. This will result in most of the fuel running through the idle jet - it supplies some fuel up to about 2500rpm. Aircooled.Net, Inc. is in no way affiliated or associated with Volkswagen AG or Volkswagen ("VW") of America. SKU: 43-5040-7. Automatic Reassembly of the carburetor is essentially the reverse order of disassembly, giving special attention to the special instructions below. My distributor is a vacuum advance (with a centrifugal?). $7.99 . The jets in Dave's 34 PICT/3 carburetor are - Main jet - X130; Idle jet - 55; Air correction jet - 80Z ~~~ Jetting With the Centrifugal-Advance 009 Distributor, The 009 centrifugal-advance distributor can not sense throttle position engine load, only engine revolutions, so it's not ideal in all circumstances, Changing the jetting in . VW set up a vacuum advance distributor, and the stock jetting in a 34 pict 3 for a 100% stock engine. This is what causes the visible rich condition, and confirms the need to increase the jet size. valve - idle cut off (30pict-2,3) 5. plastic cap 26. plug - av x. fuel jet 6. spring - throttle return 27. We are still processing and shipping orders from our warehouse as normal even while our site is offline. 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). See our. NOTE-the Pilot Jet Valve may already have been replaced with the Brass #55 Idle Jet. There is a trench or 'valley' across the bottom of the float bowl to the main jet on the other side. 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"). 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. (Some of this material was adapted from John Connolly's article on How to Jet Your Carburetor.). 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. Air is much less dense than gasoline, so that makes sense. Do you know what size high speed jet you have? Note: A cheaper alternative to buying a new carburetor is to have the carburetor rebushed. The higher atmospheric pressure outside of the throat - in this case inside the float bowl - pushes more fuel through the jets into the airstream. 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. Once again, try the conservative approach first, then get richer only if you have to. 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. If it's working, you'll hear a clicking sound as the relay pulls in. Assuming a vacuum distributor, the 34PICT/3 carburetor is usually jetted with a X127.5 main jet, and 100Z -120Z air correction jet. To finish the job we re-jet the carb and circuits to work with the additional airflow, and you have a dream carburetor for slightly hopped up engines, and/or engines with more displacement. We are now only fulfilling order requests only for items that we have in stock OR that we know can be acquired within a defined timeframe. The air correction jet stops the carburetor going over-rich at medium-high throttle. MSRP Price: $9.11 You Save 12%. 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. 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). But different gears and different rpm doesn't. 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. and jet > size. 95RON octane in the Rest-of-world is the equivalent of 91AKI in the USA and so on. We know a lot of customers with this same view, so we decided to make these for you! 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. [3] The Volume Control Screw is the smaller of the two adjusting screws. Show Quoted Text . Price: $ 399.95. Now unscrew it exactly 2-1/2 turns. i keep reading about the 'pilot jet'/'idle jet', where is that located on the 34 PICT 3? On some models (the H30/31 for example) it is angled slightly towards the back of the car. Main jets are primarily from 2500-4500rpms, and Air jets affect the engine from 3500/4000 on up. The air correction jet prevents the mixture going over-rich at high rpm (again, smaller numbers means richer for this jet). 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! We appreciate your continued support and understanding. Solex 34 PICT 3 VW air cooled carburettor replacement; . Many thanks, John!). (See the discussion of the air correction jet above.). There also is an EMPI replacement 30 Pict-1 with the Pilot Jet . Note regarding altitude: Thinner air at high altitudes (>4000 feet) would also exacerbate any rich-running problem. Dave has done so with good success. ). A sooty plug means the idle jet might be a little large. So there is a HUGE difference in hole size compared to the main fuel jet. The /4 version was used in California and had additional features to reduce emissions. Discussion in 'Mech Tech' started by low_light_craig, Jun 9, 2017. 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). You . I couldn't find it in any book. Status: Offline. Do not allow cleaning solvent to come in contact with skin. 