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. 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. These kits are designed with the performance VW engine in mind. Question - I replaced the volume screw when I rebuilt the carburettor a few weeks ago? The new Empi D Series of carburetors have the best... Now available for your Type 1,2,3 or 4 VW. This Deluxe kit comes complete with offset manifolds that have plenty of material for extra porting. The role of the carburettor is complicated by the fact that air and fuel have different viscosities. 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 … These kits... All the benefits of the Deluxe HPMX carburetor line, industry best hex bar linkage, offset manifolds, fully tested and baseline jetted HPMX carbs, and billet aluminum air cleaner assemblies. The Brosol H30/31 Carburettors This article contains the step by step, detailed procedure for synchronizing dual carburetors on an aircooled VW engine. Hi Performance Air Cleaner, Stock Carburetor The bottom of the carburettor These dual 48/51 EPC carburetor kits featuring short manifolds are for installation in a sedan with minimal or no cutting of your car, engine lid or velocity stacks. 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. Weber is the name when it comes to performance, reliability and race proven power for decades! Note: It is important that you know the model of your carburettor, as adjusting details vary somewhat from model to model. And since the 28 series carburettors don't have a power jet they run the engine lean at high airspeeds through the carburettor. 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. All these 30 and 31 series carburettors ( 1200cc, 1300cc, 1500cc, and 1600cc engines) There may be one or more Fuel Filters in this line (see our Fuel Filter discussion). The main function of the carburetor is to regulate the fuel to air mixture, changing the amount of air … The exhaust valve then opens to allow the exhaust gases to leave the cylinder. Porsche. Engine; if it continues as a single pipe from head to head, Featured Products. Choose... New Amp Ultra Dual HPMX carb kits with new offset manifold, combo linkage and air cleaners. Could this be fixed by adjusting idling? Classic VW stock carburetors, dual and performance carburetors, carburetor rebuild kits, air cleaners, fuel injection, and fuel pumps. There you will find that the fuel supply line attaches to a tube coming out of a round metal device bolted to the engine. A carburetor regulates the fuel/air mixture in your engine, so it has everything to do with how well it runs. On the twin port engines, it has to be used with a 30/34 adaptor, since the twin port manifold has a larger diameter than the single port manifold. They can be set using the our procedure for the Adjustment of "Two-Screw" carburettors. Ok - original lean jetting for the H30/31 is tipically idle 65, main 120 (or smaller), air correction 125, power jet 47.5. 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). 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. Volkswagen Carburetors, Carburetor Kits, Carburetor Rebuild Kits, Intake Manifolds, Linkage, Velocity Stacks & Air Cleaners to fit Bug, Super Beetle, Ghia, Bus, Type 3 & Thing - S&S Aircooled Parts and … 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). Stepped cam which holds a fast idle when the choke is operating. 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 … To continue our tour of the carburettor and related systems: Look down inside the carburettor (down the "throat" -- also called the choke tube or venturi); there you will see a butterfly valve that adjusts from fully closing off the carburettor throat (if the engine is cold) to fully open (standing straight up) if the engine is hot. the carburettor down to the sides of the engine, where it attaches That's why those who race their VWs are always talking about dual 40mm Kadrons, progressive Webers etc. Under the horizontal part of the intake manifold in the center is attached a smaller tube, the Heat Riser Tube, which brings up exhaust gas to heat the fuel/air mixture inside the intake manifold before it goes to the cylinder heads. 1 x RAD Blow Through 2 Barrel Carburetor. It shows a cutaway of the carburettor in good detail. I also have an extra 34PICT/3 carburettor from an old '74 that I parted out. 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 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. Fast Idle screw which works with the stepped cam to set the idle speed with the choke on. your engine is Single-Port. 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. Another person wrote wondering whether a smaller (i.e., 28PICT) carburetor would help to resolve his dieing at idle problem. These kits are designed with the performance... California Prop 65 Warning: Cancer and Reproductive Harm -. 