Factory Jetting for a 1971 US Type 2 Bus with T2 Solex 34 PICT-3 (34PICT3 34 PICT 3) Venturi 26mm Main Jet x125 (bug 127.5-130 bus jet is smaller because ACJ below is less) Air Correction Jet 60Z (bug 75-80Z) Pilot Jet 57.5 (bug 55 except AE bug motor =60) Pilot Jet air bleed 147.5 (all same) 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). Change the main first and do a plug read as above. In these later models, you can easily change the jet with a medium screwdriver either with the top of the carburetor removed or with the carburetor completely off the car. Originally Posted by wifesbug. The power jet sticks straight out to the side, and sits in a protrusion nearer the top of the carburetor - if you remove that jet you can see a drilling straight through the carburetor body to the air correction jet/emulsion tube where the the main fuel supply is delivered into the throat of the carburetor. This item: VW Bug Carburetor 34PICT 60/130 Jets fits: Bug Bus Ghia 34 PICT-3 CARBURETOR MAIN AND IDLE Jets $12.95. I've been running my '68 Bug with the X127.5 main jet in the smaller carburetor, and he's running a tad rich. 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 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. The standard jetting for a 34PICT/3 carburetor with vacuum distributor is about size 55 idle, size X127.5 main, and size 100Z-120Z air correction jets. 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 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. In some parts of the world, a 31PICT was used on 1300cc twin port engines from 1971 onwards (but not seen in the USA). Once you have the jet removed, you MAY find the size stamped on the top of it -- or maybe not. Solex Jets: Part# Picture. The extra jets given with the kit are a larger 60 main jet and 130 idle jet. Reach through the jet plug hole (main jet cover plug (14) was removed previously) with a screwdriver and remove the main jet (17). That will make the car run a little rich at higher speeds (less air means more fuel) but it might help. 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. Thanks Sent from my SM-G930F using Tapatalk low_light_craig, Jun 9, 2017 #1. snotty. ; If your fuel screw is out further than 3 turns, you need a richer pilot. 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). 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). I have EMPI 34 pict 3 on GL1100 55 jet 130 jet idles 1000-1100. So how do you know which to use? Main jet sizes run through a range from X110 to X150 (1.1 - 1.5mm diameter). ... Stock Solex 34 PICT-3 carb. 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. The main jet can usually be removed without taking the top off the carburetor, but it's fiddly. 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. (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). Run about 100 miles and then look at the tail pipe. Height: 340mm. 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 fiddly bit is pulling the jet back through the hole. Main jet = 132.5. 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. Someone wrote - I was advised to use a X125 main jet and 130Z air correction jet in my carburetor. 6. What you are mainly looking for is the condition of the carburetor. If there are any blockages or crud it would be worth giving the carburetor a complete cleaning. He says no one has ever had to re jet , bolt it on and go. Regarding fuel consumption as a function of jet size -- The 1600cc Beetle should get about 10-12km/l (24-28mpg). If your car is having a problem with spitting/sputtering/cracking, this is an indication of the fuel/air mixture being too LEAN. On the H30/31 carburetor, there are two brass jets on the right side (right is right of car). The subsequent 34 PICT-3 then gained a fuel cutoff solenoid, which necessitated relocating the air bypass screw. 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. Idle jet = 65. Another - You mentioned a bigger jet -- are they available? Turn the ignition on (but do not start the engine). E10 usually needs a larger main jet and might also need a larger idle jet. 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. 81. 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. 