Dave bought a Pierburg model 34PICT/3 carburetor from Aircooled.Net, and none of the jets had the sizes stamped on them. 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 angled one (points slightly towards the rear of the car) is the idle jet. There are three (or four) removable jets. Basically, the emulsion tube changes the diameter and location of small holes in it's body. (Adapted from John Connolly's article on How to Jet Your Carburetor. 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. At the beginning I started to use a Solex 30 PICT-2. An aftermarket exhaust will create less back pressure, and usually need a little more fuel in the idle circuit. 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 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. The power jet counters the leaner condition at higher rpms, richening the mixture back into balance again. A 44 IDF would need a 55 idle jet, and a 48 IDF would need a 60 idle jet. I have main jets: X117.5 and X127.5 and as far as I remember currently in the carburetor is a X125. Volume control screw O-ring (18) The old one for a pattern and a sharp hobby knife or box cutter works well. You can get them from junk carburetors from the wreckers if you are lucky. The air correction jet has to be the right size for the same reason. Carburetor Installation. Dave replaced the main, idle and air correction jets so he knew what he had. IDLE JET .55 .65 .60 (d) VENTURII 40mm . Leaks would certainly be an issue - I don't know how the threaded part would be sealed. Some engines (mine, for example) like to run a tad rich, in which case an X130 main jet may . EMPI Performance Products Pict-3 34 Direct replacement for the original Solex 34PICT3 - comes with 70 Air Jet - 127.5 Main Jet - 55 Idle Jet SO-100 $ 28.62 Solex Pict-3 28/30/31/34 Rebuild kit G1134 $ 3.25 Gasket - Flange Gasket - ID 1.540 98-1288-B $ 189.95 . (See the discussion of the air correction jet above.). 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. Rob responded - A X120 main jet would make it run leaner, and it sounds like it is too lean already. On the /3 and /4 carburetors - it looks like a bolt with a tiny silver plug in the center. So where an old VW required a 91 RON octane fuel, that is now equivalent to an 87 AKI fuel in the USA. All products purchased should be inspected, measured, cleaned and properly assembled prior to installation. All information should be verified prior to use. It would be interesting to try using one an adjustable main jet, but there are some dangers too ? The 34 PICT-3 was used on the Volkswagen "Beetle" from 1971 until 1974. Then remove a spark plug and read it (see our Spark Plug Reading Guide). by vwlover77 Fri May 05, 2017 6:58 pm. 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 start at sea level. There are a few fuels which have up to 85% ethanol in them (E85). On the H303/1 it is often oversized too - a 65, used to stop the engine stalling at low rpm as the main jet supplied with these is often VERY lean 117.5 or 120. If you have a significantly larger idle jet (e.g., 70 or so), John Connolly recommends going down until you can not get a good engine response with the mixture screws anymore. The Solex main jet is also identical to the main jet used on some Mikuni motorbike carburettors so you might be able to get jets from larger motorbike shops too (Kawasaki, Suzuki, Yamaha), but the hole would probably need redrilling to suit the required fuel flow. 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. Setting the idle screws (B): Tighten the screw until it touches the carburetor lever. 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. **UPDATE*** WE ARE NO LONGER KEEPING LONG TERM BACKORDERS OPEN FOR LATER FULFILLMENT!! Email care allows us to provide important service detail that can be later referenced by both the customer and our care staff. The three wires could each go up to fuse #12 individually, but that would be very inconvenient. 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. can find them - rare!). What you are mainly looking for is the condition of the carburetor. Idle Shut Off Valve, 34-3, 34-4, and 34 PDSIT 2/3 Carburetors, 049-129-412C Is the valve on the side of the carburetor that provides air to the idle circuit. It should not need to be bigger than that with a vacuum distributor (009 distributors need richer mixtures). Orders are processed in the order that they are received and order fulfillment time varies. $7.99 . We ONLY charge for items that are available to be shipped in a timely or reasonably reliable timeframe. See our Carburetor Overhaul Procedure. It's possible to develop partial blockage in one or more jets. 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. I also adjust my accelerator pump after getting it to idle good. Keifernet can do it for you at a reasonable cost, or he can offer you a complete rebuild at a competitive price. I think the original idle jet was a 50, but the replacement jet orifices (orifii?) Notify me about replies to my post Reply V. . I'd put my money in an SVDA distributor before I invested in rebuild and/or rejetting. Once all together, retune the carbs (mixture and idle speeds) as per standard VW tuning methods. mains: 120, 130, 135, 145. air jets: 160, 170, 180, 185. 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! Rob notes -- I have a 1500cc single port engine with it's original 30PICT/2 carburetor. Lightly lubricate the choke valve shaft and throttle valve shaft with engine oil and the external linkage with molybdenum grease. I would think you would need a .55mm-.60mm idle jet, and a .60 pump jet. all make a difference in how our old engines run, so you might need to experiment a little. Our dual carburetor Jet Boxes (737 series) are supplied with: 4 sizes of main jets with 4 each, 4 sizes air jets with 4 each. 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 . The try the same test at a higher speed - a steady 55-60mph. Just start off with a larger than normal size (150 maybe) and use the screw to increase/decrease the actual hole size. 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. 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. So be sure to remove the gasket and store it carefully. 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. Turn the ignition on (but do not start the engine). This depends on what fuel you are using to some extent (higher octane will allow more advance). 