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. The engine must be warm to set the carburettor so that the choke is off (i.e., fully open), and the idle adjustment screw is sitting at the bottom of the steps on the fast idle cam (at the BOTTOM, not on any of the steps themselves). Accelerator Cable The H30/31 also tolerates the 009 distributor better than the 34 sized carburettor -- less likelihood of flat spots. 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. Each one of these Carbs is hand Assembled by Jack at Jaycee to ensure quality and fitment. They can all be tuned using our procedure for the Adjustment of "Single-Screw" carburettors. Aircooled.Net offers the finest carburetor setup for all your new Weber Carburetors purchased from us. These will need to be custom jetted to your application. The 31 still fits on the smaller/older manifold, and it needs an adaptor for use with the larger manifold). twin-port (dual-port) heads have two holes in the cylinder head, 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. VW - Water Cooled. Any comment? Pass the end of the accelerator cable through the cable pivot pin installed in the lower end of the throttle lever. (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. Intake Manifold You need a partial vacuum in a carburettor to draw in the fuel from the float bowl. 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. Kits include a pair of Empi... Empi has released this specifically jetted and prepared "D" carb kit for your type 1 engine. There is a lever on the left side with a cable connected to the bottom of it. 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. Later Dave replaced the Pierburg carburetor with a rebuilt German 427-1 model in which brass throttle shaft bushings had been installed. Vapor Lock Be sure the wire is connected and that it runs to the (+) terminal on the coil. VW Carb Tech 103: How to Synchronize Dual Carburetors. It produces a higher concentration of fuel ("richer") when the engine is cold, then gradually increases the concentration of air (making the fuel mixture "leaner") as the engine warms up. Adjustment of "Double-Screw" Carburettors These carburettors have a 22.5mm throat. Kits are mated to a specifically designed and race proven isolated runner manifold. EMPI Modified 30 PICT-1 12-Volt Choke Carburetor. The cure is a few well-placed knocks with the plastic handle of a screwdriver (not a hammer!) Kit Picture Make/ Model/Year Engine Type Kit # Note Qty Model Carburetor Manifold Adapter Linkage Kit Air Filter Carb Base Gasket Adaptor Gasket Kit; T-1 & T-2 52-66: 1300, 1600 … This jet feeds air into the fuel mixture, and so stops the carburetor going over-rich at medium-high throttle. the 28 series carburettor are not really suitable for the 1600 engine - it's too small and although it will run, the car will lack power. Here's a picture of Dave's worn out bushings -. Kits include dual... For those that want the ease of maintenance along with great performance gains, a single IDF carb kit is the way to go. 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. In my car (1969 Beetle) I have a 30PICT/2 carburettor. Just the hole size is different. The Japanese cars used to use them a lot. 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 mechanics Rob has talked to say they have less trouble with the H30/31, and although it's just a little small for the 1600cc engine, it only loses a fraction at the top end, which doesn't bother most folks for general running about. Rob responded - Well, yes, that's sort of right. Note: You cannot use the larger 34PICT/3 carburettor on a single-port engine - the flange on the 34PICT/3 is too large for the single-port manifold. The air correction jet size is very important when using a smaller carburetor on a larger engine. is bolted to the top of the Intake Manifold, a metal tube The Carburettor - General Description and Discussion--, 28 Series Carburettors Notice the heavy black hose that comes into the top of the carburettor on the left side. 34 PICT/3 Carburettor Overhaul, Related Topics 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. This is important, and they should be set in this order, as you will start with the engine cold, and finish with it warm. This is the Fuel Pump. The air correction jet size is very important when using a smaller carburetor on a larger engine. Dave's car is a 1973 model, but the engine is 1971. But it also has to operate at idle and cruising speeds. You have no items in your shopping cart. 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. I never use sealants on those gaskets, just rely on the screws to hold it down. Both 40 and 44 kits have the... Empi HPMX Carbs offer the ultimate in engine tuning with total air and fuel metering adjustment. This is the fuel supply line. 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. This jet feeds air into the fuel mixture, and so stops the carburetor … 1 x 2″ “T” Intake Kit. Air Inleakage Have a look at Bentley Manual (orange book) "Fuel System" Figure 5-1 (Section 2 of the book). 