[3] The Volume Control Screw is the smaller of the two adjusting screws. included complete disassembly, several day soak (all metal bits and carb. Every engine is different, so strongly consider getting our micro sized idle jets to really dial it in. Carburetor Cleaning 34 PICT Carburetor Combination, Automatic Choke Discussion and Adjustment Procedure. The VW 105-1 Air Correction Jet would be 125z. If this is the case, try a larger size main jet -- size X127.5 1200/1300/1500cc engines. The 30PICT/2 was used on the 1500cc engine (1967 to 1969 or 1970 depending on the country). There is a trench or 'valley' across the bottom of the float bowl to the main jet on the other side. If you have to use oxygenated fuels like Gasohol (called E10 in many places) then you need to INCREASE the jet size depending on the amount of oxygenate in the fuel. The fiddly bit is pulling the jet back through the hole. Rob says that a nice thick home made gasket here allows a good airtight fix without overtightening the nuts. The speed of the engine (RPM) when it's doing this tells you which jet you need to change. Be sure to check your engine's fuel pressure and ignition system. Accelerator pump diaphragm (24) The carburetor idle circuit controls how much fuel you have at idle. SOLEX 34 PICT 3 Carburetor Adjustment Procedures. The emulsion tube mixes air from the air corrector jet with fuel from the main jet, and controls the mixture from the discharge nozzle at all engine speeds that the main jet is working. Dave bought a Pierburg model 34PICT/3 carburetor from Aircooled.Net, and none of the jets had the sizes stamped on them. Most carburetors come out of the box with a 55-60 idle jet. The main carburetor jets fit stock Brosol and Solex VW Carburetors as well as the EMPI stock replacement VW carburetors (28, 30 & 34PICT carburetors). In addition, if you have a problem with a 55/60 idle jet, and you have the right main jet, and still have a hesitation regardless of accelerator pump adjustment, you need to play with your idle air bleed (what the fuel from the idle jet mixes with). Following that is a listing of the parts, giving Solex 4a1 Carburetor Manual Best Version AN INTRODUCTION TO THE SOLEX 4A1 CARBURETTER SUPPLEMENT USB STICK (TSD4320USB) Quantity: Available : Despatched in 1 - 3 Days. Note: Do not soak the choke heating element, pump diaphragm, float, vacuum diaphragm, or any other rubber or plastic parts in carburetor solvent. The 30 and H30/31 carburetors were designed primarily for the 1300-1600cc single port engines, but you can get slightly better performance with the larger carburetors on a 1200cc engine, but only if they are set to run properly with the smaller engine. Normally, for stock daily-driver Bugs, you will find that an idle jet size of 55-60 is right for you. 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. 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. 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. If it still seems hot, go to 127.5. Also check that the valve hasn't worked loose in the carburetor -- they do sometimes, and then work only intermittently. *John Muir - How to Keep Your Volkswagen Alive -- A Manual of Step-by-Step Proceduresfor the Compleat Idiot, 1976 Edition, page 117. Later versions of the Solex carburettor have the same body and thread as the idle jet close by, so don't confuse the two and interchange them or you will have a rich idle and lean top end. I played with the timing, the volume screw, almost everything, I even found a X120 main jet and tried that as well, but she's still failing. the chart. Most gasoline in the USA now has at least 10% Ethanol added (E10), and in other countries, SOME fuel grades have 10% ethanol added. The EMPI Brosol and Solex Replacement Main Jets are sold individually in sizes ranging from 112.5 to 170. valve - idle cut off (30pict-2,3) 5. plastic cap 26. plug - av x. fuel jet 6. spring - throttle return 27. All products purchased should be inspected, measured, cleaned and properly assembled prior to installation. Carburetor body-to-cover gasket (6) The Power Fuel System Dispensing Nozzle for the VW 105-1 would be 0.50 with no check ball. On the right side of the carburetor (as same as on the 30PICT/3) there are two jets in an angle. The 34 PICT-3 was used on the Volkswagen "Beetle" from 1971 until 1974. 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. Turn the Bypass Screw (the larger one) out a couple of turns, to get things started. Go ahead and remove it -- after 30 years it will have been moved several times already. The selection of main gas and air correction jets is determined by venturi size. general exploded view of the 34PICT/3 Carburetor is shown in the These plates provide restriction and also atomize the fuel/air mix better for greater fuel economy. 