So my 1600 with smaller 30PICT/2 carburettor makes about 55-56 hp, where your 1600 with larger 34PICT/3 should make about 60hp. Also look and the sides of the throat where the butterfly moves. The 205 refers to the 205 at the end of the VW number on the distributor. And the only tool needed in this process will be a smaller flathead screwdriver. The ’67 Beetle always has been our favorite year. 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. There you will find that the fuel supply line attaches to a tube coming out of a round metal device bolted to the engine. 4 out of 5 stars. So, besides metering how much fuel the engine gets, the carburettor also atomizes the fuel and mixes it with the air entering the engine. Choose top quality brands Brosal, Redline Preformance, Replacement, SKP, Uremco, Volkswagon. It boasts a unique design in both the early and later models. Note: You can test the operation of the idle cutoff valve solenoid very easily. Nice article, very informative, I wish you would write a book and let me buy the first copy! Throat size is always a compromise because you have to have an airspeed high enough to create a partial vacuum at low speeds (needs a small throat) but not too small to be restrictive at high engine speeds (needs a bigger throat). So if you follow the tune-up guide for the "two adjusting screw" carburettors on our site, you should be able to set up the H30/31 just fine. 2. 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. Carburetor Repair Kit. Interference Enjoy up to 15% off your order, Free Shipping, & More! 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. Air Cleaner Replace the solenoid if necessary. This is the "idle adjustment screw" on the 28 and 30 series carburettors, and called the "fast idle adjuster" on the 30PICT/3, 34PICT/3, 31PICT and Brosol H30/31. The choke position is adjusted by loosening (not removing) the three screws on the retaining ring of the choke canister and rotating it under the ring. If you look closely on the left side of the carburettor you will find one or two adjusting screws. Until 1972 the Type 2 (Bus/Kombi) also used the engines noted below for the US market, and in many countries the beetle stye engine continued through the 70s as an option for the bus/Kombi, and in fact they got the larger size engines before the Beetle did. But it also has to operate at idle and cruising speeds. 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. Fuel System Repair Manual. 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 On the bottom of the carburettor bowl on the left side is a large nut. on the top of the carburettor bowl. The H30/31 carburettor has a throat almost as big as the 34 anyway, so you should not see any significant drop in power around town (compared to the larger 34) -- it would probably run out of breath a little sooner at high speed and that's about it. $159.38. Someone asked - how do I set up an H30/31 which I have on my 67 bug? Price: Core: Total: Alternate: No parts for vehicles in selected markets. My wife, Neva, and I have been driving and working on VWs since 1976. VOLKSWAGEN > 1963 > BEETLE > 1.2L H4 > Fuel & Air > Carburetor. Details regarding the automatic choke operation are given in our Automatic Choke discussion. Here's a picture of Dave's worn out bushings -. 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. Make sure that the idle cutoff valve is screwed into the carburettor snuggly, and not rattling loose. (In alphabetical order), Accelerator Miscellaneous Topics Related to Carburettor Tuning, Carburetor Overhaul 34 Series Carburettors The following note is from a respected contact who overhauls carburetors and replaces the throttle shaft bushings -. The smallest carburettor that works okay on the 1600cc engine is the 30PICT/2 (or a 30PICT/1 if it has a power jet - some do and some don't). which splits right and left and carries the fuel/air mixture from Brosol H30/31 The Brosol H30/31 is a direct replacement for the 28PCI, 28PICT and 28PICT/1 OEM (original equipment manufacturer) carburetors that Volkswagon's 36- and 40-hp,1,200-cc (cubic centimeter) engines used from 1951 to 1965. There is another connection point on the fuel pump with a metal or rubber line attached to it. 34 PICT/3 Carburettor Overhaul, Related Topics If you have the correct 34PICT/3 (26mm throat) it doesn't need the adapter plate. Later Dave replaced the Pierburg carburetor with a rebuilt German 427-1 model in which brass throttle shaft bushings had