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). Try to use the leanest main jet you can -- too rich will only result in the cylinder oil film being diluted more, and this means higher cylinder wear. ). 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 it doesn't open you won't idle! 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. Show Quoted Text . I haven't run enough through the tank to get a real idea about consumption yet, but since I don't notice any huge difference in performance I'll probably be going back to the X125 soon. If it takes 4 1/2 to 6 turns to peak, go up a size or (1/2 size if you. Air correction jets are harder to find. Checking and adjusting cold idle speed =>page 22-53 Throttle valve positioner and jet > size. I'd avoid Chinese stuff on eBay. So how do you know which to use? Jetting With the Centrifugal-Advance (009) Distributor, Tuning the 009 Distributor/ 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. Screw it in GENTLY until it bottoms. SOLEX 34 PICT 3 Carburetor Adjustment Procedures. Venturi Size. Another question - The car runs terrible but it runs. ; Replace Part Number: 98-1289-B, 113129031K.Dual Port Manifold only, Not for single port. I have EMPI 34 pict 3 on GL1100 55 jet 130 jet idles 1000-1100. PRODUCT AVAILABILITY can vary and short-term backorders are common. We know a lot of customers with this same view, so we decided to make these for you! Pass the end of the accelerator cable through the cable pivot pin installed in the throttle lever. 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. Rob responded - If you still have a vacuum distributor - yes. Then video is intended as an example.. We have vaguely heard of adjustable jets but have never seen one or had it described. 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? Location: Miami. The exhaust system peashooters started turning black inside as soon as I put the larger jet in. 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. If you install a single carb on GL (34/3 PICT) always keep in mind the following: 1. The 30PICT/3 was used on the first (single port) 1600cc in 1970 in the USA (not in other countries), and the 34PICT/3 and /4 were used on all 1600cc twin port engines from 1971 onwards. 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). The air correction jet affects mostly the high rpm -- not much effect on low-middle rpm). Another - You mentioned a bigger jet -- are they available? Disconnect the electrical lead from the valve, then touch it to the connector again. The stock carb has a 26mm venturi. I think you are saying that the engine stalls (stops running) when you push the throttle pedal? Also if you still can't get a slow idle loose the jet a little on the other side of carb were the bypass screw is. The 30PICT/3 and the H30/31 carburetors came with size X112 main (super lean), size 65 idle, and size 125Z air correction jets, which made them very difficult to tune. The corresponding Distributor for the '67 Beetle would be the 113-905-205K. The fuel screw setting at idle trims the pilot fuel, and considering the fuel screw ends up at 1.5/1.75, the 1/8 throttle position (all 100% pilot flow) will be rich. If the valve sticks in the open position, the idle fuel circuit will remain open, so if the engine is still turning it will still draw fuel through the idle jet, resulting in running on if there is a hot spot in one or more cylinders. Aircooled.Net, Inc. is in no way affiliated or associated with Volkswagen AG or Volkswagen ("VW") of America. If it still seems hot, go to 127.5. 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. 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. I've been running my '68 Bug with the X127.5 main jet in the smaller carburetor, and he's running a tad rich. Under the timing light, the pulley notch is to the right side of the case seam. Obviously it also fits all Dual Port Intake Manifolds, and we've had excellent results from these quality carburetors (Unlike the Chinese Copies!!!). 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. 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). I don't think you'd honestly notice the difference. does anyone have a link to a graphic that explains where it is on the carb? Brosol/Solex Idle Jets .40. Air correction 75 to 125 and these are changed. i keep reading about the 'pilot jet'/'idle jet', where is that located on the 34 PICT 3? 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. MSRP Price: $9.11 You Save 12%. The carburetor has a 55 idle, X125 main and 125 air correction jet. Solex 34 pict 3 jet size. You . Starts right up and runs great. The 34PICT normally has a X127.5 main and a 140Z or 170 air correction jet. A detailed question: I have a Type 2 Bus, with a 1600cc single-port engine. See details. Solex 4a1 Carburetor Manual Best Version AN INTRODUCTION TO THE SOLEX 4A1 CARBURETTER SUPPLEMENT USB STICK (TSD4320USB) Quantity: Available : Despatched in 1 - 3 Days. Unscrew this bolt and look at it -- if there is a jet screwed into the bolt (older models), you can deal with it in hand, so to speak. I have a 52.5 idle jet in it, so it took about 4 1/2 turns to get max rpm ( thru a tach on my timing light). A sooty plug means the idle jet might be a little large. 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. I've never had to do this so don't even know if it would work well. 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. Perform the Idle Adjustment and Timing procedures. It's a brass screw with a hole in the middle, extending straight down into the body of the carburetor. I'd go for a 130 main. Some of you may be using this Carburetor. 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). There is a Mexican Solex 30 Pict-1 replacement Carburetor. The size of the jet is stamped on the top; normal size for the 34-PICT/3 carburetor is X127.5 (1.275mm diameter hole). Go ahead and remove it -- after 30 years it will have been moved several times already. 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. But we continue to endeavor to answer email inquiries as best we can. 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. You can also get detonation (pinging/knocking) if the engine gets too hot. 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. Do not allow cleaning solvent to come in contact with skin. 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). 21.00 (Excl VAT) 25.20 (Incl . 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).
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