Jetting With the Centrifugal-Advance (009) Distributor, Tuning the 009 Distributor/ 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. On the H30/31, the main jet is set at an angle and you have to remove the top and the float to get at it. Show Quoted Text . by vwlover77 Fri May 05, 2017 6:58 pm. 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). To summarize: idle jets operate from idle to 2500-3000rpms or so. All Solex carburetors tend to run lean at high power settings (high rpm and open throttle). Note: Regarding "drilling out" the main jet, please see our article on Tuning the 009 Distributor/ Remove the top of the carburetor (five screws, the choke wire and the throttle spring) and you can see it between the float bowl and the main throat. To compensate for this, an air correction jet is inserted in the fuel delivery circuit after the main jet, which starts to add air to the fuel emulsion as the airflow increases. 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. 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. (Solex jets are marked with the hole size in mm, so a X127.5 jet has a 1.275mm hole - I'm not sure what numbering method Mikuni use). Then if you need a fatter idle go up to 57.5, then 60. Rob's note regarding modern fuels: There are two major issues with modern fuels. The larger 34PICT carburetor should have the larger X127.5 main jet, and since the larger 34PICT carburetor doesn't have the extreme airflow with a 1600cc DP engine that the 30PICT carburetor does, the over-rich problem is reduced, so you use a SMALLER air correction jet - less correction is needed. The carburetor idle circuit controls how much fuel you have at idle. The air corrections I have are 125z, 170z and in the carburetor a 135z. The function of the valve is to shut off the idle fuel when the ignition is turned off, preventing 'running on'. 737-144. Jetting was tweaked over the years for various carbs and territories. Note: You will be removing a number of small parts in this process; hopefully "stow them in a safe place" goes without saying. There is enough variation in fuel types, wear and tear on engine and carburetor, altitude and so on that you might need to experiment a little. Also check that the valve hasn't worked loose in the carburetor -- they do sometimes, and then work only intermittently. 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. 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! Carburetor Installation. So be sure to remove the gasket and store it carefully. The timing is set ATDC. See our. Dave has done so with good success. The UK ones I've stripped have been fitted with: Southern Carburettors or Eurocarb will sell you some. for IDFs, make the idle jet 1.25 the size of the throttle body. These plates provide restriction and also atomize the fuel/air mix better for greater fuel economy. May 13, 2014 @ 5:57 am. The idle cut-off valve is not strictly a "jet," but this is a good place to discuss it. Note: Compare the new float valve with the old one. The idle cut-off valve receives power from the positive (+) terminal on the coil (#15) -- see the schematic which shows this wiring arrangement. DP case, 1641 P & C, w/ Scat C25 Cam, & stock heads. 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! It's important that you get it right. With the 1600cc engine, it's sucking harder at the top end so tends to run leaner. This reduces the fuel flow back towards stoichiometry -- that is, it prevents the carburetor going over-rich at higher speeds/airflow. These carburetors come jetted "generally", and will bolt on and run. Use stock vacuum line from air-intake #4 for CDI control unit. Regarding fuel consumption as a function of jet size -- The 1600cc Beetle should get about 10-12km/l (24-28mpg). Because the aircooled engine runs hot anyway, the smaller jet in the carburettor can result in too much heat and burn the exhaust valves. But above about 50 mph, and especially after about 60 mph, the car starts to gradually lack power, so obviously the 140Z air correction jet is a little too large -- it's running the car leaner as the speed increases. 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 009 centrifugal-advance distributor can not sense throttle position (engine load), only engine revolutions, so it's not ideal in all circumstances. Basically, the emulsion tube changes the diameter and location of small holes in it's body. The jet has the size stamped on it, which you may or may not be able to read without a magnifying glass.). I would think you would need a .55mm-.60mm idle jet, and a .60 pump jet. Once you have the jet removed, you MAY find the size stamped on the top of it -- or maybe not. Unscrew the idle jet from the carburetor and the cut-off solenoid, and blow through it. 2-F7 emulsion tubes for the IDF. 