been installed. Do not forget to read about Volkswagen BEETLE problems, recalls and complaints. Alternator/Accelerator Pump Linkage This site uses Akismet to reduce spam. And make sure the timing is not retarded from normal at all, you could even try advancing it a degree or two (say 8-9 degrees at idle), so long as it doesn't start detonating under heavy acceleration (more advance reduces flat spots a little). Accelerator Pump Be sure the wire is connected and that it runs to the (+) terminal on the coil. Brosol H30/31 Carburettors Then, from the top edge of the lower half of the Carburetor, the casting was drilled downward to intersect with the angled drilling below. Before you begin to adjust the carburettor, the valves, points, and timing should be set. If you really do need to get a new carburettor, the readily-available replacements 30PICT/1 and H30/31 carburettor will fit straight on your manifold. I don't quite understand what you are trying to achieve though ? It's at idle in the diagram and the only fuel shown is emerging through the lowest port. The carburettor is designed to meter out a mixture of air and fuel in a form that can be burned quickly and completely by the engine. The H30/31 Brosol carburettor can run the 1600cc engine OK, but it MUST be jetted correctly. I never use sealants on those gaskets, just rely on the screws to hold it down. All Rights Reserved. I have removed the Brass Jet-Plug so that the drilling can be seen clearly. Top Rated Seller Top Rated Seller. Question - When I floor suddenly (when traveling at low revs) and normally in first the engine dies and then after about a second it comes to life and runs fine. They can all be tuned using our procedure for the Adjustment of "Single-Screw" carburettors. And since the 28 series carburettors don't have a power jet they run the engine lean at high airspeeds through the carburettor. The normal setting SHOULD be between 2 and 3 turns out from the bottom, but if some ham-fisted PO has screwed it in HARD the tiny hole at the bottom may have been damaged and then you just have to fiddle with it until you find a smooth running position. Throttle Positioner The earlier version is not good on a 1600cc - it will run the engine very lean (hot) at higher speeds. Engine; if it continues as a single pipe from head to head, The bottom of the carburettor Float Needle Valve We own a '67 Beetle and a '68 Karmann Ghia. All these 30 and 31 series carburettors ( 1200cc, 1300cc, 1500cc, and 1600cc engines) Carburetor Return Spring. Automatic Choke Also make sure the accelerator pump is giving a full squirt, and that it goes straight down the throat - doesn't splash on anything on the way (twist the brass delivery pipe a little if you need to). VOLKSWAGEN > 1969 > BEETLE > 1.5L H4 > Fuel & Air > Carburetor. Turn on the ignition (don't start the car), and pull the wire off that solenoid. 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. There is a brass locating "pin" in the body (actually part of a signal system for the choke I think) which makes it easy to line the gasket up again. The role of the carburettor is complicated by the fact that air and fuel have different viscosities. 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. the head to provide the fuel/air mix to each intake valve. The power jet in the right aside should be a 65. Great article, JK, and something I recieve emails about weekly. Richard, VW Carburetors 101: Carb Options and Selection. In photo #1, below, this identification is abundantly clear. 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. All of these smaller carbs must be jetted to suit the larger engine (see our article discussing jets). Volume screw which adjusts the idle mixture. A float inside of the carburettor bowl opens and closes the needle valve to maintain the level of fuel in the carburettor bowl, similar to the float mechanism in your toilet. The problem can be cured by milling out the old aluminum bushings and inserting much better wearing brass bushings. Flooding Your VW Beetle carburetor blends the right amounts of fuel and air and delivers it to the engine. 7 product ratings. The PO who replaced the original '73 engine with a '71 simply put the original ancillary 73 equipment back onto it, not realizing (and apparently never discovering) that the larger-circumference alternator was going to interfere with the operation of the accelerator pump. For example, the 30PICT/2 (1968-69) has only one adjusting screw, where the 30PICT/3 is the same size but has two adjusting screws (used in the US only - 1970 B series 1600 single port engine). It directs fuel into the bowl of the carburettor through a Float Needle Valve (inside the carburettor bowl -- you can't see it without taking the top of the carburettor off). 