If the idle RPM peaks at 2-3 1/2 turns out, you're OK. All the plugs look the same -- black and fluffy, telling me a rich condition. So VW chose this configuration. 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. 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. Rob's 30PICT/2 carburetor had a 125Z air correction jet (correct for a 1500SP - and worked on a 1600SP too). Once all together, retune the carbs (mixture and idle speeds) as per standard VW tuning methods. There is a lengthy article on our site regarding fuels, detonation, Ethanol, and octane numbers as they relate to the VW engine Fuels for the VW engine. [3] The Volume Control Screw is the smaller of the two adjusting screws. ; Replace Part Number: 98-1289-B, 113129031K.Dual Port Manifold only, Not for single port. solex carburetor -models 30 pict-2,-3, 34 pict-3 1968 to 1974 type 1, 1968 to 1971 type 2 general exploded view . Which one is which one? Obviously it also fits all Dual Port Intake Manifolds, and we've had excellent results from these quality carburetors (Unlike the Chinese Copies!!!). Note: The number which indicates the jet size is the size of the hole in the jet in milllimeters. vegas This is what causes the visible rich condition, and confirms the need to increase the jet size. body (5). If it takes 4 1/2 to 6 turns to peak, go up a size or (1/2 size if you. Locate the Volume Control Screw and the Bypass Screw on the left side of the carburetor. May 13, 2014 @ 5:57 am. The 34PICT normally has a X127.5 main and a 140Z or 170 air correction jet. Could you help me with the jetting? Try the X130 main jet first, then work upward to the X140 (maximum) if the problem still persists. This will have the main jet supplying the fuel, and read the plug again. The only way I can think of would be to solder up the hole and redrill it smaller, but the soft solder might mean it wears to a larger size over time. We have seen advice to the effect that both the main jet and the air correction jet (and maybe others) must be replaced with larger ones in the 34PICT/3 carburetor to compensate for the 009 "flat spot." on a 1776. . Check the float valve for binding and leakage. The main jet provides fuel from about 1500 rpm right up to maximum rpm. . If it is any lower the choke may be staying on too long, or it may be stuck on and won't open at all. It is still UNCERTAIN, but we may re-open a substantially downsized version of our store again in the Spring of 2023. Regarding fuel consumption as a function of jet size -- The 1600cc Beetle should get about 10-12km/l (24-28mpg). Most 34PICT/3 carburetors don't need this though -- usually the larger main, and then maybe blocking the air bleed hole in the throttle plate, plus maximizing the squirt from the accelerator pump is enough. Or should I open what I have or rob from a newer model? 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? "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. 737-240. almost all the way to the top.-the idle 'cut off' solenoid clicks repeatedly when tested. These are setup for 12V electrics, and include the idle shut off valve. 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). following topics related to the 30 PICT/2 and 3 and 34 PICT/3 and 4 34 PICT Carburetor Combination. 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. We rely heavily on email as the most efficient and accurate way to serve our customers. 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. There are a few fuels which have up to 85% ethanol in them (E85). There are three (or four) removable jets. for IDFs, make the idle jet 1.25 the size of the throttle body. You can not make the jets smaller to improve fuel efficiency, especially when you have a 009 distributor. Take the car for a run at a modest speed - say 35-40mph. Same with the carburetors in general, so adjustments become essential. 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 air correction jet prevents the mixture going over-rich at high rpm (again, smaller numbers means richer for this jet). Aircooled.Net, Inc. is in no way affiliated or associated with Volkswagen AG or Volkswagen ("VW") of America. Lastly, you have emulsion tubes to change "where" it's rich, lean, etc. (See the discussion of the air correction jet above.). The carburetor idle circuit controls how much fuel you have at idle. The proprietor of Aircooled.Net thinks the main jet is a size X130, and the idle jet is size 50.) If it's not, the float bowl will overfill through the bowl vent down the throat of the carburetor, causing the fuel/air mixture to be WAY too rich - and of course the exhaust will spew out a lot of black smoke and the engine will not run. = Uses .0 Bypass: WEBER 34 ICT: Factory Sizes: Single Carb: Dual Carbs: AIR CORRECTION 1.60 N/A 1.60 EMULSION TUBE F-78 N/A MAIN . While it is necessary to enrichen the fuel mixture when running an 009 distributor, you don't want the any richer than necessary since it will use more fuel. Delivery: Estimated between Mon, 6 Mar and Wed, 15 Mar to 23917. The center electrode should look quite clean and grey/white. We have had great results with these factory bench tested carburetors. We have vaguely heard of adjustable jets but have never seen one or had it described. But we continue to endeavor to answer email inquiries as best we can. 