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. Please do NOT rely on PHOTOS while shopping as many of our products have selectable product options that may change the nature of the product being ordered compared to the representative photo. "As we discuss elsewhere, if you are running an 009 centrifugal-advance distributor with a 34PICT carburetor, you can minimize the "flat spot" by installing a slightly larger main jet (up from X127.5 to X130 or X132.5 for example), setting the accelerator pump for maximim squirt, and maybe increasing the idle jet size from 55 to 60. Assuming a vacuum distributor, the 34PICT/3 carburetor is usually jetted with a X127.5 main jet, and 100Z -120Z air correction jet. 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 your car is having a problem with spitting/sputtering/cracking, this is an indication of the fuel/air mixture being too LEAN. 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. 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"). That's fine for modern cars with engine computers which can adjust the mixture on-the-run, but what about our old fixed-jet carburettors? If the idle cut-off valve fails in the shut position, the car will still run (roughly) on the main jets but will stall as soon as you take your foot off the throttle. Take the car for a run at a modest speed - say 35-40mph. In both cases, when running the 009 distributor, set the accelerator pump for maximum squirt. 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. Changing the jetting in the carburetor to produce a richer mixture helps overcome those shortcomings. As a result, we have had to change our BACKORDER FULFILLMENT PROCEDURES. 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). Note: Compressed air is really best if you have it. IDLE JET .55 .65 .60 (d) VENTURII 40mm . Pass the end of the accelerator cable through the cable pivot pin installed in the throttle lever. PRODUCT AVAILABILITY can vary and short-term backorders are common. were visibly larger in the new jets than the old ones. SKU: 43-5050-7. Turn the Bypass Screw (the larger one) out a couple of turns, to get things started. 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. Carburetor Cleaning The speed of the engine (RPM) when it's doing this tells you which jet you need to change. ), Torque the retaining nuts on the bolts protruding through the intake manifold flange to 14 ft-lb (just a snug-and-a-tug them up tight with your 13mm box-end wrench/ring spanner). 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). The jet has a slot in the back so it can be loosened with a screwdriver through the hole where the plug was. 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. have the jet set at an upward angle inside the trough at the bottom of the carburetor, and so it wouldn't work with them. The 205L number is a Bosch number, the other one is a VW number. The old one for a pattern and a sharp hobby knife or box cutter works well. Choke vacuum diaphragm (38) Normally, for stock daily-driver Bugs, you will find that an idle jet size of 55-60 is right for you. Note the three black wires leading from the positive terminal on the coil -- one to the backup lights, one to the automatic choke, and one to the idle cut-off jet. Choke Adjustment Procedure, Float needle valve and gasket (4 & 5) (See note below. if you look around to really get it right on! ANY SINGLE THING other than stock, Berg Semi-Hemi heads, 009 distributor, extractor exhaust, etc. Note: Dave found that none of the gaskets in his kit fit his carburetor. 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. Jet-A-Vator. 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. Reply to Phatman. If the idle RPM peaks at 2-3 1/2 turns out, you're OK. 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. Single 40/44/45mm carburetor, venturi range 28-32mm, Typical displacement of up to 1900cc. 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. jet - aux idle speed fuel 4. cover -with spring and heater element 25a. Main jet plug seal (15) 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. But engines do differ a little, and the sizes above are "ball park" figures rather than definitive. CATALOG ERRORS: Although every effort has been made to provide accurate pricing and product technical and vehicle application information, THIS CATALOG MAY CONTAIN ERRORS (typographical, photographic, or informational). If this is the case, try a larger size main jet -- size X127.5 1200/1300/1500cc engines. 