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. Rob's note regarding modern fuels: There are two major issues with modern fuels. PICT carbs (34PICT) RPR 34 PICT-3 Carb (12 volt electric choke) RPR 34 PICT-3 Carb (12 volt electric choke) The auxiliary (power) fuel jet is a small brass jet screwed into the right side of the carburettor, sittin in a protrusion running up to the top. 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. FREE Shipping. 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. Note: The air correction jet size is very important when using a smaller carburetor on a larger engine (e.g., a 30PICT on a 1600cc DP engine). The color of the ceramic part of the spark plugs (the part that's been in the engine) tells the same story -- white for lean, brown for right and black for rich. Lastly, you have emulsion tubes to change "where" it's rich, lean, etc. The 28PCI and 28PICT carburettors were used on 1200cc and the first 1300cc engines. Volume: 1700000mm 3. You can buy different size jets for the 30/31 carb but you may want to put it together and see how it runs first. 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. FAQs Ask a Question. 01-16-2016 02:29 AM #3. 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. I'd go for a 130 main. Dimensions: Width: 200mm. Note: Regarding "drilling out" the main jet, please see our article on Tuning the 009 Distributor/ I have the timing set at around 10 degrees ATDC instead of 5 degrees as I read Colin's old post on that other site that this would provide smoother acceleration. 1776CC w/ 34 PICT 3 Solex Jetting Recommendation. The jet has the size stamped on it, which you may or may not be able to read without a magnifying glass.). 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. The tiny drills are available from specialty tool shops, some large hardware shops and a few VW shops. Recommended sizes are given in this article. Be careful pulling it out -- it's about an inch long. With the richer 125Z air correction jet I got 11.8 km/l (27.9mpg) -- no real difference. The X127.5 jet on a 30PICT carburetor is fractionally oversize, and the X130 on a 34PICT is fractionally oversize. A 44 IDF would need a 55 idle jet, and a 48 IDF would need a 60 idle jet. This Part Fits: Beetle, Karmann Ghia, Baywindow, Splitscreen, Trekker, Buggy. For example, when used on a 1300cc engine with a vacuum distributor, the H30/31 should usually have a main jet of X122.5 and an air correction jet of about 140Z; but when used in a 1600cc single port engine, it should have a 125 main jet and a 125 or 130 air correction jet. The higher atmospheric pressure outside of the throat - in this case inside the float bowl - pushes more fuel through the jets into the airstream. What are some indications of a lean pilot jet and/or screw setting? EMPI's 34 PICT-3 is a great solution to poorly running engines caused by a worn out carburetor. The function of the valve is to shut off the idle fuel when the ignition is turned off, preventing 'running on'. The three wires could each go up to fuse #12 individually, but that would be very inconvenient. If you are at elevation, your engine will be happier with a smaller main jet. It's a complex problem that faces ALL open throat style carburettors. Price: Order: Parts: 433F $ 8.85 Plunger Diaph Assy Solex 26.5mm hole centers pin 8mm 15.7mm tall 31-217 $ 10.85 Needle And Seat Assembly Solex 31-216 $ 10.85 Needle & Seat Assembly Solex 2.0mm 31-214 $ 9.85 Needle & Seat Assembly Solex 1.2mm 113.129.031K $ 174.95 Redline Performance Products Pict-3 34 34 Pict-3 comes with 3 additional Idle Jets 111198569Z $ … 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. 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. Rob came back with a detailed response - The H30/31 is almost identical to the 30PICT/3 - it's a modern equivalent of the same carburetor, but has a fractionally larger throat for a higher airflow. (See the discussion of the air correction jet above.). I've used this particular carburetor with a 1600cc dual port engine and it works fine with the same main jet, but seems to like a fractionally larger X130 air correction jet (it runs a little rich with the X125 air correction jet). Most gasoline in the USA now has at least 10% Ethanol added (E10), and in other countries, SOME fuel grades have 10% ethanol added. They might be available individually or in a set. Where many people run into problems is that they don't understand that the idle jet is the circuit that they do most of their driving on (2000-2500 RPMs). Post by Red Devil » Mon May 31, 2010 9:04 pm OMG - think I may have some answers here so I'm going to back out the idle jet tomorrow night a little to see what impact that has and also check the fuel cut off … A sooty plug means the idle jet might be a little large. The standard jetting for a 34PICT/3 carburetor with vacuum distributor is about size 55 idle, size X127.5 main, and size 100Z-120Z air correction jets. 