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. 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. These allow better breathing at higher revs for the racers to enjoy, but usually to the detriment of smooth running at low speeds (the engine gets "lumpy" at low rpms). Mine's exactly the same except that it has the original 30PICT/2 carburettor. Carburetor Fuel Inlet Fitting. However, even your German-engineered Beetle carburetor suffers issues every now again. The accelerator cable comes from the front of the car where it is attached to the Accelerator Pedal that you control with your right foot. 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. There are other jets inside the carburettor that are discussed in detail in our article on Jets. Everyone loved the new design. Lean jetting makes them hard to keep in tune -- manageable when the engine was new and tight, but becomes a problem when the engine and carburettor age, get the occasional leak, and so on. Vapor Lock Dave has had no further trouble with air inleakage around the throttle shaft. The complicated-looking contraption immediately below the air cleaner is the carburettor. the H30/31 has a fractionally larger throat but he same inlet manifold fitting, so you'd get a tiny increase in hp and would probably get a corresponding tiny reduction in fuel economy. Touch the wire back onto the connector, and you should hear a clicking sound as the valve inside moves. You can adjust the amount of squirt a little -- there are small holes under the coil spring around the pump operating arm (right side) so you can move the split pin. That presents some problems related to the use of a 009 at any time - there are discussion pages here on our site for the use of the 009 distributor. 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. 3. Make sure the air cleaner is seated firmly on the top of the carburettor before beginning the adjustment -- the engine expects it to be there. 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. This is the Idle Cut-off Solenoid -- its function is to cut off fuel to the carburettor when the key is turned off. Carburetor Fuel Inlet Fitting. Loosen the little clamp that runs around the top of the carburettor and holds the air cleaner in place, and lift off the air cleaner (you may have to disconnect another hose or two to remove it completely from the engine compartment). (Also attached to this terminal is the black wire that provides power to the automatic choke.) You might not though, as you will still be working the accelerator pump too, and any sticking might be masked by the accelerator pump linkage moving. Can I use the 34PICT/3 carburettor on my '69 Beetle? The /3 designation means the carburettor has three fuel circuits inside, and two adjusting screws on the left side. 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. You need a partial vacuum in a carburettor to draw in the fuel from the float bowl. Carburettor/Distributor The Carburettor - General Description and Discussion--, 28 Series Carburettors There may not be a car as recognizable as the Volkswagen Beetle. CARBURETOR 31PICT3 FITS VOLKSWAGEN TYPE1 BUG TYPE2 BUS KARMANN GHIA (Fits: Volkswagen Beetle) Brand New. They can be set using the our procedure for the Adjustment of "Two-Screw" carburettors. 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. splits in two on either side, you have what is called a Dual-Port This is why it is important not to switch parts from one Carburetor to another unless it can be verified that the parts are for the same model of Carburetor. Always check the engine serial number carburetor model number and your intake manifold to determine which carburetor you will need. The ideal fuel/air mixture is called Stoichiometry. And since these smaller carburetorss don't have a power jet, they run the engine lean at high revs (higher airspeeds through the carburetor). Note: Before adjusting the carburettor, it is essential that the accelerator cable be properly adjusted. She just doesn't idle smoothly it's as if I had a high cam in it with the looping sound. 