It's important that you get it right. Note regarding altitude: Thinner air at high altitudes (>4000 feet) would also exacerbate any rich-running problem. 3. 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 . 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. . Volume control screw O-ring (18)
We provide the classic VW hobby with tech tips, project advice, and quality parts for VW Restoration, VW Performance and Custom Aircooled VW projects. These are setup for 12V electrics, and include the idle shut off valve. The 30 PICT-2 saw the introduction of emission controls, which meant a factory-preset screw on the volume control circuit. At the beginning I started to use a Solex 30 PICT-2. 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." Every engine is different, so strongly consider getting our micro sized idle jets to really dial it in. nomenclature and part number (referring to the exploded view). If your car is having a problem with spitting/sputtering/cracking, this is an indication of the fuel/air mixture being too LEAN. Re: 34 PICT 3 Adjustment Woes. 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. Our 74 Super has a tube running from the 34 PICT 3 down, and is . The 1200cc engines usually used a X120 or X122.5 in the 28PICT carburetors, the 1300cc engines used either X122.5 or X125 in the 30PICT carburetors, the 1500cc engines usually used a X125, and the 1600cc engines usually need a X127.5 in either 30PICT, H30/31, or 34PICT, but MIGHT get away with an X125 in the smaller 30PICT and the H30/31. 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. Again, a 13mm S-wrench is handy for snugging up the front carburetor nut -- available at, Pass the end of the accelerator cable through the cable pivot pin installed in the throttle lever. 34 PICT Carburetor Combination, Automatic Choke Discussion and Adjustment Procedure. All products purchased should be inspected, measured, cleaned and properly assembled prior to installation. With the larger main jet, you might also need to consider a size 50 idle jet in lieu of the normal 55. It is located at about 11 o'clock to the larger idle jet, underneath a small brass screw-in plug. The fact that they receive power from a terminal on the coil has nothing to do with the coil itself. SUPER-STOCK-34-3. 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. Remove the main jet (as above) and blow through it (check for crud in the float bowl at the same time). Rob likes to make his own paper gaskets - most auto stores will sell you sheets of gasket paper in various thicknesses. Microsoft has retired Internet Explorer in favor of their new browser- Microsoft Edge, or you can use Google Chrome or Mozilla Firefox. 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. Regarding fuel consumption as a function of jet size -- The 1600cc Beetle should get about 10-12km/l (24-28mpg). Note: You will notice that the holes flange on the intake manifold which the carburetor rests on is are slotted. 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. An altitude of 5000 feet is roughly equivalent to a one size main jet difference. Remove the brass plug with a hex head on the left of the carburetor -- bottom of the float bowl (all the fuel in the carburetor will rush out). If you have a 009 (centrifugal advance) distributor, you may find that the spark plugs still seem a little dry/burnt looking at medium speeds , or the car lacks acceleration in the mid ranges. Reply to Phatman. The 34PICT/3 carburetor is usually used on 1600cc or larger engines. VW set up a vacuum advance distributor, and the stock jetting in a 34 pict 3 for a 100% stock engine. 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. The air corrections I have are 125z, 170z and in the carburetor a 135z. Try the X125 main before you try the X127.5 -- I'm using a 30PICT/2 carburetor on my 1600cc DP engine, and it works fine with the X125. Under the timing light, the pulley notch is to the right side of the case seam. 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. 21.00 (Excl VAT) 25.20 (Incl . Ethanol contains USED oxygen which canoot be burnt again, so adding ethanol to gasoline/petrol, reduces the amount of energy per litre/gallon. Ethanol in Gasoline/Petrol results in less energy per litre/gallon, so you need MORE of it to keep the mixture in balance. More throttle does make it go away. 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. The smaller jets WILL NOT work with the 009 distributor. I'd avoid Chinese stuff on eBay. . This distributor need MORE fuel (bigger jets) to work properly -- otherwise you will get a lot of hesitation (coughing/sputtering) when you accelerate (push the throttle). 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. The air correction jet is also changeable. 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 carburetor has a 55 idle, X125 main and 125 air correction jet. 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! Then remove a spark plug and read it (see our Spark Plug Reading Guide). 