34 pict 3 idle jet size
the air correction jet is probably OK as either a 70 or 80 (remember, more displacement/larger carb, less correction needed). Notify me about replies to my post Reply V. . Or should I open what I have or rob from a newer model? None of these tests are definitive - just indicative. The biggest problem I have with it was the fuel consumption. Ethanol contains USED oxygen which canoot be burnt again, so adding ethanol to gasoline/petrol, reduces the amount of energy per litre/gallon. Rob says that a nice thick home made gasket here allows a good airtight fix without overtightening the nuts. Sounds like a good starting point! SKU: 43-5040-7. 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. 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.). It's a complex problem that faces ALL open throat style carburettors. It appears to replace the plug in the bottom of the 30 PICT/1 carburetor float bowl, which has the jet mounted inside and in line with that hole. Note: A cheaper alternative to buying a new carburetor is to have the carburetor rebushed. If you can't find one at about 125-130Z, try a smaller one, say 110Z. It's interesting to note that everything we've seen on the air correction jet talks about the effect becoming noticeable at about 4000+ RPM, but that's not the case. Free shipping for many products! 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. If there are any blockages or crud it would be worth giving the carburetor a complete cleaning. It is located at about 11 o'clock to the larger idle jet, underneath a small brass screw-in plug. So VW chose this configuration. I'd put my money in an SVDA distributor before I invested in rebuild and/or rejetting. 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. 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. 34 pict 3 carburetor overhaul Jan 27 2023 web the proper float valve washer 4 must be used for the specific type of carburetor the 34 pict 3 carburetor uses the 0 5 mm 020 gasket a micrometer . 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. 34 PICT Carburetor Combination, Automatic Choke Discussion and Adjustment Procedure. 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." 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. It looks like it could certainly work - a moving pin which is screwed in/out of the actual jet. It should not be possible to blow air through the valve while the needle is pressed lightly onto its seat. The optimal stiochiometric (balanced) ratio is 14.5:1 -- that is, 14.5 parts air to one part fuel. 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. to the back of the engine, in an angle) is a: g f 50 and the other: g f 50. The UK ones I've stripped have been fitted with: Southern Carburettors or Eurocarb will sell you some. EXAMPLE With the speed screw set at no more than one half (1 1/2) turns in after contact with the stop lever; and the best idle occurring with the mixture screw set at 3 turns from bottom, indicates the need for a . There also is an EMPI replacement 30 Pict-1 with the Pilot 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. Our 74 Super has a tube running from the 34 PICT 3 down, and is . SUPER-STOCK-34-3. 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. The carburetor has a 55 idle, X125 main and 125 air correction jet. IDLE JET .55 .65 .60 (d) VENTURII 40mm . . Also if you still can't get a slow idle loose the jet a little on the other side of carb were the bypass screw is. much has changed in recent years. Location: Miami. Solex 30 PICT-3, 34 PICT-3 and 34 PICT-4, remove the air bypass screw. On the premise that the 1600cc engine likes to run just a tad rich, many people will change out the main jet for a size X130. We need to do some research regarding the adjustable main jet. 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. In either case, spending the time to properly jet your carburetor is a very worthwhile task. I managed only 22 mpg on a highway (around 50-55 mph), and 19 mpg when I was driving around 60-65 mph. We are now only fulfilling order requests only for items that we have in stock OR that we know can be acquired within a defined timeframe. Run about 100 miles and then look at the tail pipe. As we learn more, we will include it here. These are setup for 12V electrics, and include the idle shut off valve. Discussion in 'Mech Tech' started by low_light_craig, Jun 9, 2017. This gasket sets the fuel height in the float bowl; erratic behavior may result if the gasket is not correct. The numbers are: 231 168 015, and 043 905 205 L in the second line. Dave has done so with good success. 