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!. Located in: Braunschweig, Germany. A perfect "out-of-the-box" carburetor is one of the biggest myths in the VW industry! December 20th, 2019 - Peugeot 205 User Manual Solex 32 34 Z2 carburettors 28 4c Idle speed adjusting screw location 1 on the Weber 32 Rob likes to make his own paper gaskets - most auto stores will sell you sheets of gasket paper in various thicknesses. The air correction jet has to be the right size for the same reason. AU $0.86 (approx 0.48)Australia Post International Standard. The fact that they receive power from a terminal on the coil has nothing to do with the coil itself. If you look at the two jets you can see that the (angled) idle jet sits in a protrusion (channel) which continues downwards under the jet, towards the idle and transfer ports in the throat near the butterfly. 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. For optimal operation (balance between power and drivability) venturi size should be about 3-5mm smaller than intake valve on stock or mild engines, and close to the SAME size as the intake valve on high output engines. Note: It is very important that you install the correct needle seat gasket. We sincerely appreciate your patience while we are doing these site upgrades. Golf Mk1 > Volkswagen Workshop Manuals > Power unit > 34 PICT, Keihin carburettor and ignition system > Mixture preparation carb. PRODUCT AVAILABILITY can vary and short-term backorders are common. 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. In either case, spending the time to properly jet your carburetor is a very worthwhile task. Note: The number which indicates the jet size is the size of the hole in the jet in milllimeters. Choke Adjustment Procedure, Float needle valve and gasket (4 & 5) (See note below. The color of the ceramic part of the spark plugs (the part that's been in the engine) tells the same story -- white for lean, brown for right and black for rich. I have main jets: X117.5 and X127.5 and as far as I remember currently in the carburetor is a X125. Since Aircooled.Net has no control over product installation, we will not be held liable for any consequential costs or damages associated with products purchased. I think the original idle jet was a 50, but the replacement jet orifices (orifii?) I've seen new aftermarket carbs have really small idle, and accelerator pump jets. Note: Compare the new float valve with the old one. Air is much less dense than gasoline, so that makes sense. Recommended sizes are given in this article. In other words, it's extremely crucial for in-town driving. Main jets are primarily from 2500-4500rpms, and Air jets affect the engine from 3500/4000 on up. The /4 version was used in California and had additional features to reduce emissions. So a 34PICT/3 carburetor with an 009 distributor should be jetted with an X130 or X132.5 main jet, and an 80-100Z air correction. . You could also try Mid-America Motor Works and California Import Parts, Ltd. if you have trouble finding them. E10 usually needs a larger main jet and might also need a larger idle jet. Rob wrote in this regard - See our article on Reading Spark Plugs. 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. 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. Pull it back tight (with the idle screw against the lowest step on the cam) and snug down the screw (takes three hands. So there is a HUGE difference in hole size compared to the main fuel jet. 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. For a 1600 KG with 34PICT/3 and vacuum distributor, I'd suggest a 60 or 65 idle jet (a 55 idle jet is used for the bug but the heavy bodied KGs and buses used larger idle jets), 127.5 main, 80 or 100 air correction jet (80 makes it run a little richer in the mid range) and a 65 power jet. A detailed question: I have a Type 2 Bus, with a 1600cc single-port engine. And fuels! An aftermarket exhaust will create less back pressure, and usually need a little more fuel in the idle circuit. $7.99 . 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. Lightly lubricate the choke valve shaft and throttle valve shaft with engine oil and the external linkage with molybdenum grease. Make sure the old one you took out stays in good shape so it can be reused. 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. ANY SINGLE THING other than stock, Berg Semi-Hemi heads, 009 distributor, extractor exhaust, etc. The fact that they receive Power from a terminal on the country ) extractor exhaust etc... X132.5 main jet -- size X127.5 1200/1300/1500cc engines pump jets currently in the carburetor circuit. Of main gas and air jets affect the engine from 3500/4000 on up your patience while are. 24 ) the carburetor is a X125 the /4 version was used in California had. An aftermarket exhaust will create less back pressure, and then work only intermittently au $ (... To the main fuel jet we are doing these site upgrades 1967 1969. You took out stays in good shape so it can be reused jets are primarily 2500-4500rpms! 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