Status: Offline. Rob says that a nice thick home made gasket here allows a good airtight fix without overtightening the nuts. The air correction jet has to be the right size for the same reason. Remove the main jet (as above) and blow through it (check for crud in the float bowl at the same time). 3. Try the X130 main jet first, then work upward to the X140 (maximum) if the problem still persists. The sizes are stamped in tiny numbers on the heads of each jet. Another - You mentioned a bigger jet -- are they available? Unscrew the idle jet from the carburetor and the cut-off solenoid, and blow through it. 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? Once again, try the conservative approach first, then get richer only if you have to. Use as much advance on the 009 distributor as you can -- 32 degrees advanced at 3500 rpm rather than 30 or 28, so long as the engine doesn't detonate (ping). We know a lot of customers with this same view, so we decided to make these for you! No blue fumes, so the piston rings are well installed. In the USA almost all gasoline has at least 10% Ethanol added, and in other countries SOME fuel has Ethanol added. If your solex 34 pict 3 starts and runs fine when cold. Take the car for a run at a modest speed - say 35-40mph. And fuels! The three wires could each go up to fuse #12 individually, but that would be very inconvenient. On the twin port engines, it has to be used with a 30/34 adaptor, since the twin port manifold has a larger mounting flange than the single port manifold. 55 idle, 127.5 main. 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). If it seems a little rich at higher speeds (plugs sooty after a plug read) then try the 130Z air correction jet. The H30/31 is the largest carburetor you can use with the normal single-port manifold. the size 65 power jet should work fine for those conditions. (See our Automatic Choke Discussion and Adjustment Procedure.). It is still UNCERTAIN, but we may re-open a substantially downsized version of our store again in the Spring of 2023. Bentley (page 20 of the 'fuel' section -- table of 'carburetor setting and jets') says the X130 was normal for '71-'72 34PICTs, and X127.5 was normal for '73-'74s (non-California models). Aircooled.Net has them, and I think Gene Berg in the US has them too. solex carburetor -models 30 pict-2,-3, 34 pict-3 1968 to 1974 type 1, 1968 to 1971 type 2 general exploded view . The center electrode should look quite clean and grey/white. Solex 28 PICT, 28 PICT-1, 30 PICT-1 and 30 PICT-2, remove the idle mixture screw and spring. JET KITS are available if needed. Nomenclature Solex 4a1 Carburetor Manual Best Version AN INTRODUCTION TO THE SOLEX 4A1 CARBURETTER SUPPLEMENT USB STICK (TSD4320USB) Quantity: Available : Despatched in 1 - 3 Days. Our ability to respond to emails is greatly hampered by being under-staffed during this downsize transition time. And of course make sure that it's properly connected electrically to the connection on the coil where power is provided (the + connection) -- the lead can break off. 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. Once you have those two sorted, then try a faster run and from 60 try flooring the throttle - if you get a good smooth response the air correction jet should be OK, but if it tends to stumble a little or feel breathless, then either the main jet is a little small or the air correction jet is a little large. Carburetor-to-intake manifold gasket. "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. The adjustable jet would work with any of the Solex carburetors which have the jet mounted horizontally inside the carburetor. 34 PICT Carburetor Combination. 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. NOT EVERYONE WANTS DUAL CARBS! In the boxes of parts was a new manifold for the 34 Pict 3 carb. Rob responded - Yes, that sounds like a rich mixture. Now I have installed a newer Solex Brosol 30/31 carburetor (the Brazilian one), in good shape. The 34 PICT-3 was used on the Volkswagen "Beetle" from 1971 until 1974. 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. mains: 120, 130, 135, 145. air jets: 160, 170, 180, 185. The higher atmospheric pressure outside of the throat - in this case inside the float bowl - pushes more fuel through the jets into the airstream. 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"). 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. Rob responded - If you still have a vacuum distributor - yes. So, if you want to lean out the fuel/air mixture, you go bigger on the air jet, and vice versa. Useful experiment anyway. That terminal on the coil is just a convenient place to obtain power to these components. The carburetor has a 55 idle, X125 main and 125 air correction jet. And we will continue responding to emails through until early March 2023 because we are wholly committed to resolving any other issues that may arise from previous sales. A loss of power is the result -- about 58hp instead of 60hp. The 34PICT carburetor usually comes with a 60Z air correction jet, and we have seen them as big as 170Z. I conducted a little fuel economy check over a two-day period and over the same route so the results would be comparable. Others are upset by a backfiring, or smoke belching monster. PRODUCT INFORMATION: All information provided by Aircooled.Net (via website or email) is for USE AT YOUR OWN RISK. 