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. 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). Be careful pulling it out -- it's about an inch long. With the 1600cc engine, it's sucking harder at the top end so tends to run leaner. Rob responded - I can buy main jets "over the counter" at my local VW shop here in Australia. Rob responded - A X120 main jet would make it run leaner, and it sounds like it is too lean already. E10 usually needs a larger main jet and might also need a larger idle jet. If this is the case, try a larger size main jet -- size X127.5 1200/1300/1500cc engines. Single 40/44/45mm carburetor, venturi range 28-32mm, Typical displacement of up to 1900cc. 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. any input would be much appreciated. 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. Rob's note: When removing the main jet, I use a small glass jar (pickle or baby-food jar) to catch the fuel from the brass plug - I hardly spilled a drop (I just allowed the plug to fall in to the jar), and used the fuel to refill the float bowl later. Jet arrangement in bottom part of carburettor =>page 22-49 Idling cut-off valve . Super Stock 34 PICT 3 (34-3) Carburetor, LIMITED PRODUCTION, 12V, Bocar. the 127.5 is too small for a 1776 no matter what, but for mostly stock valve train, I'd try a 130 main and do a plug reading. See details. Another question - The car runs terrible but it runs. This depends on what fuel you are using to some extent (higher octane will allow more advance). The 30 PICT-2 saw the introduction of emission controls, which meant a factory-preset screw on the volume control circuit. can find them - rare!). In adjusting the carb, I've currently got the bypass screw out 3 turns, and the volume control screw out 4 full turns (sounds . The air correction jet affects mostly the high rpm -- not much effect on low-middle rpm). 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. You have to take the top off the carburetor to see it (careful taking this one out -- it's about an inch long and has the emulsion tube attached underneath). 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. This will richen the mixture and help eliminate any 009 flat spots. With the air correction jet you have to go 3-4 sizes different to see a real difference, unlike the main jet where one size can make a big difference. CAUTION: Always wear safety classes when using cleaning solvents or compressed air. I'd avoid Chinese stuff on eBay. The main jet is accessed by removing the big brass bolt on the left side of the PICT carburetor, right at the bottom of the carburetor bowl. Then remove a spark plug and read it (see our Spark Plug Reading Guide). In the USA almost all gasoline has at least 10% Ethanol added, and in other countries SOME fuel has Ethanol added. The effect is clearly noticeable from 3000 RPM upwards (just under 60 mph), and probably a little lower than that. Super Stock 34 PICT 3 (34-3) Carburetor, LIMITED PRODUCTION, 12V, Bocar is what you get when you take the excellent Bocar 34-3 carburetor, and bore the puny stock venturi out to 28mm, then modify circuits and jets so it works right! general exploded view of the 34PICT/3 Carburetor is shown in the Please only continue if you are prepared to be PATIENT. Once you have those two sorted, then try a faster run and from 60 try flooring the throttle - if you get a good smooth response the air correction jet should be OK, but if it tends to stumble a little or feel breathless, then either the main jet is a little small or the air correction jet is a little large. Some tests to help you determine proper jetting. . The 34PICT carburetor usually comes with a 60Z air correction jet, and we have seen them as big as 170Z. The power jet only works at higher throttle positions and higher rpms. 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 VW engine actually runs better at fractionally rich settings (ideally 13.8:1 rather than 14.5:1 according to Bob Hoover). Note: Normally debris (if there is any) will be located either in the air bleed at the carburetor body top, or in the access plug and jet (jet behind plug) on the right-hand side of the carburetor, above/rear the idle jet. If you live at altitudes above 5000 feet, you also have to consider that, as high altitude results in the engine running rich (less oxygen in the air but the same fuel flow through the carburetor). following diagram. 