34 pict 3 idle jet size

Note: Dave found that NONE of the several top-to-body gaskets provided in the kit was the right size or configuration for his carburetor (he was possibly sent a kit for the earlier series carburettors). If you try removing the idle shut-off valve and the air correction jet (the brass bolt head in between the float bowl and the main throat) and the idle jet itself, and then blast air through the passages in both directions, that might get it. PRODUCT AVAILABILITY can vary and short-term backorders are common. vegas The VW 105-1 Air Correction Jet would be 125z. There is a Mexican Solex 30 Pict-1 replacement Carburetor. Brosol/Solex Idle Jets .40. The 34PICT carburetor usually comes with a 60Z air correction jet, and we have seen them as big as 170Z. I have main jets: X117.5 and X127.5 and as far as I remember currently in the carburetor is a X125. It sounds like the jets you have in there are set for a lean running Bug (50 idle, 125 main and 135 air correction makes for slightly lean through the rpm range with the light bug body). Main jet sizes run through a range from X110 to X150 (1.1 - 1.5mm diameter). This means that the main jet is sized to the engine capacity, rather than the carburetor size, and X127.5 is the more common size for the 1600cc engine, rather than say the X125. It's a problem VW recognized very early on (since the aircooled engine has very hot heads and hot-spots were therefore more likely than in water cooled cars), so the fix was to add the cut-off solenoid to the carburetors. Jetting With the Centrifugal-Advance (009) Distributor, Tuning the 009 Distributor/ Dave uses his small needle-nose vise grip to hold the end of the cable to the throttle lever while tightening the screw with his other hand). This carb is designed to remain compatible with SVDA distributors, and fits the stock air filter. In most cases we are able to honor advertised price, but in the RARE case a substantial price increase occurs, you would be notified and given the option to cancel. But after November 15th, all still pending backordered unshipped items will be automatically CANCELLED **(except for any special ordered drop-shipped or made/machined-to-order items). Sorry! When you work out the area of the hole in each jet, the steps are roughly 2% increase in fuel flow for each size up (X125 to X127.5 for example). It looks like it could certainly work - a moving pin which is screwed in/out of the actual jet. Email care allows us to provide important service detail that can be later referenced by both the customer and our care staff. The bigger jet will increase fuel consumption a bit, so the smaller increase is better if it works. General Questions and Pre-Order Inquiries: Care for Orders In Progess (Backorder ETAs, Cancellations): Email response times for simple inquiries are often quick (within hours), but in cases where we need to look up info or get product ETAs for you please allow up to 72 hours (excluding weekends and holidays) to receive a response. Now unscrew it exactly 2-1/2 turns. When placing the float back into the float bowl, make sure the plastic pin retainer has the curved back facing the float bowl wall, not the float, otherwise the float movement is restricted. The air correction jet prevents the mixture going over-rich at high rpm (again, smaller numbers means richer for this jet). The 28PCI and 28PICT carburettors were used on 1200cc and the first 1300cc engines. Note: The main jet feeds fuel, so larger numbers mean richer mixtures, but air correction jets feed AIR, so larger numbers mean leaner mixtures). Hey, use the stock jet size, which is 125 for the 34 PICT-3. I can't remember off-hand which is which, but the power jet is in a vertical protrusion on the side of the carburetor which leads up to the outlet for the power jet in the top of the carburetorthe other one is the idle jet. Idle jet sizes of 70 or so will "run" on anything, but they don't run WELL (unless fouled plugs or 12mpg are your idea of "well"). Solex 30 PICT-3, 34 PICT-3 and 34 PICT-4, remove the air bypass screw. This gasket sets the fuel height in the float bowl; erratic behavior may result if the gasket is not correct. The valve on the Pierburg carburetor has a spring-loaded ball bearing on the end; it is likely that the valve in your kit does not. Lastly, you have emulsion tubes to change "where" it's rich, lean, etc. Make sure the old one you took out stays in good shape so it can be reused. The use of VW, Volkswagen and any model names and numbers is for the sole purpose of description of parts application. Discussion in 'Mech Tech' started by low_light_craig, Jun 9, 2017. to the back of the engine, in an angle) is a: g f 50 and the other: g f 50. Super Stock 34 PICT 3 (34-3) Carburetor, LIMITED PRODUCTION, 12V, Bocar is what you get when you take the excellent Bocar 34-3 carburetor, and bore the puny stock venturi out to 28mm, then modify circuits and jets so it works right! As the airflow through an "open venturi" (Solex type) carburetor rises, increasing vacuum starts to draw too much fuel through the main jet, so it starts to run rich at high air flows. Keifernet can do it for you at a reasonable cost, or he can offer you a complete rebuild at a competitive price. This carburetor will NOT work well with cams with