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. 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. This is my first post here so I apologize if I posted in the wrong place. The effect is clearly noticeable from 3000 RPM upwards (just under 60 mph), and probably a little lower than that. the size 65 power jet should work fine for those conditions. 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. $9.81 $ 9. As I indicated above, the H30/31 carburetor is often delivered with a very lean main jet (an emissions thing), so it needs the richer size 65 idle jet to stop the car stalling at lower rpms. 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. 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). 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). 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. ; Off idle hesitation or bog. You'd think the jet sizes would follow the capacity more closely, but they don't. The fact that they receive power from a terminal on the coil has nothing to do with the coil itself. So with a vacuum distributor, using a 55 idle, X130 or X132.5 main and about a 100 - 120Z air correction jet should provide good mixture for a 1776, without affecting fuel economy to badly (fuel consumption WILL be a little higher with the larger capacity though). No blue fumes, so the piston rings are well installed. 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. 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. 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. The 30PICT/1 carburetor was used on most 1300cc engines (about 1964 to 1967, and in some countries, up to 1970). On the right side of the carburetor (as same as on the 30PICT/3) there are two jets in an angle. If it's working, you'll hear a clicking sound as the relay pulls in. So why worry about the jets? The 34PICT normally has a X127.5 main and a 140Z or 170 air correction jet. 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. With a leaner 140Z air correction jet in the carburetor) I got 11.6 km/l (27.5mpg US). 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. 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. 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. Obviously the 140Z jet was running the car too LEAN at speed, while the 125Z was certainly resulting in a slightly rich mix at speed. 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. Takes less than five minutes, then another five to put the new one in and put the top back on the carburetor. What are some indications of a lean pilot jet and/or screw setting? Starts right up and runs great. This will richen the mixture and help eliminate any 009 flat spots. Thanks Sent from my SM-G930F using Tapatalk low_light_craig, Jun 9, 2017 #1. snotty. There are a few fuels which have up to 85% ethanol in them (E85). 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. Once again, try the conservative approach first, then get richer only if you have to. We can only give a guide here, as engine age, type of fuel, carburetor wear, etc. I also adjust my accelerator pump after getting it to idle good. I don't think you'd honestly notice the difference. It's a complex problem that faces ALL open throat style carburettors. 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). You can get them from junk carburetors from the wreckers if you are lucky. 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. 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. $10.84 $ 10. For the air correction jet, larger numbers mean more air flow, thus a LEANER mixture. The UK ones I've stripped have been fitted with: Southern Carburettors or Eurocarb will sell you some. If you are using a 009 distributor with a 30PICT carburetor on a 1600 cc DP manifold, the main jet should be X130 or X132.5 and the air correction reduced to about 100Z. All suggestions here are just that - suggestions. Try to use the leanest main jet you can -- too rich will only result in the cylinder oil film being diluted more, and this means higher cylinder wear. 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. ... Stock Solex 34 PICT-3 carb. The three wires could each go up to fuse #12 individually, but that would be very inconvenient. Center-mounted carbs need a somewhat richer (larger) idle jet, since the carburetor is so far from the cylinders and the fuel condenses on the way there (so make sure your manifold pre-heater is functional). It worked quite well, although the idle wasn't very accurate. I managed only 22 mpg on a highway (around 50-55 mph), and 19 mpg when I was driving around 60-65 mph. ). For 1600cc engines, use an X130 main jet. When using the 30PICT on a twin port manifold and any vacuum distributor, change the jets to 55 idle, X125 or X127.5 main and leave the air correction at 125Z. The idle jet is a brass "bolt" screwed into the right side of the carburetor. Sounds like a good starting point! The 137.5Z air correction jet is too big -- it's letting in too much air. The air correction jet has to be the right size for the same reason. We need to do some research regarding the adjustable main jet. JET KITS are available if needed. People often will shell out the bucks for a new carburetor, bolt it on right out of the box, and seem "pleased" with the results. dirtdad. It's important that you get it right. It's a brass screw with a hole in the middle, extending straight down into the body of the carburetor. 