So it is often used with a non-vacuum distributor like the 009. The bottom of 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. $64.00. jay. Dave installed a Pierburg 34PICT/3 carburettor on his '73 Super Beetle, which provided clearance between the accelerator pump linkage and the alternator body. 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). Carburetor Repair Kit. Details regarding the automatic choke operation are given in our Automatic Choke discussion. This is the throttle lever; the cable is the accelerator cable. Now, we are retired and enjoy VWs as a hobby. Carburetor Adjusting Tool. The other problem that I have is that the car is hard to start when the engine is hot -- you have to push the gas pedal to the floor and hold it there a while before the car starts (with a little smoke from the exhaust). This is the idle fuel cutoff valve (solenoid). The 205 refers to the 205 at the end of the VW number on the distributor. LOL Besides, it is fun to know how these things work. So the same carburettor types were used on the same engine when used in a Type 2, although they were often jetted a little differently to cope with the increased weight of the Type 2 vehicle. manifold itself before it attaches to the cylinder head.). So the 34 copes with this by using 3 fuel circuits - idle, low speed and main. Interference, Carburettor/Distributor What this means is that you can have correct metering at some engine speeds but not at others. Or, if working by myself, I find that I can come very close by adjusting the cable as follows: With the idle screw against the very bottom of the stepped cam, pull the cable back finger-tight and snug down the screw to secure the cable. I know of a shaft rebuilt kit but I was told that it might not solve the problem ? The VW shops in Australia usually recommend the H30/31 for all engine sizes up to 1600cc (including the dual-port engine), both because the 34s are very expensive here -- almost $400 -- and because the H30/31 is easier to set up. each part has its own series of numbers 113. Find all the latest facts, figures and Volkswagen BEETLE specs based on year, make and model. 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. Rob responded - The carburettor metal is fairly soft and it wouldn't take much pressure on the screw to force the bottom of the hole larger, but you couldn?t see it with a flashlight down that tiny hole anyway. This is why they have complicated fuel circuits (idle, low speed and main, plus an accelerator pump) just to cope with the vacuum variation. You get good mileage when tooling about town, but floor it and the small engines got good performance by using high revs and that second throat. Rob wrote - The normal VW carburettors have just one throat (venturi). Someone wrote ? The problem can be cured by milling out the old aluminum bushings and inserting much better wearing brass bushings. The drilling in the Bowl’s bottom takes full advantage of raw gasoline. 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. Question - I replaced the volume screw when I rebuilt the carburettor a few weeks ago? the head to provide the fuel/air mix to each intake valve. The Carburettor - General Description and Discussion--, 28 Series Carburettors Interference And it might run at full throttle on a big V8 carburettor, but wouldn't idle at all. The air correction jet should be about size 125. Notice the heavy black hose that comes into the top of the carburettor on the left side. 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. In my opinion the 30PICT/2 is one of the most reliable carbs Solex ever made (some folks dont like them), and it matches the 1500/1600cc single-port engines very well. Carburetors were stamped by the manufacturer to designate their intended application. Even with the 3-fuel circuits in the 34PICT/3 (as compared to my 2-ciruit 30PICT/2) this is the case -- just not as pronounced as the "2 circuit" earlier types. This restores the bushings to original specifications, and the brass bushing will ensure that the shaft does not wear the bushings for a much, much longer time than the original bushings. Rob responded - Well, yes, that's sort of right. The 1970 US-only 1600cc has a B6 in front of the engine number, and was a single port engine used in bugs (68 and 69 saw the similar B5 series 1600 engines first - used in the bus/kombi). the carburettor down to the sides of the engine, where it attaches KIPA Carburetor For VW Beetles Super Beetles 1971-1979 Dual Port 1600cc Engine 12V Electric Choke 34 PICT-3 Volkswagen Bug Bus Thing Karmann Ghia Squareback Transporter, OEM # 113129031K 98-1289-B 4.4 out of 5 stars 45 I hope that one of these days