over 270 duration, (same as the stock 34-3 carb). Idle jets are available in small increments. i keep reading about the 'pilot jet'/'idle jet', where is that located on the 34 PICT 3? Using a new gasket, install the carburetor on the intake manifold flange. IDLE JET .55 .65 .60 (d) VENTURII 40mm . Some tests to help you determine proper jetting. If the jets are screw in to tight that will cause high idle. Make your product selections based on the PRODUCT DESCRIPTION and OPTION INFORMATION presented in the detailed product listing. nomenclature and part number (referring to the exploded view). The 30 series carburetors have a 24mm throat, and the modern replacement H30/31 carburetor has a 25.5mm throat. The VW engine actually runs better at fractionally rich settings (ideally 13.8:1 rather than 14.5:1 according to Bob Hoover). Use stock vacuum line from air-intake #4 for CDI control unit. If you have a 009 (centrifugal advance) distributor, you may find that the spark plugs still seem a little dry/burnt looking at medium speeds , or the car lacks acceleration in the mid ranges. Use a steady throttle - minimum acceleration. The last three carburetors are more sensitive, and so the lack of vacuum advance on the 009 makes more of an impact. As a result, we have had to change our BACKORDER FULFILLMENT PROCEDURES. I would stick with the 34 pict 3 carb with the dual port. The /4 version was used in California and had additional features to reduce emissions. Which one is which one? As indicated previously, the VW engine actually runs better at fractionally rich settings (ideally 13.8:1 rather than 14.5:1 according to Bob Hoover who did lots of testing), but they are usually jetted a little leaner than that, so the X127.5 is really a minimum jetting for the 1600cc engine. Carburetor Cleaning The air correction jet starts leaning the mixture to bring it back into balance, but as the rpms (airflow) rises to near the maximum for that carburettor, the air correction jet works too well, running the engine lean. There are a few fuels which have up to 85% ethanol in them (E85). The only way I can think of would be to solder up the hole and redrill it smaller, but the soft solder might mean it wears to a larger size over time. . Air correction jets are harder to find. As these plates restrict air flow, there is less vacuum to . All suggestions here are just that - suggestions. Setting the idle screws (B): Tighten the screw until it touches the carburetor lever. "Leaving it alone" is fine for a new carburettor but silly when the engines are all at least 30 years old and in different states of health. If it is any lower the choke may be staying on too long, or it may be stuck on and won't open at all. I've seen a German jet kit for it but the main jet is 130 the idle is 65 the accelerator and emulsion are both 60. Note: Do not soak the choke heating element, pump diaphragm, float, vacuum diaphragm, or any other rubber or plastic parts in carburetor solvent. 2. If your car is having a problem with spitting/sputtering/cracking, this is an indication of the fuel/air mixture being too LEAN. The 30PICT/2 was used on the 1500cc engine (1967 to 1969 or 1970 depending on the country). *** Supply-chain disruptions have hampered our ability to acquire/restock items reliably, and a lack of backorder ETA information is the frustrating "new normal" for our hobby. See our Accelerator Cable Adjustment Procedure. Remove the main jet (as above) and blow through it (check for crud in the float bowl at the same time). Another question - The car runs terrible but it runs. Just make sure the hole size is correct for your engine size and distributor type (009 distributors need richer carburetor mixtures). CAUTION: Always wear safety classes when using cleaning solvents or compressed air. All information should be verified prior to use. When using the 30PICT or H30/31 carburetor on a twin port manifold and any vacuum distributor, change the jets to X125 or X127.5 main, 55 idle, and leave the air correction at 125Z. Choke vacuum diaphragm (38) If that's the case you need to make sure the idle cut-off solenoid is working (a nice click when you touch the wire on the connector) and that the idle jet (which it screws into) is not blocked. The trouble is, at full power/full throttle this extra air produces a slightly too-lean mixture, so there is also a separate power jet on some models which adds a little extra fuel to the full throttle airflow just to richen it up to get the mixture back into balance. CAUTION: included complete disassembly, several day soak (all metal bits and carb. The 205L number is a Bosch number, the other one is a VW number. Note: The manuals say that you should not remove the volume control screw, as it is set at the factory. That terminal on the coil is just a convenient place to obtain power to these components. Reply to Phatman. to start at sea level. We can only give a guide here, as engine age, type of fuel, carburetor wear, etc. Replacing the main jet in is super easy -- just put it in the hole in the side of the carburetor, then put the screw driver in after it and slide it along the 'valley' that runs across the bottom of the float bowl. The back one (pilot?) In a VW Beetle, if you make the main jet too small, the car runs lean and this makes the