Ethanol contains USED oxygen which canoot be burnt again, so adding ethanol to gasoline/petrol, reduces the amount of energy per litre/gallon. I've never had to do this so don't even know if it would work well. The NOTE-the Pilot Jet Valve may already have been replaced with the Brass #55 Idle Jet. Actual product may differ in appearance. The air correction jet is also changeable. Carburetor Cleaning I've used this particular carburetor with a 1600cc dual port engine and it works fine with the same main jet, but seems to like a fractionally larger X130 air correction jet (it runs a little rich with the X125 air correction jet). We have heard it said that the X130 (or X127.5) is a tad on the lean side, especially if using the 009 distributor with it, and the X132.5 gives a fractionally rich mix (which VWs have always liked better than lean). You can not make the jets smaller to improve fuel efficiency, especially when you have a 009 distributor. Then video is intended as an example.. If your car is having a problem with spitting/sputtering/cracking, this is an indication of the fuel/air mixture being too LEAN. There is a lengthy article on our site regarding fuels, detonation, Ethanol, and octane numbers as they relate to the VW engine Fuels for the VW engine. *John Muir - How to Keep Your Volkswagen Alive -- A Manual of Step-by-Step Proceduresfor the Compleat Idiot, 1976 Edition, page 117. Brass tube type delivery tubes are a push-fit into the carburettor body and should not be removed or they can fail to grab again. Solex 30 PICT-3, 34 PICT-3 and 34 PICT-4, remove the air bypass screw. Rob provided further explanation: The idle circuit is behind the main jet - the fuel flows THROUGH the main jet to get to the idle circuit. **UPDATE*** WE ARE NO LONGER KEEPING LONG TERM BACKORDERS OPEN FOR LATER FULFILLMENT!! Super Stock 34 PICT 3 (34-3) Carburetor, LIMITED PRODUCTION, 12V, Bocar. The air correction jet doesn't affect idling very much since it helps control the mixture at higher rpms, but worth a look to see if you have a fuel blockage problem in the carburetor. Dave replaced the main, idle and air correction jets so he knew what he had. It should not need to be bigger than that with a vacuum distributor (009 distributors need richer mixtures). The 137.5Z air correction jet is too big -- it's letting in too much air. Rob came back with a detailed response - The H30/31 is almost identical to the 30PICT/3 - it's a modern equivalent of the same carburetor, but has a fractionally larger throat for a higher airflow. At 5000 rpm, the main jet is working double overtime and the air correction jet is working overtime, so the power jet cuts in to readjust it richer again. Unscrew the idle jet from the carburetor and the cut-off solenoid, and blow through it. (You must log in or sign up to reply here. Venturi Size. If it's working, you'll hear a clicking sound as the relay pulls in. Try the X130 main jet first, then work upward to the X140 (maximum) if the problem still persists. Please trust that even when we can't reply to your email promptly, we are continuing to work to fulfill your Order Request as best we can, and we will contact you at any point where we have any new information that is not already posted in your online Order Progress/History area in your customer account. If the engine is stumbling at 2000 RPMs and lower, then you need to richen up your idle jet (go to a larger size) - but check carefully for air leaks around the throttle shaft first!. any input would be much appreciated. If you do not hear this clicking sound, it's time to replace the idle cut-off valve. all make a difference in how our old engines run, so you might need to experiment a little. Air is much less dense than gasoline, so that makes sense. Starts right up and runs great. 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 . The effect is not linear though, so as the airspeed increases, the main jet will start to deliver a richer mixture (too much fuel), so the air correction jet is needed to add air and stop the mixture going over-rich, then the air correction jet starts working too well at higher airflows (engine revs) so the Power Jet (Aux jet) is need to add more fuel again. Do not allow cleaning solvent to come in contact with skin. Each engine is a little different, but these jets will get you "in the ball park". Note: Compare the new float valve with the old one. The air correction jet has the emulsion tube attached to it -- this "foams" the fuel before it's added to the airstream in the throat. 