On some models (the H30/31 for example) it is angled slightly towards the back of the car. So there is a HUGE difference in hole size compared to the main fuel jet. h 34 solex 32 34 z2 manual solex phh manual solex 32 34 pdf manual manual Download PDF Solex Ddh Service Manual File Size 24 MB File Type PDF File . to the back of the engine, in an angle) is a: g f 50 and the other: g f 50. For the 1600cc engine, you need more fuel flow, so a larger X127.5 main jet and 100Z or 120Z air correction jet are needed. (Adapted from John Connolly's article on How to Jet Your Carburetor. Dispatched today if paid within 1 hr 21 mins See details. I couldn't find it in any book. 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. NOTE-the Pilot Jet Valve may already have been replaced with the Brass #55 Idle Jet. Note: The number which indicates the jet size is the size of the hole in the jet in milllimeters. 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). But if you are using a cheater cam, or have a larger engine, this will likely work very well for you if you don't want the hassle of dual carbs! With the larger main jet, you might also need to consider a size 50 idle jet in lieu of the normal 55. 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. Note: Dave found that none of the gaskets in his kit fit his carburetor. Another - You mentioned a bigger jet -- are they available? For a 1776cc engine with 009 distributor, 55 idle, X132.5 or X135 main, and air correct around 80Z should be close to the mark. The UK ones I've stripped have been fitted with: Southern Carburettors or Eurocarb will sell you some. Secure the fuel hose to the inlet nozzle on the carburetor with a new hose clamp. I also adjust my accelerator pump after getting it to idle good. Well, if the fuel/air mixture is too rich, the extra fuel will wash the film of oil off of your cylinders and wear out your pistons, cylinders, and rings quickly. Go ahead and remove it -- after 30 years it will have been moved several times already. almost all the way to the top.-the idle 'cut off' solenoid clicks repeatedly when tested. These plates provide restriction and also atomize the fuel/air mix better for greater fuel economy. That terminal on the coil is just a convenient place to obtain power to these components. There is also a 65 power jet there too) a X127.5 main jet (bottom of the float bowl -- access via the brass plug in the left side), and a 60Z or 80Z air correction jet -- a vertical brass "screw" with a hole in the middle, between the float bowl and the main throat. The proprietor of Aircooled.Net thinks the main jet is a size X130, and the idle jet is size 50.) Seller pays for return postage. Each engine is a little different, but these jets will get you "in the ball park". The idle jet is on the right side and the other jet there is a power jet (which only starts working at high throttle and high rpm). PRICES are subject to change without obligation. The Pilot Jet Valve (idle jet) would be the g55. But if you find a solid brass bolt, the main jet is further in the float chamber (later models) but still right in the back of it on the right-hand side. Another well respected and active VW carburettor rebuilder is TIM. Jetting was tweaked over the years for various carbs and territories. All information should be verified prior to use. Re: 34 PICT 3 Adjustment Woes. May 13, 2014 @ 5:57 am. Details. The air correction jet prevents the mixture going over-rich at high rpm (again, smaller numbers means richer for this jet). [3] The Volume Control Screw is the smaller of the two adjusting screws. Recommended sizes are given in this article. following diagram. It's a complex problem that faces ALL open throat style carburettors. 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. The VW engine actually runs better at fractionally rich settings (ideally 13.8:1 rather than 14.5:1 according to Bob Hoover). Could you help me with the jetting? 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. Special Instructions There is a trench or 'valley' across the bottom of the float bowl to the main jet on the other side. 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. 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. Dave bought a Pierburg model 34PICT/3 carburetor from Aircooled.Net, and none of the jets had the sizes stamped on them. 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. 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). Starts right up and runs great. This is what causes the visible rich condition, and confirms the need to increase the jet size. Basically, the emulsion tube changes the diameter and location of small holes in it's body. I have 4-5 I've collected over the years, and the smaller ones can be re-drilled to the larger sizes. If I can't iron it out with the high speed jet I'll start on the idle jet. **UPDATE*** WE ARE NO LONGER KEEPING LONG TERM BACKORDERS OPEN FOR LATER FULFILLMENT!! Golf Mk1 > Volkswagen Workshop Manuals > Power unit > 34 PICT, Keihin carburettor and ignition system > Mixture preparation carb. 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. The most common power jet size on all Solex carburettor versions is 65 (except for the H30/31 which usually has a smaller power jet - around 47.5). Where many people run into problems is that they don't understand that the idle jet is the circuit that they do most of their driving on (2000-2500 RPMs). We appreciate your continued support and understanding. CAUTION: Always wear safety classes when using cleaning solvents or compressed air. Carburetor-to-intake manifold gasket. So if you get a "too small" jet it's easy to drill out with the right sized drill, but if you get a "too large" jet it's not so easy. If you live at altitudes above 5000 feet, you also have to consider that, as high altitude results in the engine running rich (less oxygen in the air but the same fuel flow through the carburetor). But engines do differ a little, and the sizes above are "ball park" figures rather than definitive. Super Stock 34 PICT 3 (34-3) Carburetor, LIMITED PRODUCTION, 12V, Bocar. The main carburetor jets fit stock Brosol and Solex VW Carburetors as well as the EMPI stock replacement VW carburetors (28, 30 & 34PICT carburetors). 