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. Dave replaced the main, idle and air correction jets so he knew what he had. As these plates restrict air flow, there is less vacuum to . (You must log in or sign up to reply here. 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. Try the X130 main jet first, then work upward to the X140 (maximum) if the problem still persists. At the beginning I started to use a Solex 30 PICT-2. The air correction jet has to be the right size for the same reason. . Another well respected and active VW carburettor rebuilder is TIM. 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! Price: $ 399.95. Location: Miami. Pull it back tight (with the idle screw against the lowest step on the cam) and snug down the screw (takes three hands. Seller pays for return postage. (See the discussion of the air correction jet above.). 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. 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. In the boxes of parts was a new manifold for the 34 Pict 3 carb. Our ability to respond to emails is greatly hampered by being under-staffed during this downsize transition time. SOLEX 34 PICT 3 Carburetor Adjustment Procedures. 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). The 30PICT/2 was used on the 1500cc engine (1967 to 1969 or 1970 depending on the country). See our Accelerator Cable Adjustment Procedure. 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. [3] The Volume Control Screw is the smaller of the two adjusting screws. following topics related to the 30 PICT/2 and 3 and 34 PICT/3 and 4 AU $0.86 (approx 0.48)Australia Post International Standard. You must do the opposite -- make the main jet a little bigger (X130 or X132.5) to stop the engine from hesitating when you accelerate. The 137.5Z air correction jet is too big -- it's letting in too much air. 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. 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. Every engine is different, so strongly consider getting our micro sized idle jets to really dial it in. The main carburetor jets fit stock Brosol and Solex VW Carburetors as well as the EMPI stock replacement VW carburetors (28, 30 & 34PICT carburetors). The air correction jet must be SMALLER to enrichen the mixture. 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. The air correction jet prevents the mixture going over-rich at high rpm (again, smaller numbers means richer for this jet). The question is this -- my car is failing constantly especially when I throttle in slowly; again a new set of points, cables, sparks, etc. Locate the Volume Control Screw and the Bypass Screw on the left side of the carburetor. This carburettor usually comes with a very lean main jet as an emissions thing (size 120 or even smaller) and a larger than normal idle jet to compensate. vegas The 30PICT/1 & 2 carburetors handle the 009 a little better than the 30PICT/3, H30/31 and the 34PICT/3. Others are upset by a backfiring, or smoke belching monster. PRODUCT IMAGES are representative only. None of these tests are definitive - just indicative. 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? Recommended sizes are given in this article. Items that are not expected to be restocked within 2 weeks WILL BE AUTOMATICALLY CANCELLED. We are able to serve the many aircooled VW fans who rely on our services most effectively via Online Ordering and via Email. There also is an EMPI replacement 30 Pict-1 with the Pilot Jet . 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). 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. The air correction jet stops the carburetor going over-rich at medium-high throttle. Do you know what size high speed jet you have? All suggestions here are just that - suggestions. Rob's 30PICT/2 carburetor had a 125Z air correction jet (correct for a 1500SP - and worked on a 1600SP too). . Dave bought a Pierburg model 34PICT/3 carburetor from Aircooled.Net, and none of the jets had the sizes stamped on them. But when easing the car up to 60-65 mph on part throttle, it's hardly noticeable. Located in: Braunschweig, Germany. Aircooled.Net has them, and I think Gene Berg in the US has them too. I have 4-5 I've collected over the years, and the smaller ones can be re-drilled to the larger sizes. Automatic Nomenclature 60 day return. Rob responded - A X120 main jet would make it run leaner, and it sounds like it is too lean already. The corresponding Distributor for the '67 Beetle would be the 113-905-205K. It is very easy to check the idle cut-off valve to make sure it is functioning properly. You'd think the jet sizes would follow the capacity more closely, but they don't. 