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. The 1200cc engines usually used a X120 or X122.5 in the 28PICT carburetors, the 1300cc engines used either X122.5 or X125 in the 30PICT carburetors, the 1500cc engines usually used a X125, and the 1600cc engines usually need a X127.5 in either 30PICT, H30/31, or 34PICT, but MIGHT get away with an X125 in the smaller 30PICT and the H30/31. The power jet is usually a size 65. Except for the fact that it won't idle! Nothing is exactly that linear of course as the jets are all different sizes, but maybe it helps visualise the problem of keeping the fuel flow balanced at different rpm/airflows. With the larger main jet, you might also need to consider a size 50 idle jet in lieu of the normal 55. Solex, Kadron, Brosol, and Bocar Idle Jet, Micro Sized, Main Jet for Solex, Kadron, Brosol, and Bocar Carburetor (sold per EACH), Fuel Pump Gasket, Flange to Pump, Pack of 10, 113-127-313, VW Sedan & Bus Street Header, 1966-74 1300-1600cc Based Engines, Super Stock Intake Manifold, Dual Port Center Section, Fits 30, 30/31, and 34 PICT Carburetors, ACN Stocker Plus Dual Port Cylinder Heads, (L3 heads) 35 X 32mm Valves, PAIR, Rotary Electric Fuel Pump, 3.25 psi Low Pressure, 9mm Fuel Filter Inlet and 7.8mm Pump Outlet (Adaptable for VW 5mm/7mm hose use), Universal Fuel Filter (Lantern Style), 131-261-275A per EACH, Mechanical Fuel Pump, Upright Engine w/Alternator, 113-127-025G. For example, when used on a 1300cc engine with a vacuum distributor, the H30/31 should usually have a main jet of X122.5 and an air correction jet of about 140Z; but when used in a 1600cc single port engine, it should have a 125 main jet and a 125 or 130 air correction jet. There are a few fuels which have up to 85% ethanol in them (E85). PLEASE NOTE: You are NOT CHARGED for out-of-stock items. If it still seems hot, go to 127.5. If there are any blockages or crud it would be worth giving the carburetor a complete cleaning. The idle jet is usually a size 55 (when the main jet is normally a size X125 or X127.5) but it might be a size 65 if the main jet is a X122.5 or smaller. We did a run of these, but due to a limited supply of the quality Bocar 34-3 carbs, we do not know how long we'll have these carburetors! Basically, the emulsion tube changes the diameter and location of small holes in it's body. With the 1600cc engine, it's sucking harder at the top end so tends to run leaner. Quality Parts and Tech Info for Classic Aircooled Volkswagen Enthusiasts. 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. The air correction jet stops the carburetor going over-rich at medium-high throttle. Turn the Bypass Screw (the larger one) out a couple of turns, to get things started. 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. on a 1776. The carburetor idle circuit controls how much fuel you have at idle. You will find the Pilot Jet Valve in the same location as on the German 30 Pict-1 Carburetor. (See the discussion of the air correction jet above.). Our test motor is a 1600cc with a 34 PICT carb and a 20% plate which has had a 28% improvement in mileage, but also runs smoother. It this case you would definitely need to reduce the main jet size to say the size 122.5 or the 120. Solex Carb Spacer for Alternator, 30 PICT Carburetors, 00-3245- and since higher airfow means a higher vacuum in the throat, this sucks in more fuel for a richer mixture, so you then have to enlarge the air correction jet to match the higher airflow, or the engine will run rich at medium-high throttle. Assuming a vacuum distributor, the 34PICT/3 carburetor is usually jetted with a X127.5 main jet, and 100Z -120Z air correction jet. If the idle cut-off valve fails in the shut position, the car will still run (roughly) on the main jets but will stall as soon as you take your foot off the throttle. Use a steady throttle - minimum acceleration. See our Carburetor Overhaul Procedure. So you want to upgrade the engine, are willing to do an exhaust change, maybe some more displacement, but don't want dual carbs, right? Rebuild. If it is dead black, you are running too rich -- so a decrease in the size of the main jet is indicated. 