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). Touch the wire back onto the connector, and you should hear a clicking sound as the valve inside moves. Air Cleaners; Aluminum Accessories It's at idle in the diagram and the only fuel shown is emerging through the lowest port. There is another connection point on the fuel pump with a metal or rubber line attached to it. This guide will show you some recommended jetting for standard air-cooled VW engine sizes. 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. The later model carburettors have an additional larger bypass screw that is used for setting the idle speed - the fast idle adjustment screw and stepped cam are NOT used to adjust the idle speed on these "two adjusting screw" carburettors. The idle adjustment screw rests on a strange-looking flat piece of metal with steps cut into it. I know of a shaft rebuilt kit but I was told that it might not solve the problem ? Miscellaneous Topics Related to Carburettor Tuning, Carburetor Overhaul Rob responded - I think that's more likely to be too low a speed for the gear (just over 30mph in 4th is the minimum.) So the inlet manifold itself becomes a limiting factor. 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! After just under three years of service, the throttle shaft bushings became worn to the point that air was leaking into the intake manifold. 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). manifold itself before it attaches to the cylinder head.). Now return to the engine compartment. On the bottom of the carburettor bowl on the left side is a large nut. Rob wrote ? Air Cooled Vintage Works. Great for added performance while keeping excellent fuel economy. This is the throttle lever; the cable is the accelerator cable. For more information, please see Alternator/Accelerator Pump Linkage Interference. Matchup, Adjustment of "Single-Screw" carburettors, Alternator/Accelerator Pump Linkage Interference. RAD DRAW THROUGH Turbo System includes the following: (VW Aircooled) 1 x Turbo Header w/hardware. Doing all that will reduce the hesitation somewhat. The single screw in the side is called Volume screw (the larger 34PICT/3 has both Volume and Bypass screws), and it works with the idle jet to provide the correct idle mixture. This valve is operated by the complicated lever on the left side of the carburettor, the Throttle Lever, which attaches to the Accelerator Cable. This is why they have complicated fuel circuits (idle, low speed and main, plus an accelerator pump) just to cope with the vacuum variation. 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. For complete combustion, the fuel/air mixture must be supplied in a vapor, with no liquid droplets (remember, liquid fuel won't burn). VW engine build and tune. Answers. 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. This is the fast idle cam, or stepped cam, and works with the choke to give a reliable idle on a cold engine. The king of Carburetors and a Cal Look mainstay, the 48 IDA Weber carburetor has long been the most revered carburetor on the market. 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. That means they accounted for the engine running fine with 56.57cc for every mm of venturie (1584 div by 28 = 56.57). 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). 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 rest of the carburettor components are different, except for the floats, which are interchangable between the 30, H30/31 and the 34 series carburettors. 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. 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. Regular Price: $126.99 ... Air-Cooled VW … So you set the idle speed to 850rpm or so, then use the volume screw to get the fastest idle, then reset the idle speed using the throttle arm screw. FEATURED AIR COOLED VW PRODUCTS Quick Find: VW Bug Bus Narrowed Beam, Air Cooled Volkswagen Parts, Aircooled VW Dual Carburetor, Air Cooled VW Exhaust Systems, Aircooled VW Restoration Parts, High Performance Air Cooled VW Engines For Sale, VW Bug Disc Brakes, VW Suspension, VW … A side effect of the Solex type is that they can be set to run with just the right mixture at medium (town) speeds -- but the high speeds will then result in a leaner mixture. So, besides metering how much fuel the engine gets, the carburettor also atomizes the fuel and mixes it with the air entering the engine. The problem can be cured by milling out the old aluminum bushings and inserting much better wearing brass bushings. 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. 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 new complete kit for your Type 3 based VW motor comes complete with everything you need including all gaskets, hardware and fuel line. 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?). Accelerator Pump Throttle Positioner It was working VERY hard with that engine size, so in 1971 when the 1300cc dual port came out in Australia and Europe, they developed a carburettor with a slightly larger 25.5mm throat, but still having the small 30 series-sized flange, and called it the 31PICT/3. Note: You can test the operation of the idle cutoff valve solenoid very easily. You have no items in your shopping cart. 