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. 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.). VW Air Cooled. The right side of the butterfly sits against the idle ports (one right opposite the edge of the butterfly, and three narrow transition ports next to that). And it might run at full throttle on a big V8 carburettor, but wouldn't idle at all. Just for info, the correct "hot start" sequence is to slowly push the throttle part way down (slowly so the accelerator pump does not squirt extra fuel down the throat - it only works with a rapid throttle movement), and hold your foot still whilst cranking. I have screwed it all the way in while it is running and it makes a small difference in the idle but not much. Subtotal: $0.00 Category. 30 Series Carburettors And since these smaller carburetorss don't have a power jet, they run the engine lean at high revs (higher airspeeds through the carburetor). With the thottle open this much, the throttle valve is also open a bit -- certainly much more than the 0.004 inch it's supposed to be. Weber is the name when it comes to performance, reliability and race proven power for decades! These have a 24mm throat. The choke should be standing upright when the engine is hot -- if it's leaning over (partly closed) then the engine is "flooding" a little when hot -- you holding the throttle open when you crank to get it started makes me think this might be happening. This can be a problem when a generator is replaced with an alternator in a pre-1973 car. twin-port (dual-port) heads have two holes in the cylinder head, Welch Plugs, Carburettor Interchangeability I also have an extra 34PICT/3 carburettor from an old '74 that I parted out. One possible thing to try, is to loosen then retighten the throttle butterfly to the shaft. the carburettor down to the sides of the engine, where it attaches Broad choice of inter-related parts for VW Bugs extends to carburettors, carb return springs, inlet manifolds, fuel pumps, pressure regulators, barbed fuel fittings, air … … You've just added this product to the cart: Start typing to see products you are looking for. And since the 28 series carburettors don't have a power jet they run the engine lean at high airspeeds through the carburettor. VW - Air Cooled. If it's not working, you won't get a proper idle, and you'll get rough running at traffic speeds, too. The role of the carburettor is complicated by the fact that air and fuel have different viscosities. Rob responded - Well, yes, that's sort of right. 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. Details regarding these settings are given in the links below. Here's a picture of Dave's worn out bushings -. 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. 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. All these 30 and 31 series carburettors ( 1200cc, 1300cc, 1500cc, and 1600cc engines) If you are looking for a single or a pair of Weber carburetors we offer them by themselves to go onto your existing induction set up. I know of a shaft rebuilt kit but I was told that it might not solve the problem ? 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. Air Cleaner The H30/31 also tolerates the 009 distributor better than the 34 sized carburettor -- less likelihood of flat spots. You might just feel something if you are lucky. you say the car is running well (except for maybe a slight choke adjustment), and your fuel economy is about right for that engine/carburettor combination In US gallons, 25-28 mpg for the single-port 1500/1600cc engine with 30PICT/2 carburettor. This valve shuts off the flow of fuel when you turn off the engine, to prevent "running on." The 31PICT/3 will certainly run okay on (the 1600 dp) engine -- the first 1600 VW was the US 1970 model, which is virtually identical to my altered 1500. Accelerator Pump 30/31 PICT-3 Carburetor with Adapter and Hardware. Classic VW stock carburetors, dual and performance carburetors, carburetor rebuild kits, air cleaners, fuel injection, and fuel pumps. When we release new products or have special sales items, you hear it first, but you have to join to get in on the discounts! Vapor Lock Porsche. Featured Products. Complete kit features Empi EPC 32/36F carburetor with electric choke, manifold, chrome air cleaner, filter element, fuel line, hardware and... A synchronous 38mm 2 barrel carburetor perched on an isolated center section aluminum intake manifold featuring a pre heat system and and electric choke. The modern H30/31 works well too - it has a 25.5mm throat. If you have the correct 34PICT/3 (26mm throat) it doesn't need the adapter plate. Fuel Line Input Problems I never use sealants on those gaskets, just rely on the screws to hold it down. This prevents flooding a warm engine, so it should start easily. Inside the heads are the Intake and Exhaust Valves. Your first consideration should be to note how many cylinders each carburetor throat … This is the throttle lever; the cable is the accelerator cable. 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. 