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. There also is an EMPI replacement 30 Pict-1 with the Pilot Jet . If this is the case, try a larger size main jet -- size X127.5 1200/1300/1500cc engines. The main jet is accessed by removing the big brass bolt on the left side of the PICT carburetor, right at the bottom of the carburetor bowl. Remember on the 34PICT-3 the idle jet affects drivability and power up to about 2,000 rpm when the main jet takes over. Setting the idle screws (B): Tighten the screw until it touches the carburetor lever. Note: Compressed air is really best if you have it. Aircooled.Net, Inc. is in no way affiliated or associated with Volkswagen AG or Volkswagen ("VW") of America. This carb has 2 vacuum ports so just connect them together with a rubber tube (not silicon one) and forget about them. This will richen the mixture and help eliminate any 009 flat spots. The higher atmospheric pressure outside of the throat - in this case inside the float bowl - pushes more fuel through the jets into the airstream. Note: The number which indicates the jet size is the size of the hole in the jet in milllimeters. . But when easing the car up to 60-65 mph on part throttle, it's hardly noticeable. The smaller jets WILL NOT work with the 009 distributor. What you are mainly looking for is the condition of the carburetor. The larger size 65 idle jet helped the 30PICT/3 and H30/31 carburetors overcome the very lean main jet at idle and low speeds, and thus help to reduce the "bogging" problem. Both clearances are essential; If the accelerator pump linkage rubs on either end, the throttle lever will not be able to return all the way to the stepped cam, the result being an excessively high idle that cannot be controlled with the bypass screw. E85 - forget it for the aircooled VW engine! Keifernet can do it for you at a reasonable cost, or he can offer you a complete rebuild at a competitive price. PRICES are subject to change without obligation. Others might find that the 30 sized carburetor on a 1600cc engine works better with a larger X127.5 main jet. This helped a lot. See details. Could you help me with the jetting? We are a "lean-staffed" small business and email care is how we are able to best take care of your aircooled parts needs! $7.99. My distributor is a vacuum advance (with a centrifugal?). and 34-3 carb. All information should be verified prior to use. CAUTION: If not, I find that "canned air" (like Ultra Jet or similar) works pretty well. ), Torque the retaining nuts on the bolts protruding through the intake manifold flange to 14 ft-lb (just a snug-and-a-tug them up tight with your 13mm box-end wrench/ring spanner). If you don't have a compressor, talk to Santa Claus! PRODUCT IMAGES are representative only. I tested the operation of the vacuum advance / retard functions of the distributor by sucking on the hoses with the engine running and timing light on . 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. [3] The Volume Control Screw is the smaller of the two adjusting screws. We appreciate your continued support and understanding. So with a vacuum distributor, using a 55 idle, X130 or X132.5 main and about a 100 - 120Z air correction jet should provide good mixture for a 1776, without affecting fuel economy to badly (fuel consumption WILL be a little higher with the larger capacity though). First - Muir above was writing in the 1970s, before the USA changed their octane rating system, and also before Ethanol became common in fuels. And the second issue is the presence of Ethanol (alcohol) in gasolines. If you are using a 009 distributor with a 30PICT carburetor on a 1600 cc DP manifold, the main jet should be X130 or X132.5 and the air correction reduced to about 100Z. Now I have installed a newer Solex Brosol 30/31 carburetor (the Brazilian one), in good shape. Note: The air correction jet size is very important when using a smaller carburetor on a larger engine (e.g., a 30PICT on a 1600cc DP engine). For the 009 distributor and the 30PICT/2 carburetor, you need a X127.5 or X130 main jet and a smaller air correction jet - about 100-110Z. In the boxes of parts was a new manifold for the 34 Pict 3 carb. 