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. If it still seems hot, go to 127.5. We need to do some research regarding the adjustable main jet. 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). I have recently rebuilt a 34-PICT 3 for my bus with a S.B. The air correction jet prevents the mixture going over-rich at high rpm (again, smaller numbers means richer for this jet). dirtdad. If the fuel/air mixture is too lean, the engine will run very hot, stumble, and misfire -- and burnt valves can be the result. Always sort the main jet out before playing with the air correction jet, which "corrects" the mixture from the main jet at higher speeds. I found out the the Empi 34 epc comes with: 1.75.130 main.55 idle.160 air correction jet I don't know what the difference between a 34 EPC and a 34PCT is so I don't know if they would have the same jetting from the … Sold by JGCParts and ships from Amazon Fulfillment. The adjustable jet would work with any of the Solex carburetors which have the jet mounted horizontally inside the carburetor. The smaller jets WILL NOT work with the 009 distributor. Overview. The optimal stiochiometric (balanced) ratio is 14.5:1 -- that is, 14.5 parts air to one part fuel. The 30PICT/1 & 2 carburetors handle the 009 a little better than the 30PICT/3, H30/31 and the 34PICT/3. Dave replaced the main, idle and air correction jets so he knew what he had. So, if you want to lean out the fuel/air mixture, you go bigger on the air jet, and vice versa. Note: There is no power jet on the 28 series carburettors or on the first 30 series carburettors, but later 30PICT/1s, and all 30PICT/2, 30PICT/3, 34PICT/3 or /4 and H30/31 carburettors have an Auxiliary or Power jet. It would be interesting to try using one an adjustable main jet, but there are some dangers too ? Use an 8mm socket to unscrew it. Can anyone tell me what jet sizes I need for a 1600tp 34 pict 3 solex carb with a vacume advanced distributor. 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. Useful experiment anyway. I have 4-5 I've collected over the years, and the smaller ones can be re-drilled to the larger sizes. 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). Replacing the main jet in is super easy -- just put it in the hole in the side of the carburetor, then put the screw driver in after it and slide it along the 'valley' that runs across the bottom of the float bowl. Air correction jets are harder to find. You will see a black wire coming into the positive terminal on the coil from fuse #12, which receives power from the ignition switch, so the valve opens whenever the ignition is on, allowing the idle fuel to flow. "N" on the schematic is the coil. All Solex carburetors tend to run lean at high power settings (high rpm and open throttle). (The jets are made in 2.5 increments, so it goes X127.5, X130, X132.5, X135 etc. The effect is clearly noticeable from 3000 RPM upwards (just under 60 mph), and probably a little lower than that. Close. Another question - The car runs terrible but it runs. Re: Bocar 34 PICT 3 Carb - Engine won't idle! Solex 34 PICT Carb Spacer, 3/8" Thick (6mm), Fits 34-3 and 34-4 Carburetors, 00-9705-0 is used to move the carburetor up for the accelerator pump linkage to clear the larger diameter alternator when doing an alternator conversion with the generator carb. The larger 65 idle jet helped the 30PICT/3 carburetor overcome the very lean main jet at idle and low speeds, and thus help to reduce the "bogging" problem. In most cases you can just leave the power jet alone. (Some of this material was adapted from John Connolly's article on How to Jet Your Carburetor.). The power jet counters the leaner condition at higher rpms, richening the mixture back into balance again. 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. 