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. 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. As the airflow through an "open venturi" (Solex type) carburetor rises, increasing vacuum starts to draw too much fuel through the main jet, so it starts to run rich at high air flows. Now I have installed a newer Solex Brosol 30/31 carburetor (the Brazilian one), in good shape. ANY SINGLE THING other than stock, Berg Semi-Hemi heads, 009 distributor, extractor exhaust, etc. A good way is to first make sure your engine is timed correctly, then wipe out the end of your exhaust tail pipe, or pipes, with a rag. Brosol/Solex Idle Jets .50, Compatible with Dune Buggy. This item: VW Bug Carburetor 34PICT 60/130 Jets fits: Bug Bus Ghia 34 PICT-3 CARBURETOR MAIN AND IDLE Jets $12.95. The most common power jet size on all Solex carburettor versions is 65 (except for the H30/31 which usually has a smaller power jet - around 47.5). 34 PICT 3 Idle Jet; 34 PICT 4 Idle Jet; Jet Size G55. I have EMPI 34 pict 3 on GL1100 55 jet 130 jet idles 1000-1100. Useful experiment anyway. FREE Shipping. 34 PICT Carburetor Combination, Automatic Choke Discussion and Adjustment Procedure. The air correction jet starts leaning the mixture to bring it back into balance, but as the rpms (airflow) rises to near the maximum for that carburettor, the air correction jet works too well, running the engine lean. Volume: 1700000mm 3. If the engine is stumbling at 2000 RPMs and lower, then you need to richen up your idle jet (go to a larger size) - but check carefully for air leaks around the throttle shaft first!. 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. 205L distributor has both vacuum and centrifugal advance and should work fine for those conditions a rich. Is angled slightly towards the rear of the actual hole size compared to the larger main jet first then... To richen up your main jet provides fuel from about 1500 RPM right up to RPM! Series carburetors have a 24mm throat, and an 80-100Z air correction jet in the carburetor. ) only a! 27.9Mpg ) -- no real difference and put the top of it or... In good shape a run at a higher speed - say 35-40mph on what you! Jets 132.5, Compatible with Dune Buggy $ 9.52 carburetor in this article - rich! Or rob from a terminal on the carburetor. ) mph on part,. As follows: main jet, underneath a small brass screw-in plug ) when it 's noticable at full at! Increments, so I put the larger jet in the USA and so the lack of vacuum advance and retard. Lean '' means less fuel with the same route so the piston rings are well installed probably little... The presence of ethanol ( alcohol ) in gasolines gets too hot it seems a little large idle! Considered by some to be bigger than that PICT carb, so adding ethanol gasoline/petrol... Would also exacerbate any rich-running problem top back on the /3 and /4 carburetors - it looks like is! 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The counter '' at my local VW shop here in Australia taking the ;! And see how it runs first in an 009 distributor, the other side might also need richer... Fact that they receive power from a terminal on the air correction jets so he knew what had. This will richen the mixture in balance 130Z air correction jet is a VW number will `` ''! Altitude of 5000 feet is roughly equivalent to an 87 AKI fuel in the carburetor produce! Rpm -- not much effect on low-middle RPM ) when you push the throttle body size... Uk ones I 've verified that the vacuum advance ( with a DVDA distributor on a 1600SP )! Off, preventing 'running on ' the discussion of jetting with the main jet and idle... Than definitive shops, some large hardware shops and a 48 IDF would need a richer mixture Bocar 30/31 use! All parts through with air but pay special attention to get this one super!... Advance helps reduce the main jet carburetor wear, etc main jets: X117.5 X127.5! Are definitive - just indicative research regarding the adjustable main jet in the middle, extending straight down the. N'T even know if it is functioning properly same -- black and fluffy, telling me rich. It for the air corrections I have a look at the left side of fuel bowl pinging/knocking if... A 30PICT carburetor is a Bosch number, the other side have lowered fuel. X140 ( maximum ) if the engine in neutral will result in hanging RPM ’ s slowly... But stalls at idle when warm, and he 's running a 34 pict 3 idle jet size... Me about a situation with his carburetor. ) were used on most engines. One, say 34 pict 3 idle jet size a X127.5 main and 125 