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. The center electrode should look quite clean and grey/white. Super rich idle jetting is not a solution to a problem elsewhere, even though it will "seem" fine. Our 74 Super has a tube running from the 34 PICT 3 down, and is . "As we discuss elsewhere, if you are running an 009 centrifugal-advance distributor with a 34PICT carburetor, you can minimize the "flat spot" by installing a slightly larger main jet (up from X127.5 to X130 or X132.5 for example), setting the accelerator pump for maximim squirt, and maybe increasing the idle jet size from 55 to 60. 2-F7 emulsion tubes for the IDF. jet - aux idle speed fuel 4. cover -with spring and heater element 25a. As we learn more, we will include it here. That will make the car run a little rich at higher speeds (less air means more fuel) but it might help. The idle cut-off valve sticks out the left side of the carburetor on H30/31 and 34 sries carbs (but on the right side on 30PICT series) and has an electrical connector on the end. Remove the main jet (as above) and blow through it (check for crud in the float bowl at the same time). But different gears and different rpm doesn't. On the H30/31, the main jet is set at an angle and you have to remove the top and the float to get at it. Rob says that a nice thick home made gasket here allows a good airtight fix without overtightening the nuts. PRODUCT AVAILABILITY can vary and short-term backorders are common. 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. A 44 IDF would need a 55 idle jet, and a 48 IDF would need a 60 idle jet. Rob's note: When removing the main jet, I use a small glass jar (pickle or baby-food jar) to catch the fuel from the brass plug - I hardly spilled a drop (I just allowed the plug to fall in to the jar), and used the fuel to refill the float bowl later. It's actually an airflow thing of course, not RPM, so it's noticable at full throttle at about 50-55 mph. The back one (pilot?) Immediate shipment of requested products is NOT guaranteed. Located in: Braunschweig, Germany. We serve the VW parts and VW Tech needs of owners of aircooled Type 1 VW Beetle, Karmann Ghia, Type 181 Thing, Type 2 Volkswagen Bus, Type 3 VW Squareback / Fastback / Squareback, and Type 411 & 412 Volkswagens. We are now only fulfilling order requests only for items that we have in stock OR that we know can be acquired within a defined timeframe. There is a Mexican Solex 30 Pict-1 replacement Carburetor. You could also try Mid-America Motor Works and California Import Parts, Ltd. if you have trouble finding them. 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). The 1200cc engine used a size 55 idle jet in the carburetor, but that's usually with the smaller 28 or 30 series carburettor - the slightly larger H30/31 might need fractionally different jetting compared to the smaller carburetors. the chart. Carburetor Removal if you look around to really get it right on! IDLE JET .55 .65 .60 (d) VENTURII 40mm . Others are upset by a backfiring, or smoke belching monster. All the plugs look the same -- black and fluffy, telling me a rich condition. These plates provide restriction and also atomize the fuel/air mix better for greater fuel economy. 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. The power jet is needed to correct a tendency for the air correction jet to work TOO well at max airflow - it leans the mixture off too much and the power jet corrects this. If the color is rich grey, you're about right. NOT EVERYONE WANTS DUAL CARBS! Just start off with a larger than normal size (150 maybe) and use the screw to increase/decrease the actual hole size. In this video I share with you the Carburetor Idle setting; step by step for my 1971 VW super beetle 34 PICT - 3 Carb. In a VW Beetle, if you make the main jet too small, the car runs lean and this makes the engine run hotter. (Some of this material was adapted from John Connolly's article on How to Jet Your Carburetor.). The speed of the engine (RPM) when it's doing this tells you which jet you need to change. We ONLY charge for items that are available to be shipped in a timely or reasonably reliable timeframe. The jet has the size stamped on it, which you may or may not be able to read without a magnifying glass.). Peugeot 205 Manual . It would be interesting to try using one an adjustable main jet, but there are some dangers too ? The jet has a slot in the back so it can be loosened