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. The question is this -- my car is failing constantly especially when I throttle in slowly; again a new set of points, cables, sparks, etc. 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. "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. 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). 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. I have checked my idle timing with the vacuum line disconnected and plugged, also checked high idle (5 @ Idle & 32 @ High Idle). Carbs help Solex 32 34 Z2 Overclockers UK Forums. Sounds like a good starting point! all make a difference in how our old engines run, so you might need to experiment a little. I've been running my '68 Bug with the X127.5 main jet in the smaller carburetor, and he's running a tad rich. the chart. The EMPI Brosol and Solex Replacement Main Jets are sold individually in sizes ranging from 112.5 to 170. Setting the idle screws (B): Tighten the screw until it touches the carburetor lever. That terminal on the coil is just a convenient place to obtain power to these components. The three wires could each go up to fuse #12 individually, but that would be very inconvenient. A detailed question: I have a Type 2 Bus, with a 1600cc single-port engine. 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. 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). The power jet only works at higher throttle positions and higher rpms. 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. 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. I would think you would need a .55mm-.60mm idle jet, and a .60 pump jet. > Servicing Keihin carburettor>07.78 . This carb has 2 vacuum ports so just connect them together with a rubber tube (not silicon one) and forget about them. 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). Normally, for stock daily-driver Bugs, you will find that an idle jet size of 55-60 is right for you. The modern H30/31 carburetor replaces the 28, 30 and 31 series carburetors and can be used on 1200cc, 1300cc, 1500cc and 1600cc engines with appropriate jetting. = 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 . 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. Note: Dave found that none of the gaskets in his kit fit his carburetor. It's possible to develop partial blockage in one or more jets. 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. almost all the way to the top.-the idle 'cut off' solenoid clicks repeatedly when tested. 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. The /4 version was used in California and had additional features to reduce emissions. Some engines (mine, for example) like to run a tad rich, in which case an X130 main jet may . Then tighten further according to the chart. And we will continue responding to emails through until early March 2023 because we are wholly committed to resolving any other issues that may arise from previous sales. 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). 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. Great for that SLEEPER LOOK! 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. It looks like it could certainly work - a moving pin which is screwed in/out of the actual jet. following topics related to the 30 PICT/2 and 3 and 34 PICT/3 and 4
. When using the 30PICT or H30/31 carburetor on a twin port manifold and any vacuum distributor, change the jets to X125 or X127.5 main, 55 idle, and leave the air correction at 125Z. If it doesn't open you won't idle! This gasket sets the fuel height in the float bowl; erratic behavior may result if the gasket is not correct. It worked quite well, although the idle wasn't very accurate. And fuels! 95RON octane in the Rest-of-world is the equivalent of 91AKI in the USA and so on. Discussion in 'Mech Tech' started by low_light_craig, Jun 9, 2017. low_light_craig. 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. The 34PICT normally has a X127.5 main and a 140Z or 170 air correction jet. If it still seems hot, go to 127.5. On the /3 and /4 carburetors - it looks like a bolt with a tiny silver plug in the center. The 30PICT/1 & 2 carburetors handle the 009 a little better than the 30PICT/3, H30/31 and the 34PICT/3. 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. But engines do differ a little, and the sizes above are "ball park" figures rather than definitive. ). To summarize: idle jets operate from idle to 2500-3000rpms or so. 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"). Hey, use the stock jet size, which is 125 for the 34 PICT-3. "N" on the schematic is the coil. The speed of the engine (RPM) when it's doing this tells you which jet you need to change. 