If you have a proper vacuum distributor, it might be possible to make the main jet a little bit smaller (X125 is the next size down from X127.5), but this will not make very much difference in the fuel consumption. The 34 PICT-3 was used on the Volkswagen "Beetle" from 1971 until 1974. The air correction jet is also changeable. 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. Note: Do not soak the choke heating element, pump diaphragm, float, vacuum diaphragm, or any other rubber or plastic parts in carburetor solvent. Great for that SLEEPER LOOK! Discussion in 'Mech Tech' started by low_light_craig, Jun 9, 2017. low_light_craig. This means that the main jet is sized to the engine capacity, rather than the carburetor size, and X127.5 is the more common size for the 1600cc engine, rather than say the X125. This valve closes when the key is off, preventing "Run on". 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. It is very easy to check the idle cut-off valve to make sure it is functioning properly. May 13, 2014 @ 5:57 am. 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. A
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. . These are setup for 12V electrics, and include the idle shut off valve. I rebuilt the carb that was on it, as well as a. swap-meet spare, before installing the engine this spring. 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. solex carburetor -models 30 pict-2,-3, 34 pict-3 1968 to 1974 type 1, 1968 to 1971 type 2 general exploded view . 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. Carburetor Removal
Once again, try the conservative approach first, then get richer only if you have to. The 1600cc DP can flow more air than the 1600cc SP and smaller engines. 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. Then if you need a fatter idle go up to 57.5, then 60. The Power Fuel System Dispensing Nozzle for the VW 105-1 would be 0.50 with no check ball. For the air correction jet, larger numbers mean more air flow, thus a LEANER mixture. 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. Have a look at the size stamped on it too. Please only continue if you are prepared to be PATIENT. 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. Most carburetors come out of the box with a 55-60 idle jet. Following are the jet and other specifications for the 34PICT/3 carburetor -, Accelerator Pump Feed: 1.3 - 1.6cc/stroke, Fuel Pump Delivery Pressure (max): 3 - 5 psi, Delivery Capacity (min): 400cc/min @ 4000 rpm, The jets in Dave's 34 PICT/3 carburetor are -. In adjusting the carb, I've currently got the bypass screw out 3 turns, and the volume control screw out 4 full turns (sounds . 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). Once the jet is loose it sort of falls on it's side, so then I use the screwdriver to nudge the jet out along the trench to the plug hole in the side (rather than using needle-nose pliers). (Some of this material was adapted from John Connolly's article on How to Jet Your Carburetor.). following diagram. I'd go for a 130 main. Adjustment directions are given below. Many thanks, John!). Others might find that the 30 sized carburetor on a 1600cc engine works better with a larger X127.5 main jet. 55 idle is fine. Actual product may differ in appearance. SUPER-STOCK-34-3. Re: 34 PICT 3 Adjustment Woes. carburettor data 1124 cc models Venturi diameter 25 mm Main jet 127 5 Idle jet 48 Air correction jet 175 Emulsion tube EM Enrichment jet 50 . Note: Compressed air is really best if you have it. "Leaving it alone" is fine for a new carburettor but silly when the engines are all at least 30 years old and in different states of health. Rob wrote in this regard - See our article on Reading Spark Plugs. Some of the replacement carburetors (H30/31 and 30PICT/3 maybe???) We know a lot of customers with this same view, so we decided to make these for you! Or should I open what I have or rob from a newer model? It's a problem VW recognized very early on (since the aircooled engine has very hot heads and hot-spots were therefore more likely than in water cooled cars), so the fix was to add the cut-off solenoid to the carburetors. Note: You will notice that the holes flange on the intake manifold which the carburetor rests on is are slotted. . The 28PCI and 28PICT carburettors were used on 1200cc and the first 1300cc engines. 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. 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. Rob's note regarding modern fuels: There are two major issues with modern fuels. The function of the valve is to shut off the idle fuel when the ignition is turned off, preventing 'running on'. Soot will indicate the main jet is a little too large. Assuming a vacuum distributor, the 34PICT/3 carburetor is usually jetted with a X127.5 main jet, and 100Z -120Z air correction jet. 2-F7 emulsion tubes for the IDF. If your car is having a problem with spitting/sputtering/cracking, this is an indication of the fuel/air mixture being too LEAN. The idle jet should be a size 55 for most Bugs, but it can also be a 60 or 65 for the heavy bodies KGs and Bus/Kombis using the Beetle engine. All three of these jets can be changed. It this case you would definitely need to reduce the main jet size to say the size 122.5 or the 120. 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). If you don't have a compressor, talk to Santa Claus! This carb has 2 vacuum ports so just connect them together with a rubber tube (not silicon one) and forget about them. The speed of the engine (RPM) when it's doing this tells you which jet you need to change. 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. Following that is a listing of the parts, giving
valve - idle cut off (30pict-2,3) 5. plastic cap 26. plug - av x. fuel jet 6. spring - throttle return 27. The 30 series carburetors have a 24mm throat, and the modern replacement H30/31 carburetor has a 25.5mm throat. 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). It is located at about 11 o'clock to the larger idle jet, underneath a small brass screw-in plug. Note: Some people use a 13mm S-wrench (ring spanner) to remove the front nut. 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 main jet can usually be removed without taking the top off the carburetor, but it's fiddly. They are cheap enough. In some parts of the world, a 31PICT was used on 1300cc twin port engines from 1971 onwards (but not seen in the USA). You may have to get creative about how you attach so many wires to the single terminal on the coil. It is still UNCERTAIN, but we may re-open a substantially downsized version of our store again in the Spring of 2023. (Adapted from John Connolly's article on How to Jet Your Carburetor. 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. I couldn't find it in any book. Then tighten further according to the chart. Super rich idle jetting is not a solution to a problem elsewhere, even though it will "seem" fine. The following topics are discussed in this article -. A loss of power is the result -- about 58hp instead of 60hp. In most cases we are able to honor advertised price, but in the RARE case a substantial price increase occurs, you would be notified and given the option to cancel. 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. You can email to cancel un-shipped/un-paid items at any time as long as they are not direct-shipped, special order or made/machined-to-order. Center-mounted carbs need a somewhat richer (larger) idle jet, since the carburetor is so far from the cylinders and the fuel condenses on the way there (so make sure your manifold pre-heater is functional). 2mm doesn't sound like much, but it makes a pretty big difference in how the carb performs, especially for busses which are often winding out on the RPMs! 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. You can also get detonation (pinging/knocking) if the engine gets too hot. Brosol/Solex Idle Jets .50. Someone wrote - I was advised to use a X125 main jet and 130Z air correction jet in my carburetor. VW set up a vacuum advance distributor, and the stock jetting in a 34 pict 3 for a 100% stock engine. 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). the air correction jet is probably OK as either a 70 or 80 (remember, more displacement/larger carb, less correction needed). 60 day return. It worked quite well, although the idle wasn't very accurate. 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. The exhaust system peashooters started turning black inside as soon as I put the larger jet in. Find many great new & used options and get the best deals for Size 45 Pump Tip for Weber Dcoe Dcom Dco Carburetor Jet 76801.45 at the best online prices at eBay! I also have a stock carb rack but it appears to have water damage and one or more carb is seized. Peugeot 205 Manual . Show Quoted Text . Nomenclature
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