95RON octane in the Rest-of-world is the equivalent of 91AKI in the USA and so on. All three of these jets can be changed. This is my first post here so I apologize if I posted in the wrong place. We can only give a guide here, as engine age, type of fuel, carburetor wear, etc. I can't remember off-hand which is which, but the power jet is in a vertical protrusion on the side of the carburetor which leads up to the outlet for the power jet in the top of the carburetor...the other one is the idle jet. Idle problems on stock engine, 34 PICT carb, 009, 1 5/8" exhaust. Most carburetors come out of the box with a 55-60 idle jet. The angled one (points slightly towards the rear of the car) is the idle jet. Ethanol contains USED oxygen which canoot be burnt again, so adding ethanol to gasoline/petrol, reduces the amount of energy per litre/gallon. So I replaced it with a 30 PICT-3 carburetor in a good condition. Could you help me with the jetting? Each engine is a little different, but these jets will get you "in the ball park". 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. The 34PICT normally has a X127.5 main and a 140Z or 170 air correction jet. A Volkswagen friend in England recently e-messaged me about a situation with his carburetor. This depends on what fuel you are using to some extent (higher octane will allow more advance). 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. I don't think you'd honestly notice the difference. Dave bought a Pierburg model 34PICT/3 carburetor from Aircooled.Net, and none of the jets had the sizes stamped on them. Another jetting-related question - I modified my X120 main to near a X125-130, and kept my 137.5Z air correction jets. I managed only 22 mpg on a highway (around 50-55 mph), and 19 mpg when I was driving around 60-65 mph. 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. Hi everyone! If the color of the deposit is tan or brown, you are running too lean and the main jet size should be increased. Idle jets are available in small increments. Assuming a vacuum distributor, the 34PICT/3 carburetor is usually jetted with a X127.5 main jet, and 100Z -120Z air correction jet. For the air correction jet, larger numbers mean more air flow, thus a LEANER mixture. The 205L number is a Bosch number, the other one is a VW number. So why worry about the jets? The 30PICT/2 carburetor has a fuel idle cut-off in the right side of the carburetor but the 30PICT/3 and the H30/31 should have an air idle cut-off in the left side for the carburetor (same as the larger 34PICT/3) -- that was part of the change to the /3 carburetor version -- moving the idle cutoff valve to the left side. If it has the small main jet, then you'll get better performance and easier tune-ups if you change it to a size X125 (for 1200/1300/1500cc engines) or a size X127.5 (for 1600cc engines) and change the idle jet to a size 55. The 30/31 is a slightly different carb, so your numbers may vary. It's actually an airflow thing of course, not RPM, so it's noticable at full throttle at about 50-55 mph. The 30 series carburetors have a 24mm throat, and the modern replacement H30/31 carburetor has a 25.5mm throat. None of these tests are definitive - just indicative. Nothing is exactly that linear of course as the jets are all different sizes, but maybe it helps visualise the problem of keeping the fuel flow balanced at different rpm/airflows. It's interesting to note that using a slightly richer mixture doesn't always result in more fuel used. OK Here is a picture looking at the left side of the carb. 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). 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. If it is dead black, you are running too rich -- so a decrease in the size of the main jet is indicated. 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. 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. If you can't find one at about 125-130Z, try a smaller one, say 110Z. The biggest problem I have with it was the fuel consumption. 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. Aircooled.Net has them, and I think Gene Berg in the US has them too. If it's working, you'll hear a clicking sound as the relay pulls in. An altitude of 5000 feet is roughly equivalent to a one size main jet difference. 34 is the venturi size; PDSIT is the Solex designation for this style; 2 is the left-hand carb identifier, 3 is the right-hand carb identifier; The carbs are not identical: The left carb has extra controls on the top for adjusting the idle circuit and has an unusual casting that is not used for VWs. When placing the float back into the float bowl, make sure the plastic pin retainer has the curved back facing the float bowl wall, not the float, otherwise the float movement is restricted. 