you are lucky. jay. Pass the end of the accelerator cable through the cable pivot pin installed in the lower end of the throttle lever. But, even more than that, VW Engineers carefully plotted an engine for 1967 Beetles which included a larger displacement Engine (1500ccs) coupled with the 113-905-205K Distributor -VW 105-1 Carburetor pair for good, lasting performance. So the modern H30/31 is in fact really a copy of the 31PICT carburettor -- they have included the "30" in the model number (H30/31) to show that it replaces both the 30 and 31 series carburettors. (The H30/31 designation comes from the fact that this carburettor is a direct replacement for both the 30-series (with a 24mm throat) and the 31-series (25.5mm throat) used on the post-1971 1300s in Europe etc. the head to provide the fuel/air mix to each intake valve. 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