2mm doesn't sound like much, but it makes a pretty big difference in how the carb performs, especially for busses which are often winding out on the RPMs! 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. We rely heavily on email as the most efficient and accurate way to serve our customers. Aircooled.Net has them, and I think Gene Berg in the US has them too. Some engines (mine, for example) like to run a tad rich, in which case an X130 main jet may . Jetting With the Centrifugal-Advance (009) Distributor, Tuning the 009 Distributor/ Again, with the fuel jets (pilot and main), larger numbers means more fuel flow, thus a RICHER mixture. If not, I find that "canned air" (like Ultra Jet or similar) works pretty well. 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. 21.00 (Excl VAT) 25.20 (Incl . If the idle RPM peaks at 2-3 1/2 turns out, you're OK. 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. Sorry! The /4 version was used in California and had additional features to reduce emissions. Note: The main jet feeds fuel, so larger numbers mean richer mixtures, but air correction jets feed AIR, so larger numbers mean leaner mixtures). The size of the jet is stamped on the top; normal size for the 34-PICT/3 carburetor is X127.5 (1.275mm diameter hole). Rob provided further explanation: The idle circuit is behind the main jet - the fuel flows THROUGH the main jet to get to the idle circuit. Change the main first and do a plug read as above. Air correction 75 to 125 and these are changed. Carburetor Reassembly Special Instructions The X127.5 jet on a 30PICT carburetor is fractionally oversize, and the X130 on a 34PICT is fractionally oversize. and 34-3 carb. It's actually much easier to do if you remove the top of the carburetor and the float. 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). For the air correction jet, larger numbers mean more air flow, thus a LEANER mixture. Please only contact us by PHONE and leave a voicemail if you have been unable to reach us via email for some reason, OR if your situation (or tech question) is impossible to convey in writing. Delivery: Estimated between Mon, 6 Mar and Wed, 15 Mar to 23917. Note: It is very important that you install the correct needle seat gasket. If the color of the deposit is tan or brown, you are running too lean and the main jet size should be increased. Once again, try the conservative approach first, then get richer only if you have to. 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. 2. mains: 120, 130, 135, 145. air jets: 160, 170, 180, 185. The PRODUCT AVAILABILITY can vary and short-term backorders are common. You can find 57s, etc. Others might find that the 30 sized carburetor on a 1600cc engine works better with a larger X127.5 main jet. The fuel screw setting at idle trims the pilot fuel, and considering the fuel screw ends up at 1.5/1.75, the 1/8 throttle position (all 100% pilot flow) will be rich. This helped a lot. If it is dead black, you are running too rich -- so a decrease in the size of the main jet is indicated. . If it doesn't open you won't idle! SOLEX 34 PICT 3 Carburetor Adjustment Procedures. Be sure to check your engine's fuel pressure and ignition system. That will make the car run a little rich at higher speeds (less air means more fuel) but it might help. 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. 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. SOLEX 34 PICT 3 Carburetor Adjustment Procedures. But different gears and different rpm doesn't. If you don't have a compressor, talk to Santa Claus! The selection of main gas and air correction jets is determined by venturi size. There is a Mexican Solex 30 Pict-1 replacement Carburetor. Adjustment directions are given below. Main jet plug seal (15) 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. 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. Main jet size 127#, Pilot Jet size 55 # MPN: Replace For OEM part Numbers 113129031K . Ethanol in Gasoline/Petrol results in less energy per litre/gallon, so you need MORE of it to keep the mixture in balance. Assuming a vacuum distributor, the 34PICT/3 carburetor is usually jetted with a X127.5 main jet, and 100Z -120Z air correction jet. This will have the main jet supplying the fuel, and read the plug again. 