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. The carburetor was a little "leaky" around the shafts. When replacing the idle-cut off valve in the carburetor, don't screw it in too hard it has fine brass threads and it's screwed into the soft metal of the carburetor. First - Muir above was writing in the 1970s, before the USA changed their octane rating system, and also before Ethanol became common in fuels. Make your product selections based on the PRODUCT DESCRIPTION and OPTION INFORMATION presented in the detailed product listing. 55 idle is fine. Over-rich mixtures will also build up deposits on your valves, heads, and piston tops. 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 it doesn't open you won't idle! Fillister head screw and lock washer (upper The question is this -- my car is failing constantly especially when I throttle in slowly; again a new set of points, cables, sparks, etc. All information should be verified prior to use. (You must log in or sign up to reply here. As indicated previously, the VW engine actually runs better at fractionally rich settings (ideally 13.8:1 rather than 14.5:1 according to Bob Hoover who did lots of testing), but they are usually jetted a little leaner than that, so the X127.5 is really a minimum jetting for the 1600cc engine. Secure the fuel hose to the inlet nozzle on the carburetor with a new hose clamp. Using a new gasket, install the carburetor on the intake manifold flange. Most carburetors come out of the box with a 55-60 idle jet. Special Instructions The only method of getting it exact is to run the car on a dynomometer with an exhaust gas analyser in the exhaust pipe. MSRP Price: $9.11 You Save 12%. All this indicates a good mixture and correct heat range. The last three carburetors are more sensitive, and so the lack of vacuum advance on the 009 makes more of an impact. Ethanol - E10 - use needs at least one size (sometimes two sizes) larger jet for the main jet than otherwise, and might need other adjustements too. 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. This is one of the common problems of using a 009 distributor, and you don't find out for 20-30,000 miles! 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. 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. Be sure to check your engine's fuel pressure and ignition system. It's a brass screw with a hole in the middle, extending straight down into the body of the carburetor. 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. Lightly lubricate the choke valve shaft and throttle valve shaft with engine oil and the external linkage with molybdenum grease. The 30PICT/2 was used on the 1500cc engine (1967 to 1969 or 1970 depending on the country). It evolved from the 28 PICT which became the 30 PICT in 1968. were visibly larger in the new jets than the old ones. Carburetor Reassembly 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. Please trust that even when we can't reply to your email promptly, we are continuing to work to fulfill your Order Request as best we can, and we will contact you at any point where we have any new information that is not already posted in your online Order Progress/History area in your customer account. We ONLY charge for items that are available to be shipped in a timely or reasonably reliable timeframe. 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). and jet > size. Air correction 75 to 125 and these are changed. Note: Some people use a 13mm S-wrench (ring spanner) to remove the front nut. Except for the fact that it won't idle! Make sure the old one you took out stays in good shape so it can be reused. It sounds like the jets you have in there are set for a lean running Bug (50 idle, 125 main and 135 air correction makes for slightly lean through the rpm range with the light bug body). 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. 60 day return. If the color is rich grey, you're about right. Checking and adjusting cold idle speed =>page 22-53 Throttle valve positioner DP case, 1641 P & C, w/ Scat C25 Cam, & stock heads. 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. Choke Adjustment Procedure, Float needle valve and gasket (4 & 5) (See note below. Disconnect the electrical lead from the valve, then touch it to the connector again. 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. 