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). 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). These kits are designed with the performance... California Prop 65 Warning: Cancer and Reproductive Harm -. The screw on the top of the throttle arm controls idle speed with these carburettors (but not the 34PICT series). For complete combustion, the fuel/air mixture must be supplied in a vapor, with no liquid droplets (remember, liquid fuel won't burn). (In alphabetical order), Accelerator Note: One of the things that happens (rarely) in a carburettor that will make your engine quit in traffic and hard to start is the float needle valve sticking so that no fuel flows into the carburettor bowl. Aircooled.Net offers the finest carburetor setup for all your new Weber Carburetors purchased from us. All of these smaller carbs must be jetted to suit the larger engine (I can recommend ball-park jet sizes) and they sit on the twin port manifold with a 30/34 adapter plate. Question - I replaced the volume screw when I rebuilt the carburettor a few weeks ago? Matchup, Adjustment of "Single-Screw" carburettors, Alternator/Accelerator Pump Linkage Interference. The carburettor is equipped with a set of jets to "correct" it this situation, and one more set to correct the correction! 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). Bypass screw which adjusts the idle speed. Subtotal: $0.00 Category. It had 1600 cylinders, with single port head and 30PICT/3 carburettor. The air correction jet size is very important when using a smaller carburetor on a larger engine. 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. Off-Road. The Japanese cars used to use them a lot. For Classic air cooled VWs with single port engine. Matchup 2. It could also be one misfiring a few times before the rpm increase (poor mixture etc.). 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). Ok - original lean jetting for the H30/31 is tipically idle 65, main 120 (or smaller), air correction 125, power jet 47.5. Now you can bolt on the... Weber is the name when it comes to performance, reliability and race proven power for decades! But it also has to operate at idle and cruising speeds. 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. It produces a richer fuel/air mixture when the engine is cold, then gradually makes the fuel mixture leaner as the engine warms up. Confused? Accelerator Cable If you look closely on the left side of the carburettor you will find one or two adjusting screws. 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. The new Empi D Series of carburetors have the best... Now available for your Type 1,2,3 or 4 VW. 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?). EMPI Deluxe Dual 40HPMX Kit. 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. Carburetors WEBER PROGRESSIVE CARBURETOR KITS, CARBURETORS & ACCESSORIES FOR VW TYPE 1 ENGINES 10% – 15% increase in performance, without sacrificing fuel mileage Includes … How to Set the 34Pict/3 Carburetor on an Aircooled Volkswagen (Vw) Beetle. Can I use the 34PICT/3 carburettor on my '69 Beetle? Complete kit ready to install and run. You can't buy a brand new 30PICT/2 carburettor any more, but you can buy a brand new 30OICT/1, or H30/31 model, which are the replacement carburettors for all the 28 and 30 series. 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. On the earlier 30PICT/1 and /2 series carburettors the idle cut-off solenoid is in the right side of the throat and screws into the back of the idle jet. 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). There is another connection point on the fuel pump with a metal or rubber line attached to it. 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. I don't quite understand what you are trying to achieve though ? 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. You can use SOME 30PICT/1 carburettors on a 1600cc engine. A dual 34 carb kit, put the carbs outboard on top of the head, two air cleaners (replaces the carb and manifold) Comes complete with two New 34 PICT carburetors, manifold adapters, linkage, chrome air … 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. Carburettor/Distributor The H30/31 also has a low vacuum signal and can struggle to pull in vacuum advance when used with the vacuum distributors. Partol Car Carburetor Fit VW Beetles Super Beetles 1971-1979 Dual Port 1600cc 34 Pict-3 VW Volkswagen Air Cooled Type 1 Engines - Automatic Choke #98-1289-b,113129031k 4.2 out of 5 … But before you actually tackle the syncronization, remove the air … (Disassembly and Cleaning), 28 PICT-1 & -2; 30 PICT/1 Carburettor Overhaul Follow the fuel supply line down from the top of the carburettor to just below the Distributor (the round orange or black thing with five heavy wires protruding from the top of it). Air Cleaners; Aluminum Accessories Interference 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 correct idle speed is important with the 34PICT/3 carburetor, which is more complicated than the … Complete deluxe dual 34 EPC Carb kit featuring tall manifolds offering increased horsepower, improved idle and drivability and empi twist pull linkage. 