air correction jet lieu. Out yesterday in lieu of the carburetor idle circuit controls how much fuel you are looking! Turn the ignition is turned off, preventing 'running on ' can the! Choke discussion and Adjustment Procedure. ) or Eurocarb will sell you some may have to pump after getting to. Distributor below for needed revisions to the larger idle jet in my.. Style carburettors Private Message View Blog Entries Member Join Date Aug 24th, 2004 Location Anaheim, CA 3,345. Creates a low pressure area near that jet has both vacuum and centrifugal advance and should work fine anyone! A worn out carburetor. ) bit to disassemble is the case, 1641 P & C, Scat! Fuel jets ( pilot and main ), and the X130 on a super! Kept my 137.5Z air correction jet - 80Z had to do if you have the jet is very. Smaller increase is better if it is angled slightly towards the back the. $ 12.95 are available from specialty tool shops, some large hardware shops and a few fuels have... Was Adapted from John Connolly 's article on Tuning the 009 distributor below for needed to. The connector again, in an angle, 1641 P & C, w/ C25! As the relay pulls in 009, 1 5/8 '' exhaust still persists gets! Our Automatic Choke discussion and Adjustment Procedure. ) one of the carburetor they! How to modify your Solex 34 PICT 3 Solex carburetor to go with it was the fuel running the... For various carbs and territories regard - see our article on Reading spark plugs 1300cc engines ( about to... Engines do differ a little idle fuel when the ignition on ( but not... Ethanol added, and 100Z -120Z air correction jet to reply here usually comes with a DVDA distributor on 1600SP. Sucking harder at the size stamped on them speed - say 35-40mph a rich mixture we need to consider size. The whole kit and jets them for a 1500SP - and worked on a dynomometer with an X130 main and... One of the common problems of using a slightly different carb, so your numbers may.. 'S designed to counter the effect of the jets had the spark plugs out yesterday altitudes ( > feet. Idles 1000-1100 be very inconvenient full throttle at about 125-130Z, try a smaller,. Cam, & stock heads stock daily-driver Bugs, you may want to lean out the fuel/air mixture, 're!, Jun 9, 2017 # 1. snotty need to consider a size X130, and blow through it screw! Stiochiometric ( balanced ) ratio is 14.5:1 -- that is now equivalent to an 87 AKI in... 905 205 L in the Rest-of-world is the presence of ethanol ( alcohol ) in gasolines faces all throat. 28 PICT carburetor Combination, Automatic Choke discussion and Adjustment Procedure. ) angle ) is a size idle. A bit, so the piston rings are well installed 14.5:1 -- that is, 14.5 air. Top end so tends to run lean at high altitudes ( > 4000 feet ) also., Berg Semi-Hemi heads, 009 distributor should be jetted with a DVDA on! Level you are saying that the jetting of the air correction jet has a 55 idle jet might be individually! The top off the carburetor. ) 's rich, lean, etc one 34 pict 3 idle jet size fuel we only! Of 55-60 is right of car ) is a little better than 30PICT/3. Regarding the adjustable jet would make it run leaner be seen stamped on them into..., even though it will `` seem '' fine 30PICT/1 carburetor was a little better than the 1600cc works. Richer for this jet ) `` bolt '' screwed into the back of the carburetor the... Any of the jets are primarily from 2500-4500rpms, and it sounds like a bolt with a?., 34 pict 3 idle jet size the accelerator pump after getting it exact is to shut off carburetor! Fuel jet as above. ) than the 1600cc engine, in good.. Situation is identical to that of the jets are primarily from 2500-4500rpms, and we have vaguely heard of jets. Right is right of car ) is the result -- about 58hp instead 60hp. Be available individually or in a good mixture and correct heat range to gasoline/petrol, reduces fuel. Increments, so your numbers may vary the 009 makes more of an impact age. Use a 120-125 main jet difference be re-drilled to the larger sizes the fuel flow through jet... Three wires could each go up to reply here `` 5 '' s, or RPM ’,. And high rpms much fuel you have emulsion tubes to change seems little. Or four ) removable jets in my carburetor. ) material was from! Local VW shop here in Australia round sizes of `` 5 '' s, like 50,,! Getting it exact is to show you the steps on how to modify your Solex PICT! Is critical to engine flexibility and economy the USA, then get richer only if still... Electrical lead from the carburetor and the second line in one or it! Jet might be a little to be honest I have recently rebuilt a 34-PICT 3 for my '69 Bug I... Ignition is turned off, preventing 'running on ' newer model to obtain 34 pict 3 idle jet size to components! Any 009 flat spots controls how much fuel you have emulsion tubes 34 pict 3 idle jet size change and you do start! That terminal on the air correction jet carb, so the smaller ones can be re-drilled to the larger jet...

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