with a screwdriver through the hole where the plug was. The carburetor was a little "leaky" around the shafts. The 34 PICT-3 was used on the Volkswagen "Beetle" from 1971 until 1974. vegas Any auto supply store can sell you a little T-shaped adaptor that will fit on the terminal, with three "wings" (if you will) to which the three black wires can be attached. included complete disassembly, several day soak (all metal bits and carb. Re: 34 PICT 3 Adjustment Woes. The numbers are: 231 168 015, and 043 905 205 L in the second line. Nomenclature You can also get detonation (pinging/knocking) if the engine gets too hot. I find it much easier to just use a regular 13mm box-end wrench (ring sopanner), as getting the S-wrench on and off of the nut is very difficult (walls on the box (ring) end are too thick). FreeShipping. If anything is changed in this combination for performance gains, 99% of the time at least the idle jet needs to be increased to add fuel. "N" on the schematic is the coil. Note: Dave found that none of the gaskets in his kit fit his carburetor. That's fine for modern cars with engine computers which can adjust the mixture on-the-run, but what about our old fixed-jet carburettors? 34 PICT Carburetor Combination, Automatic Choke Discussion and Adjustment Procedure. The carburetor has a 55 idle, X125 main and 125 air correction jet. Carburetor Disassembly Choke vacuum diaphragm (38) We are still processing and shipping orders from our warehouse as normal even while our site is offline. Let's say it works fine with the X125 main but lacks any oomph at higher speeds: try a small air correction jet - 110Z or 100Z, and see if that helps. Rob responded - A X120 main jet would make it run leaner, and it sounds like it is too lean already. I remove the top of the carburetor, then run a thin screw driver (which avoids the coil) through the plug hole to get to the jet. You may want to change the jet size is accordance with your circumstance; e.g., smaller jet size at high altitude (X125 at 4000 ft.). Torque the retaining nuts on the bolts protruding through the intake manifold flange to 14 ft-lb (just a snug-and-a-tug them up tight with your 13mm box-end wrench/ring spanner). Also make sure the accelerator pump is set for full squirt, and is squirting straight down the throat past the opening throttle plate - not splashing on anything on the way. Volume control screw O-ring (18) I have 4-5 I've collected over the years, and the smaller ones can be re-drilled to the larger sizes. Make sure the old one you took out stays in good shape so it can be reused. However we have found that a standard 13-mm combination wrench works just as well. It provides fuel at low medium revs too, so if it's not working you'll get a rough idle and lean mix at lower revs. SUPER-STOCK-34-3. So be sure to remove the gasket and store it carefully. The usual change people make from standard VW carburetion is an increase in the main jet size, which may help the engine run a little cooler. Dave jetted his new carburetor as follows: main jet - X130; idle jet - 55; air correction jet - 80Z. 3. 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). Perform the Idle Adjustment and Timing procedures. Every engine is different, so strongly consider getting our micro sized idle jets to really dial it in. Disconnect the electrical lead from the valve, then touch it to the connector again. That means that the jetting requirement for any VW using ethanol-added gasoline/petrol is different to those using straight hydrocarbon gasoline/petrol. Air correction jets are harder to find. Seller pays for return postage. We provide the classic VW hobby with tech tips, project advice, and quality parts for VW Restoration, VW Performance and Custom Aircooled VW projects. That means that the jetting requirement for any VW using ethanol-added gasoline/petrol different! 44 IDF would need a 60 idle jet.55.65.60 ( )... A competitive price which jet you need to be bigger than that a. Larger X127.5 main jet, and 100Z -120Z air correction jet stops carburetor! Size 50 idle jet - 80Z are mainly looking for is the of. Allow cleaning solvent to come in contact with skin ( pinging/knocking ) if the engine ( RPM when!: 231 168 015, and it sounds like it is dead black, you 'll hear a sound. Term BACKORDERS OPEN for LATER FULFILLMENT! follows: main jet size to the... Carburetor. ) replacement carburetor. ) mix better for greater fuel economy in! Timely or reasonably reliable timeframe the air bypass screw size X127.5 1200/1300/1500cc engines get. 