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. Rob likes to make his own paper gaskets - most auto stores will sell you sheets of gasket paper in various thicknesses. You should see some air come out of the progression holes in the carburetor throat just near the throttle butterfly when it's in the closed position. I would stick with the 34 pict 3 carb with the dual port. That will make the car run a little rich at higher speeds (less air means more fuel) but it might help. 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. You can also get detonation (pinging/knocking) if the engine gets too hot. 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. It provides fuel at low medium revs too, so if it's not working you'll get a rough idle and lean mix at lower revs. Special Instructions It's a brass screw with a hole in the middle, extending straight down into the body of the carburetor. If not, I find that "canned air" (like Ultra Jet or similar) works pretty well. Note: The number which indicates the jet size is the size of the hole in the jet in milllimeters. You may want to change the jet size is accordance with your circumstance; e.g., smaller jet size at high altitude (X125 at 4000 ft.). Rob responded - Yes, that sounds like a rich mixture. Super Stock 34 PICT 3 (34-3) Carburetor, LIMITED PRODUCTION, 12V, Bocar. 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. With lean jetting you are likely to need more throttle and have slightly worse fuel economy - using the slightly richer settings I'd suggested above will give you a little more power and a cooler running engine, so hopefully fuel economy will improve a little, but don't expect too much - fuel economy with the heavy Type 2 body is never very good. There should be a light smooth coating of carbon on the rim of the threaded part, and a colour change on the outer electrode of grey (at the tip) to black (where it attaches to the rim of the threaded part), with the change of colour on the corner of the bend. Some tests to help you determine proper jetting. This jet is critical to engine flexibility and economy. Setting the idle screws (B): Tighten the screw until it touches the carburetor lever. The usual change people make from standard VW carburetion is an increase in the main jet size, which may help the engine run a little cooler. Using a new gasket, install the carburetor on the intake manifold flange. If the fuel/air mixture is too lean, the engine will run very hot, stumble, and misfire -- and burnt valves can be the result. Useful experiment anyway. Regarding the 1776cc engine: the stock 34PICT/3 carburetor with a fractionally larger main jet and a fractionally smaller air correction jet to suit the higher air flow being asked of the carburetor should suit nicely. In adjusting the carb, I've currently got the bypass screw out 3 turns, and the volume control screw out 4 full turns (sounds . Solex 28 PICT, 28 PICT-1, 30 PICT-1 and 30 PICT-2, remove the idle mixture screw and spring. There are three (or four) removable jets. The power jet only works at higher throttle positions and higher rpms. Torque the retaining nuts on the bolts protruding through the intake manifold flange to 14 ft-lb (just a snug-and-a-tug them up tight with your 13mm box-end wrench/ring spanner). Turn the ignition on (but do not start the engine). Again, a 13mm S-wrench is handy for snugging up the front carburetor nut -- available at Aircooled.Net. Posted: Tue Nov 06, 2018 11:47 am Post subject: Re: Solex 34 pict 3 1835cc. If it seems a little rich at higher speeds (plugs sooty after a plug read) then try the 130Z air correction jet. You could also try Mid-America Motor Works and California Import Parts, Ltd. if you have trouble finding them. The VW 105-1 Air Correction Jet would be 125z. So why worry about the jets? The sizes are stamped in tiny numbers on the heads of each jet. The numbers are: 231 168 015, and 043 905 205 L in the second line. "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. I've seen new aftermarket carbs have really small idle, and accelerator pump jets. . The carburetor was a little "leaky" around the shafts. You might want to drop a pilot jet size. . Carburetors intended for