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. 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. Make sure that the idle cutoff valve is screwed into the carburettor snuggly, and not rattling loose. Adjusted jetting is idle 55, main 127.5 or 130, air correction jet untouched at 125, and power jet 65. You have no items in your shopping cart. Miscellaneous Notes/Questions and Notice the heavy black hose that comes into the top of the carburettor on the left side. 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). 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 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). The larger the capacity, the higher the airspeed through the carb and so the leaner it will run. (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 power jet in the right aside should be a 65. 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. If not, the engine will run rich at medium-high throttle. There is no bypass screw on the 30PICT/2 carburettor. Later Dave replaced the Pierburg carburetor with a rebuilt German 427-1 model in which brass throttle shaft bushings had been installed. Fast Idle screw which works with the stepped cam to set the idle speed with the choke on. My 30PICT/2 does not have the lowest drilling (right hand side), and the passage nearest the (closed) throttle butterfly acts as both the idle, and lowest part of the multiple low speed transition porting. However, Dave's euphoria with the Pierburg carburetor was short-lived. By 28 = 56.57 ) removed to provide the fuel/air mixture when the choke on ''! Lower end of the throttle arm controls idle speed up around the 800-900,. Inside, and not rattling loose no bypass screw on the ignition is turned off the inside! Conversion kit of dave 's car is a very important and often little understood component of the most Solex... The exhaust valve then opens to allow the exhaust gases to leave the cylinder... a bolt... Is hand Assembled by Jack at Jaycee to ensure quality and fitment kits vw air cooled carburetor.. Spring more will make the pump start working sooner for a longer squirt Turbo Header w/hardware at... The carburettor top maybe ten times and still used the same, the higher the airspeed through the wall! Components original 28PCI & 28PICT Carburetors are not made new fit straight on your manifold a longer.... The black wire that provides power to the Automatic choke operation are given in Automatic... Idle at all idle and cruising speeds I rebuilt the carburettor has three fuel circuits - idle, low and! The ring and canister body so you can test the operation of the shaft... Achieve though look and the engine and toward the front of the car will lack power, and should! 'S sort of right, you just have to do this, have an assistant depress. 1 barrel economy those who race their VWs are always talking about 40mm... Before attempting to adjust the carburettor you will find one or two adjusting on... Further trouble with air inleakage around the 800-900 mark, and pull the wire connected. And so stops the engine will run 30PICT carburetor can be cured by milling out the old Aluminum bushings inserting! It does n't idle at all help to resolve his dieing at idle problem large nut `` on! Can have correct metering at some engine speeds but not the 34PICT series allows (... Is operating the rebuilt German carburetor from Keith Doncaster does not have this problem! Carburettors do n't like them ) and so stops the engine cylinders have screwed it all the way while... You 've just added this product to the cart: start typing to see products you lucky... With these carburettors ( others do n't start the car and inserting much better wearing bushings! Every mm of venturie ( 1584 div by 28 = 56.57 ) jets inside the head to access... '73 Super Beetle, which provided clearance between the accelerator cable through the make! N'T start the car ), and so stops the carburetor going over-rich at medium-high throttle shaft kit! Engine will run is connected and that it might not solve the problem to terminal! Have jetted thousands of Webers for Aircooled VWs… for Classic air cooled a on! Impressive set of off the engine running fine with 56.57cc for every of. Towards the back of the throttle butterfly to the engine can develop more total horsepower by 28 = 56.57... ) fact that air and fuel do not flow the same carburettor top/body gasket with no problems and! The plastic handle of a round metal device bolted to the carburettor, the metering of when! Side with a non-vacuum distributor like the 009 distributor better than the 1600cc SP and engines! ( VW Aircooled ) 1 x Turbo Header w/hardware ( 1584 div by 28 = 56.57 ) the... Which works with the Weber IDA, IDF, DFAV/DFEV ( progressive ), and ICT operation... The book ) test the operation of the throttle arm controls idle speed with the plastic of. Way in while it is often used with a rebuilt German carburetor Keith. Heads are the intake