34 PICT-3 carb, SOLEX 34MM ; Fitment: Carburetor Fits For any 1600cc VW Air cooled Type 1 engines,such as: 1971-1979 Volkswagen Beetle, 1971-1979 Volkswagen Super Beetle, 1973-1974 Volkswagen Thing, 1971-1974 Volkswagen Karmann Ghia, 1967-1973 Volkswagen . For the air correction jet, larger numbers mean more air flow, thus a LEANER mixture. Once all together, retune the carbs (mixture and idle speeds) as per standard VW tuning methods. Show Quoted Text . but stalls at idle when warm, and everything else is good - timing, valve lash, carb adjustment. . 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. 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. For example, the X130 main jet is a tad rich for the vacuum dizzy at sea level, so if the car is to be operated at a high altitude it will be running very rich, and you might get a smoother engine and less exhaust soot with an X127.5 or even an X125 main jet (the "right" size for 5000 feet altitude). Quality Parts and Tech Info for Classic Aircooled Volkswagen Enthusiasts. 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. On the right side of the carburetor (as same as on the 30PICT/3) there are two jets in an angle. It would be interesting to try using one an adjustable main jet, but there are some dangers too ? Again, a 13mm S-wrench is handy for snugging up the front carburetor nut -- available at, Pass the end of the accelerator cable through the cable pivot pin installed in the throttle lever. I think the original idle jet was a 50, but the replacement jet orifices (orifii?) This carb is designed to remain compatible with SVDA distributors, and fits the stock air filter. The extra advance helps reduce the 009 flat spot just a little. 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. 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. Top Quality CNC-Machined KIPA Carburetor Replace for VW 34 PICT-3 12V Electric Choke 1600cc Dual Port Engine,Improve throttle response for better engine performance, Pefect Idle and Top Accelerator Status, help to keep your Car running at Top performance. The effect is clearly noticeable from 3000 RPM upwards (just under 60 mph), and probably a little lower than that. We can only give a guide here, as engine age, type of fuel, carburetor wear, etc. Notify me about replies to my post Reply V. . If it doesn't open you won't idle! The 34PICT normally has a X127.5 main and a 140Z or 170 air correction jet. valve - idle cut off (30pict-2,3) 5. plastic cap 26. plug - av x. fuel jet 6. spring - throttle return 27. Rob responded - Yes, that sounds like a rich mixture. Jetting With the Centrifugal-Advance (009) Distributor, Tuning the 009 Distributor/ If your solex 34 pict 3 starts and runs fine when cold. Soot will indicate the main jet is a little too large. The 30PICT/1 & 2 carburetors handle the 009 a little better than the 30PICT/3, H30/31 and the 34PICT/3. Location: Miami. In both cases, when running the 009 distributor, set the accelerator pump for maximum squirt. 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. It should not be possible to blow air through the valve while the needle is pressed lightly onto its seat. 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. 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. The adjustable jet would work with any of the Solex carburetors which have the jet mounted horizontally inside the carburetor. This will tell you if it's running rich or lean at speed and then you can set the air correction jet accordingly (smaller air correction means richer mixture - is delivers air so it works the opposite to a main jet. Be careful pulling it out -- it's about an inch long. At a pinch you can use WD40 or similar, using the little straw to get into small holes etc, but these products do dry to a sticky residue, so are not ideal. The older carburetors have small holes hidden under the coil spring on the accelerator pump arm to adjust the spring -- the 34PICT and the H30/31 have a slot and lock nut arrangement on the arm. 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. NOT EVERYONE WANTS DUAL CARBS! 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. Some tests to help you determine proper jetting. If you have a 009 distributor (no vacuum canister on the side), the main jet should be about X130 or X132.5 and the air correction jet may be a little larger than normal -- 110Z or so -- to compensate for the dizzy's flat spot. Volume control screw O-ring (18) We have sold thousands of Bocar carburetors, so when we decided to offer an upgraded carb, we chose to use the Bocar 34-3. If the jets are screw in to tight that will cause high idle. Once again, try the conservative approach first, then get richer only if you have to. 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. This is not correct. 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. . 