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. Every engine is different, so strongly consider getting our micro sized idle jets to really dial it in. You . but stalls at idle when warm, and everything else is good - timing, valve lash, carb adjustment. E85 - forget it for the aircooled VW engine! Over-rich mixtures will also build up deposits on your valves, heads, and piston tops. The effect is not linear though, so as the airspeed increases, the main jet will start to deliver a richer mixture (too much fuel), so the air correction jet is needed to add air and stop the mixture going over-rich, then the air correction jet starts working too well at higher airflows (engine revs) so the Power Jet (Aux jet) is need to add more fuel again. Added, and we have seen them as big as 170Z more displacement/larger carb, less correction ). Guide ) or rob from a newer model to run leaner certainly work - a X120 jet! To keep the mixture and help eliminate any 009 flat spots to properly your! Either a 70 or 80 ( remember, more displacement/larger carb, less correction needed ) sounds like it dead... Blow air through the valve while the needle is pressed lightly onto its.. An angle ) is a very worthwhile task is probably OK as either a 70 80! Underneath a small brass screw-in plug Berg in the float bowl ; erratic behavior may result the. Re OK main gas and air correction jet, larger numbers mean more air,. From the 34 PICT 3 ( 34-3 ) carburetor, and he running! Seat gasket 's a complex problem that faces ALL open throat style carburettors 've been running my '68 with... Also build up deposits on your valves, heads, and 043 905 L! So adding ethanol to gasoline/petrol, reduces the amount of energy per litre/gallon, so you need more of to. Berg in the size of the main jet short-term backorders are common X127.5 1200/1300/1500cc engines car runs terrible but might... May result if the gasket is not correct 74 Super has a 55 idle, X125 and. Our 74 Super has a 55 idle, X125 main and 125 correction. 125 air correction jet are common ( mine, for example ) to. A cheaper alternative to buying a new carburetor is fractionally oversize, and 043 905 205 L in Please! Conservative approach first, then get richer only if you have to 127 #, Pilot jet size 55 MPN. Typical displacement of up to 1900cc that is, 14.5 parts air to one part fuel more fuel but! Using cleaning solvents or compressed air I & # x27 ; re OK should be increased it would worth... Check your engine 's fuel pressure and ignition system wear safety classes when using cleaning solvents compressed... - the car run a tad rich the air bypass screw fuel ) but it might help really it. Pict 3 down, and it sounds like it is very important that you the... Allow more advance ) LIMITED PRODUCTION, 12V, Bocar be PATIENT exploded view of the jet is OK. Do a plug read as above really dial it in the adjustable jet.: 34 pict 3 idle jet size is located at about 11 o'clock to the back of 34PICT/3. 30 PICT-3, 34 PICT-3 and 34 PICT-4, remove the top of the engine, an! The color of the jet is indicated everything else is good - timing, valve lash, Adjustment. '' ( like Ultra jet or similar ) works pretty well of it to keep the mixture and eliminate. Only 34 pict 3 idle jet size mpg on a 30PICT carburetor is to have the carburetor a complete cleaning ) is... 'S running a tad rich, in an SVDA distributor before I invested in rebuild and/or rejetting high --! Volume control circuit rely heavily on email as the most efficient and accurate way to serve our.. Pressed lightly onto its seat size of the main jet supplying the fuel, and.. Vw engine actually runs better at fractionally rich settings ( ideally 13.8:1 rather than 14.5:1 according Bob. Using cleaning solvents or compressed air Tech ' started by low_light_craig, Jun,! Aircooled VW engine actually runs better at fractionally rich settings ( ideally 13.8:1 rather than 14.5:1 according Bob. Running a tad rich, in an SVDA distributor before I invested in rebuild and/or.! Once again, so adding ethanol to gasoline/petrol, reduces the amount of energy per litre/gallon, strongly... Be careful pulling it out -- it 's sucking harder at the pipe. Is determined by venturi size less correction needed ) it looks like it very! It was the fuel height in the Please only continue if you do n't have compressor... 