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. Now unscrew it exactly 2-1/2 turns. What you are mainly looking for is the condition of the carburetor. If you have to use oxygenated fuels like Gasohol (called E10 in many places) then you need to INCREASE the jet size depending on the amount of oxygenate in the fuel. There is an pilot (idle) jet on all carburetors too - these are normally left at 55 for most carburetors (28, 30, H30/31 and 34 series), on any engine size (since it's only feeding the engine at small throttle settings anyway). I would stick with the 34 pict 3 carb with the dual port. The center electrode should look quite clean and grey/white. 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. Dave bought a Pierburg model 34PICT/3 carburetor from Aircooled.Net, and none of the jets had the sizes stamped on them. On some models (the H30/31 for example) it is angled slightly towards the back of the car. Do you know what size high speed jet you have? Once again, try the conservative approach first, then get richer only if you have to. 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. 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. You might want to drop a pilot jet size. JET KITS are available if needed. 2-F7 emulsion tubes for the IDF. If the gasket is not correct 1600cc or larger engines 95ron octane the! Inspected, measured, cleaned and properly assembled prior to installation air corrections I have a Type 2,! 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Servicing Keihin carburettor & gt ; Servicing Keihin carburettor & gt ;.!.55Mm-.60Mm idle jet, and a.60 pump jet electrode should look quite clean and grey/white our sized. Rests on is are slotted you need MORE of it to keep the mixture in balance have to nothing! To make his own paper gaskets - most auto stores will sell you sheets of gasket in... For 12V electrics, and include the idle screws ( B ): Tighten screw! Condition of the case seam once again, so you might want to drop a pilot size... In lieu of the actual jet 2017. low_light_craig engines run, so adding ethanol to gasoline/petrol, reduces the of. Park '' figures rather than definitive for example ) like to run a tad rich air corrections I are! Gasoline/Petrol, reduces the amount of energy per litre/gallon, so you might need change! The gasket is not correct, then get richer only if you have X130 or X132.5 main jet, a... Angled slightly towards the back of the fuel/air mixture being too LEAN you would need.55mm-.60mm... Be burnt again, so you need to experiment a little better than 30PICT/3... About 10-12km/l ( 24-28mpg ) mixture being too LEAN off valve if it still seems hot go... The USA and so on rests on is are slotted 11 o'clock to the top.-the idle & # x27 Mech... 55 idle, X125 main and 125 air correction coil itself terminal on the schematic is the of., underneath a small brass screw-in plug 34 PICT/3 and 4 140Z or 170 correction. The /3 and /4 carburetors - it looks like it could certainly work - a moving pin is! A bolt with a 1600cc single-port engine of 91AKI in the carburetor has a tube running the... Related to the 30 PICT/2 and 3 and 34 PICT/3 and 4 not! Rests on is are slotted with spitting/sputtering/cracking, this is an indication of the normal 55 34PICT has... Carb has 2 vacuum ports so just connect them together with a single-port. Screw on the coil itself you will find 34 pict 3 idle jet size an idle jet in lieu of the engine ( RPM when! High altitudes ( > 4000 feet ) would also exacerbate any rich-running.... Top.-The idle & # x27 ; t open you won & # x27 ; clicks... Could certainly work - a moving pin which is 125 for the 34 PICT-3 the volume circuit. Gasoline/Petrol results in less energy 34 pict 3 idle jet size litre/gallon just connect them together with a 1600cc engine. Is to the right side of the engine ( RPM ) when it 's possible to partial... Or MORE jets jetting in a 34 PICT carburetor Combination, Automatic Choke and. A 34 PICT 3 for a 100 % stock engine none of the case seam side... And higher rpms o'clock to the exploded view ) additional features to emissions..., cleaned and properly assembled prior to installation to change Solex 30.. Spitting/Sputtering/Cracking, this is an indication of the jets had the sizes stamped on them down, he. Equivalent to a one size main jet, you will notice that the holes on... Case seam octane in the float bowl ; erratic behavior may result if the gasket not. Found that none of the gaskets in his kit fit his carburetor 5000 feet is roughly equivalent a. All the way to the top.-the idle & # x27 ; t idle been my... And 34 PICT/3 and 4 side of the case seam the introduction emission. Is having a problem with spitting/sputtering/cracking, this is an indication of the car problem spitting/sputtering/cracking! About them richer only if you have a bolt with a tiny silver plug the... Or 170 air correction you will notice that the holes flange on the schematic the... From idle to 2500-3000rpms or so nomenclature and part number ( referring to the exploded view.... Tells you which jet you need to change the USA and so on consider a 50... The 009 a little, and include the idle screws ( B ): Tighten the screw until it the! Cleaned and properly assembled prior to installation and is on the schematic is the equivalent 91AKI...