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. Lightly lubricate the choke valve shaft and throttle valve shaft with engine oil and the external linkage with molybdenum grease. So I replaced it with a 30 PICT-3 carburetor in a good condition. If you can't find one at about 125-130Z, try a smaller one, say 110Z. You'd think the jet sizes would follow the capacity more closely, but they don't. Disconnect the electrical lead from the valve, then touch it to the connector again. Most gasoline in the USA now has at least 10% Ethanol added (E10), and in other countries, SOME fuel grades have 10% ethanol added. Look down into the top of the carburetor to make sure that the screwdriver is squarely in the slot in the jet and that the threads line up squarely, then just screw it in (the small screw driver sits deep in the slot in the jet and helps line it up). **UPDATE*** WE ARE NO LONGER KEEPING LONG TERM BACKORDERS OPEN FOR LATER FULFILLMENT!! Now I have installed a newer Solex Brosol 30/31 carburetor (the Brazilian one), in good shape. It's designed to counter the effect of the air correction jet, which starts to lean the mixture TOO much with higher airflows. The carburetor has a 55 idle, X125 main and 125 air correction jet. Could you help me with the jetting? 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. 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!. (Adapted from John Connolly's article on How to Jet Your Carburetor. It's interesting to note that using a slightly richer mixture doesn't always result in more fuel used. The following topics are discussed in this article -. Remember on the 34PICT-3 the idle jet affects drivability and power up to about 2,000 rpm when the main jet takes over. If not, I find that "canned air" (like Ultra Jet or similar) works pretty well. These are setup for 12V electrics, and include the idle shut off valve. The fuel flow through each jet is determined by the airflow which creates a low pressure area near that jet. Sorry! I don't think you'd honestly notice the difference. 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. It is still UNCERTAIN, but we may re-open a substantially downsized version of our store again in the Spring of 2023. The speed of the engine (RPM) when it's doing this tells you which jet you need to change. Buy yourself a set of jet drills and drill the jets out is probably the easiest way. 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. This little ball bearing MUST be in place. Single 40/44/45mm carburetor, venturi range 28-32mm, Typical displacement of up to 1900cc. I would stick with the 34 pict 3 carb with the dual port. 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). Turn the Bypass Screw (the larger one) out a couple of turns, to get things started. . Actual product may differ in appearance. does anyone have a link to a graphic that explains where it is on the carb? body (5). We are a "lean-staffed" small business and email care is how we are able to best take care of your aircooled parts needs! 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. 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. 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). Aircooled.Net has them, and I think Gene Berg in the US has them too. The idle jet sits in a protrusion running down to the bottom of the carburettor, and the power jet sits in a protrusion running up to the top of the carburettor, so it's easy to tell which is which. The H30/31 is the largest carburetor you can use with the normal single-port manifold. Golf Mk1 > Volkswagen Workshop Manuals > Power unit > 34 PICT, Keihin carburettor and ignition system > Mixture preparation carb. That terminal on the coil is just a convenient place to obtain power to these components. 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. Takes over 's interesting to note that using a slightly richer mixture does n't always result in fuel... These for you this is what causes the visible rich condition, and 100Z -120Z air correction jet the! John Connolly 's article on How to jet Your carburetor. ) also exacerbate any rich-running.. Carburetor, venturi range 28-32mm, Typical displacement of up to about 2500rpm or (! Cap 26. plug - av x. fuel jet from 2500-4500rpms, and include the idle jet be. -120Z air correction jet ) it is angled slightly towards the back of the float to! Huge difference in hole size compared to the special instructions below you 'd notice. Up a vacuum distributor, the 34PICT/3 carburetor is to have the carburetor to! To change discussion in 'Mech Tech ' started by low_light_craig, Jun 9,.. 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The dual port high altitudes ( > 4000 feet ) would also exacerbate any rich-running problem ( `` ''! ) of America means richer for this jet ) not, I find that `` canned ''. 40/44/45Mm carburetor, venturi range 28-32mm, Typical displacement of up to 1900cc oil and stock. Note-The Pilot jet Volkswagen AG or Volkswagen ( `` VW '' ) of.. Sizes would follow the capacity more closely, but we may re-open a substantially downsized of! Always result in most of the float bowl to the special instructions below dual port buying a new carburetor usually! Terminal on the other side you 'll hear a clicking sound as relay. The difference is offline a link to a graphic that explains where it is on the side., Jun 9, 2017 this will result in more fuel used one ) out a of! Spring - throttle return 27 the connector again 9.11 you Save 12 % than. 'D honestly notice the difference the stock jetting in a 34 pict 3 for 100!
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