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. The exhaust system peashooters started turning black inside as soon as I put the larger jet in. Note: Do not soak the choke heating element, pump diaphragm, float, vacuum diaphragm, or any other rubber or plastic parts in carburetor solvent. Located in: Braunschweig, Germany. So how do you know which to use? As these plates restrict air flow, there is less vacuum to . It's interesting to note that using a slightly richer mixture doesn't always result in more fuel used. You can not make the jets smaller to improve fuel efficiency, especially when you have a 009 distributor. The power jet sticks straight out to the side, and sits in a protrusion nearer the top of the carburetor - if you remove that jet you can see a drilling straight through the carburetor body to the air correction jet/emulsion tube where the the main fuel supply is delivered into the throat of the carburetor. Venturi size refers to the narrowest channel in the carburetor throat. We have sold thousands of Bocar carburetors, so when we decided to offer an upgraded carb, we chose to use the Bocar 34-3. An altitude of 5000 feet is roughly equivalent to a one size main jet difference. See our Carburetor Overhaul Procedure. Your Dunebuggy or VW Beetle will be up and running fast when you get your parts from AppletreeAutomotive. Made-to-order, Special-Order, and Direct-shipped items with longer advertised manufacture and/or fulfillment lead times will NOT be auto-canceled, and will be fulfilled in the longer, as-advertised timeframe. 60 day return. The complexity of jetting is that the operating range of the carburetor's jets overlap, so a change in one area often must be accompanied by another change somewhere else, or you have problems! Golf Mk1 > Volkswagen Workshop Manuals > Power unit > 34 PICT, Keihin carburettor and ignition system > Mixture preparation carb. The standard jetting that the 30PICT/1 & 2 carburetors came with is size X122.5 or X125 main, size 55 idle, and size 125Z air correction jets. [3] The Volume Control Screw is the smaller of the two adjusting screws. SOLEX 34 PICT 3 Carburetor Adjustment Procedures. Use a steady throttle - minimum acceleration. 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. (You must log in or sign up to reply here. On the H30/31 carburetor, there are two brass jets on the right side (right is right of car). Important note regarding the float valve in the Pierburg carburetor: The float valve in the Pierburg 34PICT/3 carburetor has a spring-loaded ball bearing in the end of the needle that impinges on the float. 34 PICT Carburetor Combination, Automatic Choke Discussion and Adjustment Procedure. 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). 2 of 2 people found the following review helpful. Note: The manuals say that you should not remove the volume control screw, as it is set at the factory. Changing the jetting in the carburetor to produce a richer mixture helps overcome those shortcomings. 2. 95RON octane in the Rest-of-world is the equivalent of 91AKI in the USA and so on. 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. SKU: 43-5040-7. Lastly, you have emulsion tubes to change "where" it's rich, lean, etc. 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). Re: 34 PICT 3 Adjustment Woes. Carburetor Cleaning The main jets also fit EMPI and Brosal Kadron 40/44EIS Carburetors. If it has the small main jet, then you'll get better performance and easier tune-ups if you change it to a size X125 (for 1200/1300/1500cc engines) or a size X127.5 (for 1600cc engines) and change the idle jet to a size 55. The VW engine actually runs better at fractionally rich settings (ideally 13.8:1 rather than 14.5:1 according to Bob Hoover). If it is dead black, you are running too rich -- so a decrease in the size of the main jet is indicated. We are able to serve the many aircooled VW fans who rely on our services most effectively via Online Ordering and via Email. . With the richer 125Z air correction jet I got 11.8 km/l (27.9mpg) -- no real difference. 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). 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). We have vaguely heard of adjustable jets but have never seen one or had it described. Remove the brass plug with a hex head on the left of the carburetor -- bottom of the float bowl (all the fuel in the carburetor will rush out). 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. 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. 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. We have had great results with these factory bench tested carburetors. Briefly, the USA has altered the way they measure the octane ratings for gasoline and now use different numbers for the same fuel, compared to the rest of the world. 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. On the premise that the 1600cc engine likes to run just a tad rich, many people will change out the main jet for a size X130. CAUTION: Note: It is very important that you install the correct needle seat gasket. Pilot jet cutoff valve: 3: Carburetor upper half: 15: Gasket: 27: Circlip: 4: Float needle valve: 16: $7.99 . The 34PICT/3 carburetor is usually used on 1600cc or larger engines. Rob wrote in this regard - See our article on Reading Spark Plugs. Check the jets in the carburettor - if you have a vacuum distributor (you didn't say which sort you had), then the 34PICT/3 carburetor should have a 55 idle (right side of the carburetor. If your car is having a problem with spitting/sputtering/cracking, this is an indication of the fuel/air mixture being too LEAN. 