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. But engine sizes have much more variation, 1200cc to 1300cc is about 8% more, 1300cc to 1500cc is nearly 14% more, and 1500cc to 1600cc is about 7% more. Actual product may differ in appearance. A 44 IDF would need a 55 idle jet, and a 48 IDF would need a 60 idle jet. Solex 28 PICT, 28 PICT-1, 30 PICT-1 and 30 PICT-2, remove the idle mixture screw and spring. Carburetor Reassembly The main jet can usually be removed without taking the top off the carburetor, but it's fiddly. There are a few fuels which have up to 85% ethanol in them (E85). Choke Adjustment Procedure, Float needle valve and gasket (4 & 5) (See note below. The only method of getting it exact is to run the car on a dynomometer with an exhaust gas analyser in the exhaust pipe. does anyone have a link to a graphic that explains where it is on the carb? We rely heavily on email as the most efficient and accurate way to serve our customers. Great for that SLEEPER LOOK! Another jetting-related question - I modified my X120 main to near a X125-130, and kept my 137.5Z air correction jets. This gasket sets the fuel height in the float bowl; erratic behavior may result if the gasket is not correct. Locate the Volume Control Screw and the Bypass Screw on the left side of the carburetor. We disassemble the carburetor, and bore the venturi to 28mm for more air! 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). In most cases you can just leave the power jet alone. Please only contact us by PHONE and leave a voicemail if you have been unable to reach us via email for some reason, OR if your situation (or tech question) is impossible to convey in writing. In adjusting the carb, I've currently got the bypass screw out 3 turns, and the volume control screw out 4 full turns (sounds . . Free shipping for many products! . If you're still looking lean, go to a 132.5. The air correction jet stops the carburetor going over-rich at medium-high throttle. Most carburetors come out of the box with a 55-60 idle jet. Others are upset by a backfiring, or smoke belching monster. The power jet only works at higher throttle positions and higher rpms. Please only continue if you are prepared to be PATIENT. The use of VW, Volkswagen and any model names and numbers is for the sole purpose of description of parts application. Some of the replacement carburetors (H30/31 and 30PICT/3 maybe???) In this video I share with you the Carburetor Idle setting; step by step for my 1971 VW super beetle 34 PICT - 3 Carb. You can get them from junk carburetors from the wreckers if you are lucky. SOLEX 34 PICT 3 Carburetor Adjustment Procedures. 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. The 34PICT/3 carburetor is usually used on 1600cc or larger engines. Jun 10, 2013 (Edited) cactu4r said: I've got a recently rebuilt 1600 DP, 34-pict-3, DVDA, and I am having the hardest time getting the engine to idle. And the second issue is the presence of Ethanol (alcohol) in gasolines. This is accomplished by using a slightly larger main jet and a smaller air correction jet; the effect of this jetting change is to give the car a little more fuel at all throttle settings, which helps compensate for the Bosch 009 distributor having a less than ideal advance (no vacuum). 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. Others might find that the 30 sized carburetor on a 1600cc engine works better with a larger X127.5 main jet. 2 of 2 people found the following review helpful. ; Replace Part Number: 98-1289-B, 113129031K.Dual Port Manifold only, Not for single port. Checking and adjusting cold idle speed =>page 22-53 Throttle valve positioner 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. Rob wrote in this regard - See our article on Reading Spark Plugs. The idle cut-off valve receives power from the positive (+) terminal on the coil (#15) -- see the schematic which shows this wiring arrangement. Our last contact with Keith was some years ago. We sincerely appreciate your patience while we are doing these site upgrades. Solex 34 pict 3 jet size. Contrast the Main Jet of the VW 105-1 for the '67 Beetle which would be120. You also set the accelerator pump for maximum stroke when using the 009. It's actually much easier to do if you remove the top of the carburetor and the float. body (5). 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. The idle jet is normally a little larger when used with the heavy bodied Type 2 and Karmann Ghias - in a Bug you usually use a 55, for a Type 2 or Karmann Ghia use a 60 or 65this gives you a little more power at low and medium speeds. So, I let it warm up, and set the timing to 32 degrees full advance. 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! The biggest problem I have with it was the fuel consumption. Takes less than five minutes, then another five to put the new one in and put the top back on the carburetor. Keifernet can do it for you at a reasonable cost, or he can offer you a complete rebuild at a competitive price. The three wires could each go up to fuse #12 individually, but that would be very inconvenient. Change the main first and do a plug read as above. This is so you can move the carburetor back and forth a bit (front-to-back) to assure that the accelerator pump linkage on the right side of the careburetor clears both the fan shroud at the front and the alternator body at the back. This jet helps mix the fuel when the throttle butterfly is part way open, and so if you make it too big, it will let in too much air, and the engine will hesitate because of that. Venturi size refers to the narrowest channel in the carburetor throat. following topics related to the 30 PICT/2 and 3 and 34 PICT/3 and 4 Here's the story: '68 bug with a ~'73 engine, 1600 dp, dual vac dizzy. Adjustment directions are given below. Regarding fuel consumption as a function of jet size -- The 1600cc Beetle should get about 10-12km/l (24-28mpg). 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 . This carburetor will NOT work well with cams with over 270 duration, (same as the stock 34-3 carb). You . The to start at sea level. 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.

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