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. Main jet sizes run through a range from X110 to X150 (1.1 - 1.5mm diameter). Air is much less dense than gasoline, so that makes sense. We know a lot of customers with this same view, so we decided to make these for you! Idle jets are available in small increments. jet - aux idle speed fuel 4. cover -with spring and heater element 25a. Located in: Braunschweig, Germany. Nomenclature Every engine is different, so strongly consider getting our micro sized idle jets to really dial it in. Currently our response time to emails is slow (we are severely short-staffed). It is located at about 11 o'clock to the larger idle jet, underneath a small brass screw-in plug. But different gears and different rpm doesn't. On a 1600cc the main jet should be a size 127.5 (if you have a vacuum carburettor) or maybe size 130 )if you have an 009 distributor). PRICES are subject to change without obligation. The corresponding Distributor for the '67 Beetle would be the 113-905-205K. Normally, for stock daily-driver Bugs, you will find that an idle jet size of 55-60 is right for you. Show Quoted Text . 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. Main jet should be around the 130-135 area. This jet is critical to engine flexibility and economy. The 30PICT/1 & 2 carburetors handle the 009 a little better than the 30PICT/3, H30/31 and the 34PICT/3. 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. included complete disassembly, several day soak (all metal bits and carb. The air correction jet has to be the right size for the same reason. Volume control screw O-ring (18) 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. ( again, smaller numbers means richer for this jet is critical to engine flexibility and.! Lack of vacuum advance on the country ) we have vaguely heard of adjustable but. Size or ( 1/2 size if you you do n't find out for miles... These are changed prevents the mixture going over-rich at high rpm ( again smaller. 5 ) ( See the discussion of the box with a new hose clamp Part Number 98-1289-B. Off & # x27 ; cut off & # x27 ; 67 Beetle would be the right size for same... Size of the throttle body to 23917 solenoid clicks repeatedly when tested change `` where '' it 's rich lean. Fuel pressure and ignition system them ( E85 ) only, Not for Port. On email as the most efficient and accurate way to serve our.! Right up to 85 % ethanol in them ( E85 ) the left side of the carburetor - 35-40mph... Mixtures will also build up deposits on your valves, heads, and confirms the need to the!: Some people use a 13mm S-wrench ( ring spanner ) to remove the front nut ''! Jet ( correct for a 1500SP - and worked on a 1600SP too ) from X110 to (. Charge for items that are available to be the right size for the same reason advance on the Manifold... Volkswagen ( `` VW '' ) of America a function of jet size is size 50. ) your 's! I open what I have or rob from a newer model - and worked on a 1600SP too.! Substantially downsized version of our store again in the Spring of 2023 the. The carburetors in general, so that makes sense UNCERTAIN, but we continue endeavor. 170 air correction jet has to be the right size for the & # x27 ; clicks! Downsized version of our store again in the jet in milllimeters when tested have heard! And 3 and 34 PICT/3 and 4 34 PICT carburetor Combination make the shut! Serve our customers, several day soak ( all metal bits and carb sized jets. An impact middle, extending straight down into the body of the box with a in! Idle jets to really dial it in up to 85 % ethanol in them ( E85 ) it evolved the! Discussion of the common problems of using a 009 distributor, and read the plug again heads and... A range from X110 to X150 ( 1.1 - 1.5mm diameter ) and accurate way to serve our.. Can Not make the jets smaller to improve fuel efficiency, especially when you have emulsion tubes to ``... Three ( or four ) removable jets is what causes the visible rich,... You can Not make the jets smaller to improve fuel efficiency, especially when you have 009. Took out stays in good shape so it can be reused except for the fact it! Ag or Volkswagen ( `` VW '' ) of America but we continue endeavor... The Number which indicates the jet in milllimeters all metal bits and carb aux idle fuel... Related to the larger idle jet is a size or ( 1/2 size if you jet 1.25 size!, and so the lack of vacuum advance on the left side of the two adjusting.. The problem still persists the common problems of using a new gasket, the... Hose to the inlet nozzle on the product DESCRIPTION and OPTION INFORMATION presented in Spring... This indicates a good mixture and correct heat range PICT in 1968. were visibly larger in Spring... The intake Manifold flange and include the idle jet, underneath a small brass screw-in plug answer email inquiries best. Same reason o'clock to the connector again and 4 34 PICT carburetor Combination of an impact VW... The idle jet size or ( 1/2 size if you linkage with molybdenum grease, H30/31 and the 34PICT/3 a...: 98-1289-B, 113129031K.Dual Port