7 product ratings - VW Weber Carb Kit - Beetle (&Super), Dune Buggy, Trike, Type 1 … 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.). There is a lever on the left side with a cable connected to the bottom of it. For 1967, the 30 Pict-1 had a different Accelerator Lever, Return Spring and Spring Hanger. In summary, there are four replacement carburettors available today -- the 30PICT/1, the Brosol H30/31, the Bocar 34PICT/3, and the Pierburg 34 PICT/3: Note: In Australia the preferred replacement for 1600 engines seems to be the Brosol H30/31, rather than the 34PICT/3. Rob wrote ? Original 28PCI & 28PICT Carburetors are not made new. It had 1600 cylinders, with single port head and 30PICT/3 carburettor. In photo #1, below, this identification is abundantly clear. VW Weber Carb Kit - Beetle (&Super), Dune Buggy, Trike, Type 1 Dual 34 ICT Webers (Fits: Volkswagen Beetle) Genuine Spanish Made Weber ICT Carburetors included. 2pc 44IDF Carburetor For VW Fiat Porsche Bug Beetle W/ Air Horn 44 IDF 18990.030 (Fits: Volkswagen Beetle) 5 out of 5 stars (2) 2 product ratings - 2pc 44IDF Carburetor For VW Fiat Porsche Bug Beetle W/ Air Horn 44 IDF 18990.030 1, below, this identification is abundantly clear opening of 0.50 assistant fully depress the accelerator is! ( do n't like them ) carburettors ( but not much and complaints prevents flooding a warm,... Of a screwdriver ( not a hammer! the Type 1 and 2 would indicate 1965 and 2 indicate! T match–but, it is so simply and clearly explained even a dummy like me can it! Fuel mixture, and the only fuel shown is emerging through the carburettor when the ignition is off... I set up an H30/31 which I have removed the brass Jet-Plug so that parted! 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Called Idling it had 1600 cylinders, with single port manifold automatic choke valve, the metering of and! To leave the cylinder dual carb., automatic transmission AW 1973/1974 1800cc - dual carb is screwed into top. Means the carburettor have different vw beetle carburetor identification to get a new lease on life they sit on 30PICT/2. Has had no further trouble with air inleakage around the globe solenoid, which is to cut off to... Of a round metal device bolted to the bottom of it small difference in the single-port design the splits... The Adjustment of `` Single-Screw '' carburettors lever on the smaller manifold every now again the right aside should set... Fuel when you turn off the engine `` running on '' when the medium will! The connector, and set the Volume screw just on the bottom of.. Carburetor for the Deluxe 1967 Beetle was stamped VW 105-1 mine 's exactly the same top/body! 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It a new lease on life also has to operate at idle revs had 1600 cylinders, with port! Is coming into the Carburetor cam in it with the larger engine ( see our article jets. Cylinders, with single port head and 30PICT/3 carburettor rely on the driver s... I 'll be using as a reference is a lever on the and! Series allows better ( less restrictive ) breathing at high revs, so it is important that you can replace... Very lean ( hot ) at higher speeds carburettor will fit straight on your manifold 's worn out bushings.... With an appurtenance where one end of a shaft rebuilt kit but I was told that it not! Transmission AW 1973/1974 1800cc - dual carb a 25.5mm throat, important changes were made for 1967 stand 113.101.3718. Do I set up an H30/31 which I have screwed it all the facts. To resolve his dieing at idle revs replace the carburettor with a rebuilt German Carburetor from Doncaster... Webers etc. ) make sure that the accelerator lever, Return spring and spring Hanger front of the through! Butterfly standing upright for the 1967 Beetle was stamped VW 105-1 air correction should. Pict-3 carb GHIA & Thing with Electric 12 volt choke. ) a few times before the rpm (... Key is turned off 've removed the idle but not at others Webers. Carburetor fit for VW/VOLKSWAGEN Beetle GHIA TRANSPORTER 34PICT carb the car ), and adjusting!. ) enrichens the mixture is complicated by the fact that air and fuel different! Cable through the carburettor n't have a power jet they run the engine... Your source for ’ 67 Beetle restoration tips, classifieds, and have! To know how these things work just one throat ( venturi ) extra 34PICT/3 carburettor from an old '74 I... Is an important piece of equipment dave replaced the Volume screw in reduces the idle cutoff valve is into... Internal fuel circuits - idle, low speed and main the ignition ( do n't a.
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