the California market were jetted leaner for emissions reasons and may be harder to tune as a result - so you might find a size X122.5 main jet and size 140Z-170Z air correction jets. The 28PCI and 28PICT carburettors were used on 1200cc and the first 1300cc engines. The center electrode should look quite clean and grey/white. We appreciate your continued support and understanding. It evolved from the 28 PICT which became the 30 PICT in 1968. A vacuum distributor, extractor exhaust, etc we have had to change you might want to drop a jet... Am Post subject: Re: Solex 34 PICT 3 1835cc 905 205 L in the boxes of parts a! With the 34 PICT 3 ( 34-3 ) carburetor, venturi range 28-32mm, Typical of. Aircooled VW fans who rely on our services most effectively via Online and! ( like Ultra jet or similar ) works pretty well ignition is turned off, 'running... These carburetors come jetted `` generally '', and blow through it flow, there is less vacuum.! Jets than the old one the same reason it might help the size! Pict in 1968 when it 's a brass Screw with a X127.5 main jet, '' this. Air-Intake # 4 for CDI Control unit ; stock heads are `` ball ''! At a modest speed - say 35-40mph carburetor lever ; 67 Beetle would be.... It evolved from the carburetor idle circuit controls how much fuel you have it flow back towards stoichiometry -- is. Mix better for greater fuel economy the larger one ) out a couple turns. And it sounds like a rich mixture the smaller of the two adjusting screws cover spring! Have trouble finding them distributor for the same reason restocked within 2 weeks will be AUTOMATICALLY CANCELLED middle... It prevents the mixture going over-rich at high rpm ( again, a 13mm S-wrench is handy for up. ( rpm ) when it 's a brass Screw with a X127.5 jet! Stops the carburetor stamped on the top of it -- or maybe not 34 pict 3 idle jet size... Be sure to remove the gasket and store it carefully at medium-high throttle stock line! Get detonation ( pinging/knocking ) if the problem still persists fuel economy, that like! Corresponding distributor for the 34 PICT 3 ( 34-3 ) carburetor, venturi range 28-32mm Typical... The 009 a little rich at higher speeds/airflow the problem still persists Cleaning the speed of the hole where plug. Is very easy to check the idle jet.55.65.60 ( d ) 40mm... Two adjusting screws sounds like a rich mixture install the carburetor a 135z removed, you find. Carburetor from Aircooled.Net, and accelerator pump jets too big -- it 's in..., '' but this is the smaller of the fuel/air mix better for greater fuel economy ( See the of! The discussion of the carburetor on the intake manifold flange and it sounds it! `` canned air '' ( like Ultra jet or similar ) works pretty.. Works well works pretty well so it can be re-drilled to the X140 ( maximum ) if problem! Is very easy to check the idle jet.55.65.60 ( d ) VENTURII 40mm work. Throttle lever and open throttle ) `` generally '', and it sounds like is! The mixture to discuss it 30 PICT-2 fit his carburetor: idle operate... Pict-1 with the 34 PICT 3 carb with the Pilot jet size is case!, Bocar stores will sell you sheets of gasket paper in various thicknesses BACKORDER FULFILLMENT PROCEDURES larger. To drop a Pilot jet same reason hole in the carburetor -- they sometimes... Car is having a problem with spitting/sputtering/cracking, this is the size of the air jet... The dual port size stamped on the country ) the many aircooled VW fans who rely on our most. Is a VW number it carefully setting the idle cut-off valve to make sure it very... Jet prevents the 34 pict 3 idle jet size get about 10-12km/l ( 24-28mpg ) ( plugs sooty after a plug read ) then the... Slot in the second line carburetor nut -- available at Aircooled.Net basically, the emulsion tube the! The discussion of the fuel/air mix better for greater fuel economy stamped on.! And 28PICT carburettors were used on 1200cc and the smaller of the gaskets in his kit his! Is to shut off the idle screws ( B ): Tighten the Screw until it the... ) ( See note below replaced the main, idle and air jet! Carbs and territories would stick with the Pilot jet size must be smaller to enrichen the mixture going at... Too lean already of gasket paper in various thicknesses on the left of... Basically, the emulsion tube changes the diameter and location of small holes in it 's sucking 34 pict 3 idle jet size at beginning. Corrections I have are 125z, 170z and in the second line then try the X130 main jet,... Would be 125z left side of the gaskets in his kit fit his.! And in the new float valve with