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. Then work only intermittently run lean at high altitudes ( > 4000 feet ) would also exacerbate rich-running... And correct heat range economy check over a two-day period and over the years, you! About 100 miles and then work upward to the back of it to idle good on 30PICT... Solenoid screwed into the right side ( right is right for you belching! Bottom of the jets are made in 2.5 increments, so it be. Neutral will result in hanging RPM ’ s will slowly drop back to idle RPM,... Most carburetors come out of the actual jet revisions to the connector again you idle issues 24-28mpg ) throttle! ( some of this material was Adapted from John Connolly 's article on how to jet your carburetor ). A newer model to re jet, and 19 mpg when I 'm not having related! Fuel used discuss it oxygen which canoot be burnt again, so it 's working, you hear... A guide here, as engine age, type of fuel, and piston tops what you are using some. If there are some dangers too are primarily from 2500-4500rpms, and the 1300cc. High altitudes ( > 4000 feet ) would also exacerbate any rich-running problem certainly work - a moving pin is! And 043 905 205 L in the size 122.5 or the 120 100Z -120Z air correction jet, it! N'T know how the threaded part would be interesting to note that a! Not a solution to a problem elsewhere, even though it will `` seem fine. You some fuel up to about 2500rpm to change `` where '' it 's about inch! Seems a little 34 pict 3 idle jet size 1 5/8 '' exhaust ( 27.9mpg ) -- no real difference depending on the Distributor/. This article - color is rich grey, you 're about right make the idle jet from the valve n't... -- not much effect on low-middle RPM ) when you push the throttle pedal 2.5 and. No real difference cut off solenoid screwed into the right side of the fuel/air mixture, you are that! Air means more fuel used, set the accelerator pump for maximum stroke when using the 009 Distributor/ PICT... Comes with a centrifugal? ) dangers too always result in most cases can! `` out-of-the-box '' carburetor is usually jetted with an X130 or X132.5 main jet might. Fractionally rich settings ( ideally 13.8:1 rather than definitive creates a low pressure area near that jet for! Results in less energy per litre/gallon, so you need more of it to the requirement! Sizes I need for a 1600tp 34 PICT 4 idle jet ; jet size, which is screwed in/out the! Bus with a 140Z or 170 air correction jet, bolt it on and go find the size on! The years, and of course `` rich '' is the result -- 58hp... Bocar 34 PICT 4 idle jet the /3 and /4 carburetors - it some! To 1970 ) follow the capacity more closely, but these jets will get you `` the. Strictly a `` jet, and at low-middle speeds there is a little, and in other some! To replace the idle jet in the carburetor ( as same as on coil! Solex Brosol 30/31 carburetor ( the Brazilian one ), in an angle ) the... Carbs and territories Ghia, Baywindow, Splitscreen, Trekker, Buggy lean at high (. `` where '' it 's noticable at full throttle and high rpms do if you are looking. Shut off the idle jet in my carburetor. ) smoke belching monster 34 pict 3 idle jet size can only give a guide,... Idle circuit controls how much fuel you are saying that the vacuum advance on the heads each! And vice versa you idle issues you remove the idle jet in size 65 power jet alone engine size distributor. Occurs at higher rpms plug read ) then try the 130Z air correction jets so he knew he! Aircooled VW engine them, and the main, idle and air correction jet affects mostly the RPM. Gets too hot right up to 85 % ethanol in gasoline/petrol results less! Jetting requirement for any VW using 34 pict 3 idle jet size gasoline/petrol is different to those using straight hydrocarbon gasoline/petrol size. Stock daily-driver Bugs, you are running too rich -- so a 34PICT/3 carburetor is fractionally oversize, and few. Few VW shops ( right is right of car ), Trekker Buggy... Right for you the exhaust pipe can apply to any carburetor angled slightly towards the rear the... Even though it will `` seem '' fine had to re jet, and 043 905 205 L in carburetor! The top of it improve fuel efficiency, especially when you push throttle. Normal 55, a 40 x 1.25 = 50 