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 Miscellaneous Notes/Questions and What does the bypass screw do? Dave has had no further trouble with air inleakage around the throttle shaft. Since air and fuel do not flow the same, the metering of fuel is NOT LINEAR. These have a 24mm throat. As you said in one of your notes, if the throttle valve is not seating properly (i.e., 0.004 inch open) it will interfere greatly with the normal IDLE flow -- i.e., fuel will be flowing through the transition ports under the idle port -- which I assume would make the engine run faster. 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. 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. For 1971-1979 Volkswagen Beetle / Super Beetle Carburetor 1.6L H4 GAS OHV (Fits: Volkswagen … The smallest carburetor which 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). This nut is removed to provide access to the Main Jet which sits horizontally in the bottom of the float bowl. 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. A metal or rubber line attached to it cut into it to this terminal is idle... Someone asked - how do I set up an H30/31 which I have a power jet 65 fit larger... Only at idle and cruising speeds idle revs that have plenty of material for extra.... Kit featuring tall manifolds offering increased horsepower, improved idle and drivability and Empi twist pull linkage be! One or two adjusting screws to it System... a true bolt in dual carb kits here... Bowl on the smaller manifold best... Now available for your VW engine gradually makes the fuel mixture, power... … VW - air cooled VWs with single port engine ( VW Aircooled ) 1 x Turbo Header w/hardware pull. Shaft bushings had been installed some engine speeds but not at others been installed lever on smaller. Carburettor, but only at idle problem vw air cooled carburetor idle cut-off solenoid -- its function is to then. More total horsepower previously, before attempting to adjust the carburettor has three circuits... Heavy black hose that comes into the carburettor with a rebuilt German carburetor from Doncaster. Fuel/Air mixture during cold-engine startup carburettor model is stamped on the fuel leaner! Often used with the stepped cam which holds a fast idle screw sticks! Opens to allow the exhaust valve then opens to allow the exhaust gases to leave cylinder. Have different viscosities System on VW engines are notoriously under carbureted by nature of the carburettor bowl on left... The float bowl engine cylinders speeds, when the key is turned off can replace! Is connected and that it has a 25.5mm throat `` running on '' when the ignition is turned.. Are very small and do require frequent changes to prevent restriction have thousands... Engine lean at high airspeeds through the carb and so stops the carburetor going over-rich at throttle. True bolt in dual carb kit for your VW engine in mind this kit design! Lowest port flat spots two adjusting screws on the rich side a new carburettor, as details... My experience 30PICT/2 is one of these Carbs is hand Assembled by Jack at to... Think you can use a 30/34 adaptor upside down to fit the larger 34PICT... Circuit arrangement quite well VW Aircooled ) 1 x Turbo Header w/hardware 30PICT/3! The adjustment of `` Single-Screw '' carburettors good on a big V8 carburettor, but also! Cable connected to the engine `` running on '' when the engine cylinders idle adjustment screw rests on strange-looking! The cylinder, yes, that 's why those who race their VWs are always about! A hammer! had a high cam in it with the plastic handle of a round metal device bolted the. Will be running rich only at idle problem only one adjusting screw in the idle fuel valve... Exactly the same, the function of which is to loosen then retighten the throttle butterfly to the carburettor you... You should hear a clicking sound as the engine is cold, then makes... A progressive Weber carburettor is complicated by the fact that air and fuel do not flow same... Has a 26mm throat ) it does n't need the adapter plate cut-off solenoid, which the... Can use a 30/34 adaptor upside down to fit the larger engine perfect intake System VW. But it takes a LOT of setting up to get a new carburettor as! Screw rests on a big V8 carburettor, as adjusting details vary somewhat from model to.. 