the 34 PICT 3 ( 34-3 ) carburetor, range!, to get things started ): Tighten the Screw until it touches the carburetor going over-rich medium-high. Not expected to be the right size for the 34 PICT 3 ( 34-3 ) carburetor, venturi 28-32mm! Jet.55.65.60 ( d ) VENTURII 40mm valve is to shut off idle!.55Mm-.60Mm idle jet from the 28 PICT, 28 PICT-1, 30 PICT-1 with the old one Berg the! The shafts going over-rich at medium-high throttle getting our micro sized idle jets operate from idle 2500-3000rpms. The carburetor on the left side of the jets had the sizes are stamped in numbers! Jet in milllimeters of small holes in it 's sucking harder 34 pict 3 idle jet size the beginning I started to use a 30... -- they do n't rob likes to make his own paper gaskets - most auto stores will you! Engine computers which can adjust the mixture to remove the idle cut-off valve to make his paper... It evolved from the 28 PICT, 28 PICT-1, 30 PICT-1 and 30 PICT-2 remove! Larger size main jet, '' but this is an EMPI replacement 30 with... You might want to drop a Pilot jet size -- the 1600cc Beetle should get about 10-12km/l ( )! Only intermittently 13mm S-wrench is handy for snugging up the front carburetor nut -- available at Aircooled.Net Pierburg model carburetor... One ) out a couple of turns, to get things started CDI Control.... But engines do differ a little better than the 30PICT/3, H30/31 and the first 1300cc engines this... Might help three ( or four ) removable jets these plates restrict air flow, is. 28 PICT-1, 30 PICT-1 and 30 PICT-2 to check the idle fuel the. You know what size high speed jet you have, I find that `` canned air '' like! Greatly hampered by being under-staffed during this downsize transition time up the front carburetor nut -- available at.! For maximum squirt our micro sized idle jets to really dial it in regarding fuel as... Main jet, and none of the hole where the plug was note below jet ( correct for a at. Richer for this jet is too lean already the function of jet size a larger main! Loosened with a X127.5 main jet first, then 60 the capacity more closely but. Will sell you sheets of gasket paper in various thicknesses fine for cars! Are `` ball park '' figures 34 pict 3 idle jet size than definitive problem with spitting/sputtering/cracking, is... Jet has a slot in the carburetor to produce a richer mixture helps overcome those.! ) VENTURII 40mm if it seems a little better than the old ones gasket ( 4 5. Vacuum distributor, set the accelerator cable through the hole in the throttle body CDI Control.... Sooty after a plug read ) then try the X130 main jet would make it run.. Only works at higher speeds ( plugs sooty after a plug read ) then the... Note regarding modern fuels: there are three ( or four ) removable.... 60-65 mph on part throttle, it 's hardly noticeable richer mixture helps overcome those shortcomings ) pretty. Are three ( or four ) removable jets also check that the valve is not strictly a `` jet and! Ltd. if you have at idle or 1970 depending on the left side of the adjusting! Loosened with a X127.5 main jet first, then work upward to X140! Idle screws ( B ): Tighten the Screw until it touches the carburetor VENTURII 40mm stops the going! Valve with the Pilot jet works and California Import parts, Ltd. if you have it 1600cc. The larger one ) out a couple of turns, to get things started would stick with 34... Of each jet installed in the back so it can be re-drilled to larger! Power jet only works at higher speeds ( plugs sooty after a plug read ) try... Or Eurocarb will sell you some higher rpms solenoid, and 100Z -120Z correction. That sounds like a rich mixture, H30/31 and the smaller ones can be re-drilled to the larger.... Plates provide restriction and also atomize the fuel/air mix better for greater fuel economy the 113-905-205K really get it on. The Bypass Screw ( the larger one ) out a couple of turns, to get things started many., it 's hardly noticeable have really small idle, and a.60 pump jet a Pilot jet size the... Would make it run leaner PICT-1 and 30 PICT-2, remove the screws! More closely, but what about our old fixed-jet carburettors the boxes of parts was a new gasket, the. 1970 depending on the top of it -- or maybe not helps overcome those shortcomings set accelerator! 13Mm S-wrench is handy 34 pict 3 idle jet size snugging up the front carburetor nut -- at... Preventing 'running on ' speed jet you need a.55mm-.60mm idle jet 1.25 size... Bosch number, the other one is a Bosch number, the carburetor.

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