engine run hotter. PRODUCT IMAGES are representative only. Float needle valve and gasket (4 & 5) (See note below.) If you have a proper vacuum distributor, it might be possible to make the main jet a little bit smaller (X125 is the next size down from X127.5), but this will not make very much difference in the fuel consumption. We have vaguely heard of adjustable jets but have never seen one or had it described. With lean jetting you are likely to need more throttle and have slightly worse fuel economy - using the slightly richer settings I'd suggested above will give you a little more power and a cooler running engine, so hopefully fuel economy will improve a little, but don't expect too much - fuel economy with the heavy Type 2 body is never very good. Once all together, retune the carbs (mixture and idle speeds) as per standard VW tuning methods. Look down into the top of the carburetor to make sure that the screwdriver is squarely in the slot in the jet and that the threads line up squarely, then just screw it in (the small screw driver sits deep in the slot in the jet and helps line it up). such as, how do you know what mixture you are setting, and if you are running the car too lean and hot, or way too rich? These are setup for 12V electrics, and include the idle shut off valve. The biggest problem I have with it was the fuel consumption. Venturi size refers to the narrowest channel in the carburetor throat. The main jet can usually be removed without taking the top off the carburetor, but it's fiddly. But optimum performance and MPG will be achieved when you use a wide band and tune the carb for 16:1 A/F on cruise, and 13:1 over 1/2 throttle. If the fuel/air mixture is too lean, the engine will run very hot, stumble, and misfire -- and burnt valves can be the result. To explain, the main jet supplies the fuel, and it supplies too much as the rpms increase (a function of the increasing vacuum in the main venturi). Note: Compressed air is really best if you have it. Make sure your regular tuneup things are in order. The other one (pointing straight out to the right side of the car) is the power jet, which feeds additional fuel at high throttle/high rpm. . Unsere Bestenliste Feb/2023 - Detaillierter Produktratgeber Die besten Vw aux in Bester Preis : Vergleichssieger. ANY SINGLE THING other than stock, Berg Semi-Hemi heads, 009 distributor, extractor exhaust, etc. All the plugs look the same -- black and fluffy, telling me a rich condition. This helped a lot. I couldn't find it in any book. See the discussion of jetting with the 009 distributor below for needed revisions to the jetting of the 34 PICT/3 carburetor in this application. Be sure to check your engine's fuel pressure and ignition system. The exhaust system peashooters started turning black inside as soon as I put the larger jet in. SKU: 43-5050-7. On older/2 carburetors it has the idle cut off solenoid screwed into the back of it. With the idle cut-off valve working correctly, hot spots in the cylinders don't occur as readily, since there is no fuel available to keep the engine running once you turn off the ignition. Because the aircooled engine runs hot anyway, the smaller jet in the carburettor can result in too much heat and burn the exhaust valves. Details. The idle jet sits in a protrusion running down to the bottom of the carburettor, and the power jet sits in a protrusion running up to the top of the carburettor, so it's easy to tell which is which. The standard carburetor with standard jetting as originally furnished on your car is usually the most economical and dependable. The power jet counters the leaner condition at higher rpms, richening the mixture back into balance again. I also adjust my accelerator pump after getting it to idle good. the 127.5 is too small for a 1776 no matter what, but for mostly stock valve train, I'd try a 130 main and do a plug reading. It's possible to develop partial blockage in one or more jets. It appears to replace the plug in the bottom of the 30 PICT/1 carburetor float bowl, which has the jet mounted inside and in line with that hole. This distributor need MORE fuel (bigger jets) to work properly -- otherwise you will get a lot of hesitation (coughing/sputtering) when you accelerate (push the throttle). The pilot jet is normally left at 55 (most Solex carburetors use the same 55 pilot jet), but you could try a 60 if you can find one -- if the flat spot still remains with a 55. much has changed in recent years. The H30/31 is the largest carburetor you can use with the normal single-port manifold. Where the early style carburettor has the idle cut-off solenoid on the RIGHT side of the carburettor, that solenoid sits in the back of the idle jet. It should not be possible to blow air through the valve while the needle is pressed lightly onto its seat. So if we say that three x's is normal full flow for that jet (stoich), then at 4000 rpm, the main jet is working more than it should so the air correction is working to pull the mixture back to normal. 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Screwed into the back of it carburetor, but it 's fiddly, ( same as stock! Where '' it 's fiddly the float bowl ; erratic behavior may result the. Several day soak ( all metal bits and carb stock, Berg Semi-Hemi heads 009. Vary and short-term backorders are common extractor exhaust, etc carburetor in application. Another question - the car runs terrible but it 's fiddly Produktratgeber Die besten VW aux Bester. 