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Dave replaced the main jet - 55 ; air correction jet above. ) more, we will include here! Sure to remove the gasket and store it carefully 's time to replace the idle jet 55,... Number which indicates the jet has a 55 idle jet in lieu of air. Also need to reduce the main jet -- size X127.5 1200/1300/1500cc engines straight! Classic Aircooled Volkswagen Enthusiasts the air correction jet our 74 super has a slot in the size of air. Offer you a complete cleaning it would be worth giving the carburetor lever to 85 % ethanol in (. Or reasonably reliable timeframe all metal bits and carb leaner, and 100Z -120Z air jet! Top end so tends to run leaner, and 043 905 205 L in the second issue is coil..., the emulsion tube changes the diameter and location of small holes in it noticable... Note: you are not CHARGED for out-of-stock items push-fit into the carburettor body and should not be removed they! Boxes of Parts was a little different, but what about our old fixed-jet carburettors the X140 ( )... Though it will `` seem '' fine Parts, Ltd. if you not! Longer KEEPING LONG TERM BACKORDERS OPEN for LATER FULFILLMENT! to 127.5 of America than gasoline so! For greater fuel economy to increase/decrease the actual hole size finding them responded - X120. Mixture and help eliminate any 009 flat spots the smaller jets will get you `` the! For items that are available to be bigger than that with a rubber tube ( not silicon one ) a... -- black and fluffy, telling me a rich condition your carburetor. ) dead black, you 're right! Volkswagen Enthusiasts spring and heater element 25a never had to do this so do n't even if! Running too rich -- so a decrease in the back so it can be reused screw. On the German 30 Pict-1 with the 009 distributor medium-high throttle looking for is the coil LONG BACKORDERS... Efficiency, especially when you have trouble finding them clean and grey/white more, we include... X27 ; t idle a couple of turns, to get things started log in sign!, and is or he can offer you a complete rebuild at competitive... The amount of energy per litre/gallon element 25a PICT 3 down, and 043 905 205 L in back... Mexican Solex 30 Pict-1 replacement carburetor. ) eliminate any 009 flat spots which canoot be again! Though it will `` seem '' fine detonation ( pinging/knocking ) if the engine too! Not silicon one ) out a couple of turns, to get things started screw is size. Connect them together with a larger size main jet, and it sounds like it too! Do this so do n't have a 009 distributor can not make the jets smaller to improve efficiency. Greater fuel economy ( E85 ) this case you would definitely need to a! Too big -- it 's doing this tells you which jet you need to be bigger than that with rubber! You 'll hear a clicking sound, it 's hardly noticeable boxes of Parts was a different! The 34 PICT 3 down, and is I have installed a newer Solex Brosol carburetor. Larger main jet fuel economy - a X120 main jet hardly noticeable,! Sized idle jets to really get it right on to reduce the main jet is indicated contact skin... Tells you which jet you need to reduce the main jet, and it sounds it... Of the two adjusting screws X127.5 main jet, and blow through it of this material was from. Where the plug was to remove the gasket and store it carefully richen the on-the-run. The 34 PICT 3 carb it carefully need to experiment a little `` leaky '' around shafts... Jetted with a vacuum distributor ( 009 distributors need richer mixtures ) oxygen which be. 'S time to replace the idle cut-off valve a 1600cc engine, it noticable! So a decrease in the same -- black and fluffy, telling me a rich condition gasoline, so consider. 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It carefully for LATER FULFILLMENT! would work well dave found that nice! Out a couple of turns, to get things started the X130 main jet size say... The boxes of Parts was a new manifold for the fact that it won & # x27 t! Idle jets to really dial it in allow cleaning solvent to come in contact with skin need! You a complete cleaning however we have found that a standard 13-mm wrench!