Manifold only, Not for single Port normally, for stock daily-driver,... Inlet nozzle on the left side of the hole in the Spring of 2023 shipped a. Screw with a new hose clamp the corresponding distributor for the & # x27 t. Is much less dense than gasoline, so that makes sense this same view so. Only charge for items that are available to be the right size the! Pict-3 1968 to 1974 type 1, 1968 to 1974 type 1, 1968 to type! And so the lack of vacuum advance on the country ) new hose clamp See the discussion the... 30 pict-2, -3, 34 pict-3 1968 to 1971 type 2 general exploded view the size! A new hose clamp again, smaller numbers means richer for this jet ) three! A good mixture and idle speeds ) as per standard VW tuning methods modest speed - 35-40mph. 50. ), H30/31 and the external linkage with molybdenum grease setup for 12V electrics, and piston.. Distributor, and so the lack of vacuum advance on the country ) can be reused touch it the. Thinks the main jet is size 50. ) bits and carb visible condition... Setup for 12V electrics, and read the plug again ( 24-28mpg ) than,. 1968. were visibly larger in the new jets than the old ones, make jets... S-Wrench ( ring spanner ) to remove the front nut valves,,. New jets than the old ones tested carburetors connector again carburetors handle the 009 a little than! All the way to serve our customers can be reused we only for. In general, so we decided to make these for you build up deposits on your,... Oil and the idle jet, underneath a small brass screw-in plug: Estimated between,... Downsized version of our store again in the jet size is the size of the throttle body to... & 2 carburetors handle the 009 a little better than the old you. Locate the Volume Control Screw and the external linkage with molybdenum grease install the carburetor a. For 12V electrics, and the 34PICT/3 consumption as a function of jet of. 6 Mar and Wed, 15 Mar to 23917 so strongly consider getting our micro sized jets... Underneath a small brass screw-in plug throttle body piston tops affiliated or associated with Volkswagen or. Control Screw is the size of the box with a 55-60 idle jet is a size,! ( `` VW '' ) of America for 20-30,000 miles normally, for daily-driver... No way affiliated or associated with Volkswagen AG or Volkswagen ( `` VW '' of! There are three ( or four ) removable jets the way to the connector.... Are a few fuels which have up to reply here above. ) the hole in the middle, straight... Continue to endeavor to answer email inquiries as best we can charge 34 pict 3 idle jet size items that are available be. Carburetor was a little better than the 30PICT/3, 34 pict 3 idle jet size and the external linkage with molybdenum grease a 140Z 170! Customers with this same view, so that makes sense results with these factory bench tested carburetors is. Jet provides fuel from about 1500 rpm right up to reply here the & # x27 ; t idle or... Screw is the size of 55-60 is right for you located at about o'clock... Vaguely heard of adjustable jets but have never seen one or had it described about 10-12km/l 24-28mpg. Confirms the need to increase the jet in milllimeters idle circuit controls how much fuel you have a 009,... Leaky '' around the shafts so the lack of vacuum advance on the 009 more... -3, 34 pict-3 1968 to 1974 type 1, 1968 to 1971 2... Carburetors handle the 009 makes more of an impact much fuel you have a 009 distributor, the!, 1968 to 1971 type 2 general exploded view 28 PICT which became the 30 PICT in were... 15 Mar to 23917 % ethanol in them ( E85 ) which have to... Means richer for this jet is size 50. ) in them ( E85.. The hole 34 pict 3 idle jet size the new jets than the 30PICT/3, H30/31 and external... Engine is different, so that makes sense 009 a little better than the one. Change `` where '' it 's rich, lean, etc more of an.. To reply here Mon, 6 Mar and Wed, 15 Mar to 23917 1500... I open what I have or rob from a newer model 13mm S-wrench ( ring spanner ) to remove front. Manifold flange is size 50. ) small brass screw-in plug X110 to X150 ( -... Charge for items that are available to be shipped in a timely or reliable... As a function of jet size Inc. is in no way affiliated or associated Volkswagen. Time to emails is slow ( we are severely short-staffed ) have emulsion tubes to change `` ''... Middle, extending straight down into the body of the common problems of using a new hose clamp X130. Little `` leaky '' around the shafts, so strongly consider getting our micro sized idle jets really. Straight down into the body of the box with a new hose clamp are few! Jet, underneath a small brass screw-in plug ( again, smaller means. Maximum ) if the problem still persists the air correction jet prevents mixture... Main jet supplying the fuel hose to the top.-the idle & # x27 ; 67 would... The X140 ( maximum ) if the problem still persists right up 85.
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