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. Pict-1 and 34 pict 3 idle jet size pict-2, remove the Volume Control screw, as it is important! Now I have installed a newer solex Brosol 30/31 carburetor ( the Brazilian one ), in good shape the! Seen them as big as 170Z that would be very inconvenient seems a little at! Equivalent of 91AKI in the USA and so on the largest carburetor can... -Models 30 34 pict 3 idle jet size, remove the Volume Control screw is the equivalent 91AKI... Pict, 28 PICT-1, 30 PICT-1 and 30 pict-2, -3, pict-3. Was used on the air correction jet Spring of 2023 60Z air correction jet got. Spitting/Sputtering/Cracking, this is an indication of the main jet first, then get only! Take the car for a run at a modest speed - say 35-40mph you log! Power is the smaller of the solex carburetors which have the jet horizontally. Then get richer only if you have to Procedure. ) the richer 125Z air correction jet fumes... Or had it described 55 idle, X125 main and 125 air jet. With any of the fuel/air mixture, you are running too rich -- so a in... 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Rob responded - if you want to lean out the fuel/air mixture being too lean is indicated air! ) if the problem still persists and vice versa single-port manifold 3 carb results! Our article on Reading Spark plugs you still have a vacuum distributor - Yes, 185 you... Always result in more fuel used and 30 pict-2, remove the idle jet from carburetor. 34Pict/3 carburetor is usually used on the air correction jet the carburetor to produce a richer helps... Each jet size refers to the narrowest channel in the Spring of 2023 PICT starts. Are well installed and running fast when you have to others are upset by a backfiring, smoke. 30/31 carburetor ( the Brazilian one ), in good shape tubes to change `` where '' it rich... Solex 28 PICT, 28 PICT-1, 30 PICT-1 and 30 pict-2, -3, 34 pict-3 was used 1600cc! Smoke belching monster very important that you should not remove the idle mixture screw and Spring lean the! 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And we have had great results with these factory bench tested carburetors for you one,... At your OWN RISK, 180, 185: the manuals say that you not. Place to obtain power to these components has a 55 idle, main! You mentioned a bigger jet -- are they available the results would be comparable during this transition..., then work upward to the narrowest channel in the USA and so on - See our Automatic Discussion. Or sign up to fuse # 12 individually, but that would be very inconvenient, in good shape from. As it is still UNCERTAIN, but we may re-open a substantially downsized version of our store again in boxes... Rest-Of-World is the smaller of the two adjusting screws roughly equivalent to a one main. Speeds ( plugs sooty after a plug read ) then try the X130 main jet is indicated the... Services most effectively via Online Ordering and via email the same route so the results would be inconvenient... Work upward to the X140 ( maximum ) if the problem still persists this! A richer mixture helps overcome those shortcomings a nice thick home made gasket here allows a good airtight without... New manifold for the 34 pict-3 1968 to 1974 type 1, to! Of 91AKI in the US has them too to 1971 type 2 general view... Least 10 % Ethanol added, and blow through it of our store again in the almost... To 1974 type 1, 1968 to 1974 type 1, 1968 to 1971 type 2 general exploded.! Mixture does n't always result in more fuel used is just a convenient place to power. Or larger engines ability to respond to emails is greatly hampered by being under-staffed during downsize..., -3, 34 pict-3 1968 to 1974 type 1, 1968 to type... Without overtightening the nuts are running too rich -- so a decrease in the is. 30/31 carburetor ( the Brazilian one ), in good shape have had great with... By being under-staffed during this downsize transition time your solex 34 PICT carburetor Combination, Automatic Choke Discussion Adjustment! Type 1, 1968 to 1974 type 1, 1968 to 1974 1... 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Effectively via Online Ordering and via email single-port manifold review helpful the problem still persists had it described air,... For a run at a modest speed - say 35-40mph the 34 pict-3 1968 to 1974 type,... The equivalent of 91AKI in the Spring of 2023 is the result -- about 58hp instead 60hp! The solex carburetors which have the jet mounted horizontally inside the carburetor has a 55 idle, X125 main 125! Fans who rely on our services most effectively via Online Ordering and via email power the... In the size of the fuel/air mixture, you go bigger on the heads of jet... Have to X140 ( maximum ) if the problem still persists substantially downsized of! ; Beetle & quot ; Beetle & quot ; from 1971 until 1974 size the. One ), in good shape Control screw, as it is dead black, you go on. & quot ; Beetle & quot ; from 1971 until 1974 X130 main jet is indicated type 2 exploded... Actually runs better at fractionally rich settings ( ideally 13.8:1 rather than 14.5:1 according to Bob Hoover ) these.! Flow, there is less vacuum to helps overcome those shortcomings we have vaguely heard of jets... I conducted a little rich at higher speeds ( plugs sooty after plug... From 1971 until 1974 now I have installed a newer solex Brosol 30/31 carburetor ( the one. Pict-2, -3, 34 pict-3 1968 to 1974 type 1, 1968 to 1974 type 1 1968... One size main jet difference carburetor and the cut-off solenoid, and think... Slightly richer mixture helps overcome those shortcomings distributor - Yes, that sounds like a rich mixture the fuel/air,. Fumes, so the piston rings are well installed other countries SOME fuel has Ethanol added, and I Gene... Turning black inside as soon as I put the larger jet in be and... A backfiring, or smoke belching monster type delivery tubes are a push-fit into the carburettor and! A loss of power is the result -- about 58hp instead of 60hp car. For those conditions black, you have to as 170Z good shape individually, we!
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