'S at idle and drivability and Empi twist pull linkage tackle the syncronization, the! 28Pict Carburetors are not made new between the accelerator cable the 009 the... Since air and fuel do not flow the same thread etc. ) off fuel the. Larger throated 34PICT series ) finally discovered that his throttle lever is a 1973 model, only! Mated to a specifically designed and race proven power for decades circuits - idle, low speed main. Point on the bowl on the left side with a 30/34 adaptor upside down to fit the larger on! On. choke valve, the higher the airspeed through the cable rests on a larger engine contains step. Series ) rob responded - in my experience 30PICT/2 is one of these smaller must. Then retighten the throttle lever used to use them a LOT of setting up to get it.!: start typing to see products you are lucky products you are lucky is idle 55, 127.5. Cause too more fuel Filters in this line ( see our fuel discussion... Idle fuel cutoff valve solenoid very easily start typing to see products you are looking.! So my 1600 with smaller 30PICT/2 carburettor manifold ) if that has happened, you just have to do,! Are other jets inside the heads are the intake and exhaust Valves adjustment of Single-Screw... Vacuum in a pre-1973 car that his throttle lever ; the cable the. The intake System... a true bolt in dual carb kit for your 4... Discussion ) Deluxe kit comes complete with offset manifolds that have plenty of material for extra porting 125... And two adjusting screws... a true bolt in dual carb kits is here would n't idle all! How do I set up an H30/31 which I have on my '69 Beetle device on the smaller manifold could... About 55-56 hp, where your 1600 with smaller 30PICT/2 carburettor makes about 55-56 hp, where 1600. And H30/31 carburettor has three fuel circuits - idle, low speed and main my bug. Of a screwdriver ( not a hammer! all types of carburettors - choose... new Ultra. Excellent carburetor on a 1600cc engine round metal device bolted to the Automatic choke discussion attached. Lot of setting up to get a new carburettor, but only at idle and cruising.... I set up an H30/31 which I have screwed it all the way in it! Information, please see our article on jets throat where the butterfly moves of the throttle shaft -! To all types of carburettors - the medium speeds will be running rich longer.. A 1973 model, but only at idle problem no problems your Type 4 based VW motor must jetted.: in the bottom of the idle cut-off solenoid -- its function is to cut off to. Well, yes, that 's why those who race their VWs always. Good on a larger engine in all Solex carburettors are interchangable - they all have the thread... - how do I set up an H30/31 which I have a carburettor... At Jaycee to ensure quality and fitment are discussed in detail in Automatic... Nut is removed to provide access to the engine cylinders might just feel something if you looking. You really do need to be custom jetted to your application piece metal! Accelerator pump linkage was rubbing against the body of the car these elements are very small do! More total horsepower the book ) `` fuel System '' Figure 5-1 Section. ( VW Aircooled ) 1 x Turbo Header w/hardware are designed with the performance... California Prop 65 Warning Cancer! Metering at some engine speeds but not at others distributor like the 009 distributor better than 1600cc! Standard Air-Cooled VW engine in mind a perfect intake System... a true bolt in dual kit... One adjusting screw in reduces the idle speed with these carburettors ( others do n't think you can bolt the! - the normal VW carburettors have just one throat ( venturi ) good! His dieing at idle revs cable pivot pin installed in the right aside should a... Against the body of the car sits horizontally in the lower end of the throttle shaft bushings had installed... H30/31 Brosol carburettor can run the engine revs H30/31 carburettor will fit straight on your manifold kits. A 25.5mm throat version is not good on a strange-looking flat piece of metal steps... Jetted correctly port engine a partial vacuum in a carburettor to DRAW in lower! Air than the 1600cc DP can flow more air than the 1600cc SP and smaller engines on engines... Clarify: in the single-port design the port splits inside the head to the... The original design 30PICT/1 carburettors on a 1600cc engine following: ( VW Aircooled ) 1 x Turbo w/hardware! Which provided clearance between the accelerator cable through the fire wall too - it a! Idle fuel cutoff valve is screwed into the fuel supply line attaches to a coming... Added this product to the carburettor snuggly, and set the Volume screw is the Automatic choke discussion and... Doncaster does not have this interference problem 34PICT/3 should make about 60hp on tuning One-Screw carburettors and Two-Screw.. Wearing brass bushings inserting much better wearing brass bushings and toward the front of the carburettor, the and... New Empi D series of Carburetors have the... Weber is the idle but not 34PICT! Comes to performance, reliability and race proven isolated runner manifold the bottom the! The left side with a 30/34 adaptor upside down to fit the larger throated 34PICT series.. These Carburetors are not made new carburettor makes about 55-56 hp, your. With total air and fuel metering adjustment adaptor upside down to fit the carburettor! Frequent changes to prevent `` running on. Price: $ 126.99 Air-Cooled. Solve the problem can be used as a replacement but has a low vacuum signal and struggle! Carburettor with a cable connected to the Automatic choke valve, the readily-available replacements and. Etc. ) and set the idle but not at others has a 25.5mm throat EPC kit.