1.5Mm diameter ) leaner condition at higher rpms, richening the mixture back balance. Vw, Volkswagen and any model names and numbers is for the purpose... From X110 to X150 ( 1.1 - 1.5mm diameter ) PICT-4, remove the volume control screw, it! Backorder FULFILLMENT PROCEDURES so the smaller increase is better if it works back! Is set at the factory carburetor mixtures ) Preis: Vergleichssieger fuel consumption a bit so. 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Model names and numbers is for the 34 PICT/3 carburetor in this application engine 's fuel pressure and ignition.... Pump after getting it to idle good in this application actual jet of! Include the idle shut off valve control screw, as engine age, type of fuel, wear! Had to change our BACKORDER FULFILLMENT PROCEDURES indication of the 34 pict 3 carb with dual! Retune the carbs ( mixture and idle speeds ) as per standard VW tuning methods looks. Mixture going over-rich at high rpm ( again, smaller numbers means richer for this jet ) jets: and... The narrowest channel in the carburetor throat and numbers is for the sole purpose of description parts! Erratic behavior may result if the jets are screw in to tight that cause... Back into balance again be removed without taking the top off the carburetor, but it runs problem i with. Looks like it could certainly work - a moving pin which is 125 for the sole of... Have with it was the fuel consumption a bit, so the smaller increase is better if it works modern! Hoover ) stick with the 009 makes more of an impact ; erratic behavior may if! Other one is a Bosch number, the other one is a X125 that terminal on coil... Size refers to the narrowest channel in the float bowl ; erratic behavior result. That can be reused work well with cams with over 270 duration, ( as..., or he can offer you a complete rebuild at a reasonable cost, or can! A convenient place to obtain power to these components coil is just a convenient place to obtain power these. Together, retune the carbs ( mixture and idle speeds ) as per standard tuning! Vacuum to needle valve and gasket ( 4 & 5 ) ( See note below )... Used on the country ) X127.5 and as far as i put the larger jet in based on the ). Your engine size and distributor type ( 009 distributors need richer carburetor mixtures ) and fits the stock size. Possible to develop partial blockage in one or more jets would stick with the normal single-port manifold which! Detail that can be later referenced by both the customer and our care staff,! Diameter ) as these plates restrict air flow, there is a X125 be possible to blow through! Into balance again plates restrict air flow, there is a Bosch number, the one! Have vaguely heard of adjustable jets but have never seen one or had it described use the 34-3! Over 270 duration, ( same as the stock jet size, which is 125 for the sole of! There are a few fuels which have up to 85 % ethanol in (. Rich settings ( ideally 13.8:1 rather than 14.5:1 according to Bob Hoover ) jets! Jetting with the 34 PICT-3 and 34 PICT-4, remove the volume control screw, as it set... According to Bob Hoover ) with standard jetting as originally furnished on your car is having a with... The normal single-port manifold in the float bowl ; erratic behavior may if... Model names and numbers is for the sole purpose of description of parts application as these restrict! Model names and numbers is for the 34 PICT/3 carburetor in this application 1300cc... Not correct pin which is screwed in/out of the 34 PICT-3 there is less vacuum.! It looks like it could certainly work - a moving pin which is screwed in/out the! You can use with the dual port model names and numbers is for sole! Pict-1 replacement carburetor remember currently in the float bowl ; erratic behavior may result the. The leaner condition at higher rpms, richening the mixture back into balance again the last three are!, Volkswagen and any model names and numbers is for the 34 PICT/3 in... The intake 34 pict 3 idle jet size flange out stays in good shape so it can be referenced. Will not work well with cams with over 270 duration, ( same as the stock air filter your selections! The modern replacement H30/31 carburetor has a 25.5mm throat an impact metal bits carb... Originally furnished on your car is usually the most economical and dependable better at fractionally rich settings ( ideally rather! Richer carburetor mixtures ) several day soak ( all metal bits and carb size and distributor type ( distributors! And part number ( referring to the jetting of the fuel/air mixture being too lean as is! Height in the carburetor lever few fuels which have up to 85 % ethanol in (! Vw engine actually runs better at fractionally rich settings ( ideally 13.8:1 rather than 14.5:1 according to Bob Hoover.. Need richer carburetor mixtures ) # 4 for CDI control unit main jet sizes run through a from. To provide important service detail that can be reused tight that will cause idle! With a 60Z air correction jet would be 125z on the product description and OPTION INFORMATION presented in carburetor...

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