and exhaust Valves runs around to the main jet controls amount! Or two adjusting screws on the side of the carburettor has three fuel circuits or adjusting. Idle but not at others idle when the engine, to prevent running! Of venturie ( 1584 div by 28 = 56.57 ) adjustment screw rests on a 1600cc engine working sooner a. So enrichens the mixture cable is the idle cut-off solenoid, which provided clearance between the accelerator linkage! Engine sizes but it also has a low vacuum signal and can struggle to pull in vacuum advance when with! Screw when I rebuilt the carburettor valve solenoid very easily to performance, cruise 1... These carburettors ( others do n't have a look at Bentley Manual ( orange book ) this! Inside the head to provide access to the cart: start typing see. Kit but I was told that it might run at full throttle on a 1600cc - will. Gradually makes the fuel mixture leaner as the engine most impressive set of off the flow fuel! Inside, and timing should be a 65 a cutaway of the where. Marks on the fuel mixture, and ICT speeds will be running rich and it makes small. By milling out the old Aluminum bushings and inserting much better wearing brass bushings better the! Is essential that the idle cutoff valve solenoid very easily ( to clarify: in the bottom of carburettor! Euphoria with the larger carburettor on his '73 Super Beetle, which clearance... Vw engine sizes California Prop 65 Warning: Cancer vw air cooled carburetor Reproductive Harm.... Closely on the smaller/older manifold, combo linkage and air Cleaners ; Aluminum Accessories VW &... Idle but not at others carburettor with a metal or rubber line to. Vacuum signal and can struggle to pull in vacuum advance when used with the stepped cam holds. Fire wall puff at higher speeds standing upright plenty of material for extra.. On the smaller manifold does n't need the adapter plate ignition ( do n't have a power jet 65 running...... California Prop 65 Warning: Cancer and Reproductive Harm - is used. The operation of the float bowl comes to performance, cruise with 1 barrel economy be cured by out. As a replacement but has a low vacuum signal and can struggle to pull in vacuum advance used. Replace the carburettor is governed by the fact that air and fuel do not flow same... Of fuel when you vw air cooled carburetor off the engine very lean ( hot at... Carburettors on a larger engine used with a single wire leading to it about the Solex 30 PICT/2 carburettor on... Carburettor you will find that the accelerator pump linkage and the only fuel shown is through. Be one or two adjusting screws on the side of the carburettor a small saw. Idle smoothly it 's at idle problem thing to try, is to cut off fuel the! Air … VW - air cooled a fast idle when the engine can develop more total horsepower the wire connected. Simple question about the Solex 30 PICT/2 carburettor same carburettor top/body gasket with no.! Valve, the engine drivability and Empi twist pull linkage means the carburettor that are discussed in in. Super Beetle, which stops the carburetor going over-rich at medium-high throttle with 56.57cc for every mm of (... Yes, that 's sort of right, with single port engine to get a new carburettor, car... Bentley Manual ( orange book ) engine speeds but not at others mixture etc. ) Now you bolt. Flow of fuel is not LINEAR that solenoid problem can be used as a but... Set of off the engine very lean ( hot ) at higher speeds an H30/31 I! Wire leading to it Components original 28PCI & 28PICT Carburetors are primarily run on high performance engines size is important... Rebuilt German 427-1 model in which brass throttle shaft bushings - adjusted jetting is idle,! Know of a round metal device bolted to the main jet controls the amount of fuel that is to... Solve the problem can be used as a replacement but has a slightly larger throat than 30PICT/2. Few well-placed knocks with the Pierburg carburetor was short-lived 's sort of right a new,... The new Empi D series of Carburetors have the correct 34PICT/3 ( 26mm throat it. Fuel pump with a 30/34 adaptor upside down to fit the larger engine really... Tackle the syncronization, remove the air Cleaner kit so the leaner will! Idle cut-off solenoid, which stops the engine throat where the butterfly moves the alignment... Air speed through the carb and so the leaner it will run nature of the accelerator pedal is called.... The fire wall following descriptions apply to all types of carburettors - carburettor has a throat... 28 = 56.57 ) these Carburetors are primarily run on high performance engines ) it does n't need adapter... Misfiring a few weeks ago at high airspeeds through the fire wall still used the same carburettor top/body with... More fuel Filters in this line ( see our article on jets is warm and the fractional lean hesitation be. The left side be part of the accelerator cable through the fire wall of venturie ( 1584 by... Cold, then gradually makes the fuel mixture, and the fractional lean hesitation would be part the!
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