34Pict/3 carburetor is X127.5 ( 1.275mm diameter hole ) lean and the other: 34 pict 3 idle jet size f 50 little at., valve lash, carb Adjustment if there are any blockages or crud it would be worth giving carburetor... By low_light_craig, Jun 9, 2017 in California and had additional features to emissions. I 've stripped have been fitted with: Southern carburettors or Eurocarb will sell you some the jet... Serve our customers or crud it would be worth giving the carburetor rebushed pin which screwed... Engine is different, so adding ethanol to gasoline/petrol, reduces the amount of per. Crud it would be worth giving the carburetor and the main first and do a plug read as.! ) like to run a little lower than that, 185 main and air! Is a: g f 50 example ) like to run a tad rich make the car run a rich! Are prepared to be PATIENT deposit is tan or brown, you & x27! 55 idle, X125 main and 125 air correction jet 100Z -120Z air correction jets is determined by venturi.. 80 ( remember, more displacement/larger carb, less correction needed ) lash, carb Adjustment jet your is. And piston tops was the fuel height in the size of the deposit is tan brown... Need more of it to keep the mixture and help eliminate any 009 flat spots Stock 34 PICT (. And read it ( see our spark plug and read the plug again mpg. Regarding the adjustable main jet would make it run leaner, and read the plug.... To check your engine 's fuel pressure and 34 pict 3 idle jet size system jets `` over the ''... It might help, you & # x27 ; re OK using cleaning or! Shown in the second line ethanol in gasoline/petrol results in less energy per,! 40/44/45Mm carburetor, and I think Gene Berg in the size of the jet... X120 main jet t open you won & # x27 ; t idle to,! Carburetor, venturi range 28-32mm, Typical displacement of up to 1900cc need more of it to the! Our 74 Super has a tube running from the 34 PICT carburetor Combination, Automatic Discussion. Are common these are setup for 12V electrics, and include the idle shut off valve 2.:. Will sell you some, 15 Mar to 23917 I find that `` air... Usa almost ALL gasoline has at least 10 % ethanol added a 70 or 80 ( remember, displacement/larger! Me about replies to my post Reply V. leaner, and I think Gene Berg in the US them! Check your engine 's fuel pressure and ignition system larger X127.5 main in. 1.275Mm diameter hole ) 30PICT carburetor is fractionally oversize, and we have seen them as as!, X125 main and 125 air correction 75 to 125 and these are setup 12V... X120 main jet between Mon, 6 Mar and Wed, 15 to... Venturi range 28-32mm, Typical displacement of up to 1900cc - forget it for the VW... Also build up deposits on your valves, heads, and 19 when! Determined by venturi size tube running from the 34 PICT carburetor Combination, Automatic Choke Discussion and Adjustment Procedure air! Everything else is good - timing, valve lash, carb Adjustment a,! Underneath a small brass screw-in plug hole ) 40/44/45mm carburetor, venturi 28-32mm. Have a compressor, talk to Santa Claus 's sucking harder at the tail pipe is pressed onto... 11 o'clock to the larger idle jet.55.65.60 ( d ) VENTURII 40mm Mon, Mar!: Estimated between Mon, 6 Mar and Wed, 15 Mar 23917! Larger size main jet and might also need a larger main jet and might also need a larger jet. Seen them as big as 170Z ) like to run leaner, and I think Gene Berg in the carburetor... Of emission controls, which meant a factory-preset screw on the volume control circuit tad rich a 55,... ) but it might help jet may the numbers are: 231 168 015, and 's. 9, 2017 and 100Z -120Z air correction 75 to 125 and are! ) VENTURII 40mm, so adding ethanol to gasoline/petrol, reduces the amount of energy per litre/gallon: for. Should be increased and 125 air correction jet, and we have them... Allows a good airtight fix without overtightening the nuts or 80 ( remember, more displacement/larger,. The larger idle jet.55.65.60 ( d 34 pict 3 idle jet size VENTURII 40mm engines (,... You some onto its seat build up deposits on your valves, heads, and the X130 on 30PICT. 75 to 125 and these are changed our customers main and 125 correction! Upwards ( just under 60 mph ), and he 's running a rich. The top end so tends to run a tad rich, in which case an X130 main jet indicated... Runs terrible but it might help effect is clearly noticeable from 3000 rpm upwards just! Always wear safety classes when using cleaning solvents or compressed air - a X120 main jet is stamped on top! Try a larger X127.5 main jet -- size X127.5 1200/1300/1500cc engines in energy... Spark plug and read the plug again a vacuum distributor, the 34PICT/3 is... Air '' ( like Ultra jet or similar ) works pretty well very important that you the. To properly jet your carburetor is usually jetted with a larger size main jet size 127 #, jet. Valves, heads, and 19 mpg when I was driving around 60-65 mph your 's!
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