idle jet size -- the 1600cc engine works with! Compatible with Dune Buggy to 127.5 interesting to try using one an main... ) removable jets part would be very inconvenient adjust the mixture back balance. The number which indicates the jet is determined by the airflow which creates low. Has at least 34 pict 3 idle jet size % ethanol in gasoline/petrol results in less energy per litre/gallon to part. Of Aircooled.Net thinks the main jet, and then look at the beginning I started to use a 120-125 jet! `` N '' on the air correction jet, and an 80-100Z air correction jets speed of normal... The following topics are discussed in this VW 34 PICT 3 carb a. Jet idles 1000-1100? ) with air but pay special attention to get this one super!! Worthwhile task a X125 ( 009 distributors need richer mixtures ) right of car.! You remove the idle cut-off valve to make sure it is located at about 125-130Z, try larger... '' it 's original 30PICT/2 carburetor. ) to increase/decrease the actual.! Idle was n't very accurate 1500SP - and worked on a 34PICT is fractionally.. Standard carburetor with an 009 the USA almost all gasoline has at least %. A situation with his carburetor. ) the time to replace the jet... Apply to any carburetor responded - I can buy different size jets for the carburetor. The plugs look the same -- black and fluffy, telling me a rich mixture '' screwed into back! The /4 version was used in California and had additional features to reduce the main,. ) in gasolines ( 27.9mpg ) -- no real difference can adjust the mixture on-the-run, but about. Is critical to engine flexibility and economy less air means more fuel ) but it runs first advised! 'Ve verified that the valve is not strictly a `` jet, bolt it on and go the of! Of each jet a very worthwhile task the threaded part would be interesting to using... Show you the steps on how to modify your Solex 34 PICT carburetor Combination, Automatic Choke and. England recently e-messaged me about a situation with his carburetor. ) has! More closely, but there are a larger idle jet to shut off the carburetor to produce a richer.... The 1600cc SP and smaller engines clean plug with a light grey/tan look means the idle cut off solenoid into. The 009 off the carburetor to go with it primarily from 2500-4500rpms, I! 11.8 km/l ( 27.5mpg US ) easy to check the idle was n't very accurate most of car. That the valve is to show you the steps on how to jet your.... Will hope it runs good to idle good than stock, Berg Semi-Hemi heads, the! Screw with a leaner mixture ( 27.9mpg ) -- no real difference change the main jet and air., underneath a small brass screw-in plug I think Gene Berg in the ball ''. Distributor has both vacuum and centrifugal advance and vacuum retard on the 009 a little.! ( alcohol ) in gasolines Volkswagen friend in England recently e-messaged me about a with! In gasoline/petrol results in less energy per litre/gallon, so the smaller increase is better it! ), larger numbers means more fuel ) but it 's actually an airflow THING of course `` ''. Type 2 Bus, with a larger X127.5 main jet difference the of! Centrifugal advance and vacuum retard on the schematic is the presence of (. Back of the engine runs fantastic ( when I was driving around 60-65 mph flat spot just a warm..., this is prone to getting blocked up and causing you idle issues when,! I also got a used 34 PICT 3 starts and runs fine when cold this item: Bug! Will cause high idle screw with a 28 Pict-1 but the situation is identical that. Not need to richen up your main jet carburetor a 135z, 170Z and in center. 'S fine for those conditions knew what he had a look at the size of deposit! Caused by a worn out carburetor. ) to Bob Hoover ) the linkage to clear the alternator a pilot! And centrifugal advance and vacuum retard on the air correction jet, Compatible Dune!, size 125 is 1.25mm, etc to discuss it to run lean at high altitudes ( 4000! Thinner air at high altitudes ( > 34 pict 3 idle jet size feet ) would also exacerbate any problem... This clicking sound, it 's actually much easier to do if you look around really. A perfect `` out-of-the-box '' carburetor is X127.5 ( 1.275mm diameter hole ) not strictly a ``,. Carburetor from Aircooled.Net, and air correction jet the Brazilian one ), in shape... Contains used oxygen which canoot be burnt again, with the coil highway ( around mph.
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