we can reel you back into the 1967 Beetle Community. Question - I've been told that the throat on the 31 is smaller and that's good (I was told) because the air rushes in faster. A progressive Weber carburettor is a very good option but it takes a LOT of setting up to get it right. Replace the solenoid if necessary. I never use sealants on those gaskets, just rely on the screws to hold it down. And the fractional LEAN hesitation would be part of the cause too. I also have an extra 34PICT/3 carburettor from an old '74 that I parted out. Why the addition of the Power Fuel Supply to the 30 Pict-1 for 1967? The engine running without your foot on the accelerator pedal is called Idling. This was coupled with a removable arm which attached to the upper half of the Carburetor. All Rights Reserved. Any comment? There may not be a car as recognizable as the Volkswagen Beetle. Dan Lehman, Hi, Dan…I have a simple mind–I have to think things through so that I can understand. I don't quite understand what you are trying to achieve though ? your engine is Single-Port. They sit on the twin port manifold with a 30/34 adapter plate. Don't overtighten it though, it's got a fine brass thread and screws into the pot metal of the carburettor -- both relatively soft metals. Richard, 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'. The ’67 Beetle always has been our favorite year. VOLKSWAGEN > 1963 > BEETLE > 1.2L H4 > Fuel & Air > Carburetor. The correct idle speed is important with the 34PICT/3 carburetor, which is more complicated than the earlier types. 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). Everyone loved the new design. These carbs have a 22.5mm throat. I still can't explain why I have good idle and acceleration (could be smoother but...) when the volume screw does not work the way it should. jay. This nut is removed to provide access to the Main Jet which sits horizontally in the bottom of the float bowl. It shows a cutaway of the carburettor in good detail. 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. No one is going to die if the numbers don’t match–but, it IS a nice touch when they do! This jet feeds air into the fuel mixture, and so stops the carburetor going over-rich at medium-high throttle. which splits right and left and carries the fuel/air mixture from The ideal fuel/air mixture is called Stoichiometry. You’ve the gift of clarity. Part number: 113129031K Of course, maybe it's the other way around -- maybe the throttle valve is sticking open, which would make the throttle lever open, too. It had 1600 cylinders, with single port head and 30PICT/3 carburettor. The particular vehicle that I'll be using as a reference is a 1971 Volkswagen Beetle with a 1600cc engine. 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. Deluxe Beetles, which were imported directly from West Germany to Volkswagen Dealerships in the USA, came with the Solex 30 Pict-1 Carburetor. VOLKSWAGEN > 1969 > BEETLE > 1.5L H4 > Fuel & Air > Carburetor. So before I can even begin to tune the engine properly I've got to find and fix whatever's holding the throttle valve open. The Carburettor - General Description and Discussion, Adjustment of "Single-Screw" Carburettors, Adjustment of "Double-Screw" Carburettors, Miscellaneous Topics Related to Carburettor Tuning, 28 PICT-1 & -2; 30 PICT/1 Carburettor Overhaul, Alternator/Accelerator Pump Linkage For more information, please see Alternator/Accelerator Pump Linkage Interference. You and Mary take care–hope to talk again soon. Volkswagen Beetle 1969, Carburetor by DuraGo®. The air correction jet size is very important when using a smaller carburetor on a larger engine. But it also has to operate at idle and cruising speeds. This is the volume control screw, used for setting the idle mixture, and this type of carburettor can be called a "one adjusting screw" type of carburettor. jay, David Brown–my go-to guy for VW Parts information adds the following: The Throttle Return Spring change took place during the 1966 Model year. On the throttle lever (back at the carburettor) there is a return spring that returns the Throttle Lever Screw (also called a Fast Idle Screw) to rest on the Stepped Cam on the left side of the carburettor. The USA, came with the vw beetle carburetor identification 30 Pict-1 Carburetor can be used as a replacement but has slip... Clean up and partially restore your vintage VW Carburetor.Chris Vallone Carburetor fuel bowl and a hole can be upon. Made for 1967, the function of which is more complicated than the 34 copes with this using. They are important for the 1600cc engine run out of 5 stars 34 a 26mm throat it... 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