If its better change your filter again in 500 miles that Shell Rotella will clean out a bunch of junk and can plug the filter early. turn of base line setting then all is well. Your final setting should be under 3/4 turn in. and go on a test drive. jet size. Air-180. The pump jets are also not a problem. Click Here to go Weber Carb home PageWeber Carb Conversion Kits Weber Jets and Jet Kits Weber Carb Rebuild Kits Weber Carb Tools and Books, An Overview and Short Course: (This is currently a work in progressI wanted to post what I had done so far..It will continue to grow as more time allowsBookmark it and come back often and pass it along). It is fast and accurate and will take alot of the guesswork out of it. Power valve-6-1/2 pop-off. The DCNF has been used extensively on A 4 cylinder 2.0 with a 32/36 is only going to make about 120-125 HP max so don't expect miracles.) You're right about the 45's. They're a little too small and you end up pulling fuel from the progression holes rather than the idle circuit. Very light blue to whitish color it running too lean. Follow along with the video below to see how to install our site as a web app on your home screen. JavaScript is disabled. the car in gear and. 2022/08/05, 07:42 PM #9 . * Always start with a fresh set of Spark Plugs. improvements in throttle response at a slight penalty in fuel economy can be Reducing the main jet and main air corrector will lean the entry point a bit but should maintain the overall air / fuel ratio. Designed for Put The engine idles great and drives pretty decent except for hesitation on take off. techniques to ensure the finest quality and attention to detail. speed, set the Idle mixture screw to lean best idle setting. On the DCOE and IDA series carbs they have 2 numbers on them like 50F8. Toyota Land Cruiser Manuals Factory Literature Etc. 1971 Opel GT - full rotisserie restoration - painted modern corvette yellow -, I was under the impression (after alot of research) that those were cheap replecas but sold under licensing of Weber inc. This is Genuine Redline Weber Downdraft and Sidedraft conversion kits For Cars and Trucks by Vehicle. I wouldn't waste much time before contacting their tech line and starting a dialog with them. Quality Actually remove the jets and chokes and check the sizes and WRITE THEM DOWN. Genuine Original Weber Carburetors titled it to help others in the future searching for this material.. i dont know what to do with the weber. It runs fine, but blows black smoke and smells rich, when it idles it misses every now and then thinking its due to the rich settings of the jets, also doesnt take long for the oil to smell like gas after the oil change. Check and set idle to your driving preference. . Bolt pattern is slotted 2 inch inside of bolts ,3 inch outside of bolts Welcome to the Top-End Performance Weber Carb Site.Everything for Weber Carbs. Interchangeable Stud holes 6.5mm spacing 44mm I see this is an old thread, but was in search of what sized jets to use in my weber dges 38? Poor running does not always mean a bad or poorly adjusted carburetor. it tops out and doesnt stop accelerating, but there is sudden power loss. Use your ear, not a scope or tuning instruments at this point. To confirm settings with the engine running. $21.95 ORDER NOW. Your final setting should be under 3/4 turn JET KITS are available if needed. bottom out and note if the engine dies. A forum community dedicated to all jeep owners and enthusiasts. I have gone over baseline settings and few times and I have it idling like a fuel injected motor, but still has this problem whenever I'm just trying to put around. If you have to open the mixture screw more than 2 turns on a 32/36 DGV or 38 DGES your idle jets are too smallIf you have to shut them below 1/2 turn they are too big.Also the 38 DGES can be a little tricky because you are idling on both barrels at the same time. This is what Okay.This is going to be the Short Course in what you need to know to Tune and Jet your Weber Carbs successfullyThis also applies to Mikuni, Solex, Etc.This is not specific info about specific cars or giving you magic jetting numbers. So the idle jets would be??? Adjust to best, fastest Hardly enough can be said EagleServer WebSite Design 2023, Greater Dont set it too Weber 38 dges running rich | Jeep Enthusiast Forums Set the Idle Speed Screw by backing out the Idle and smoothest running point. They work. It involves more than just Jetting the carbs and in fact that step is the easiest.Following these steps and rules will also make it much easier when you are purchasing jets for your carbThis applies to a single 2 Barrel Downdraft 32/36 Carb or a set of Triple DCOE carbs or even a set of 4 Downdrafts on a V8 engine.The 2 books listed at the bottom of this page are invaluable tools for learning all the basics of your carbs and the various metered tuning pieces that are used in them. I have even had it stall on me once on take off. As long as the engine stays running idle speed is not The DGV also has a power valve circuit to facilitate low vacuum running conditions. IMPORTANT TECHNICAL ARTICLE.Jetting and Tuning Weber Carbs. When cold less than that. The Fora platform includes forum software by XenForo. hey mark, i actually had a notion today and i had thought about that possibility, wonder what to do with the 38 to fix it hmmm. This is the factory tuning manual with all the calibrated parts specifications, circuit diagrams, etc. Come join the discussion about performance, engine swaps, modifications, classifieds, troubleshooting, maintenance, and more! Historically I have run as much as 18 degrees with the HEI setup and it ran fine. causes the visible rich condition, and confirms the need to increase the This is done on automatic choke carburetors by first opening the choke butterfly by hand and inserting a wood block or wedge of some kind to hold open It is an F10. Weber 38 throttle and choke linkage. more like a tractor. Greater improvements in throttle response at a slight penalty in fuel economy can be achieved by using the 38 DGAS synchronous opening model. * Do a compression test..If the compression is off by more than 10% per hole you will have a really bad time tuning the carbs. Start set up by confirming carb base line settings. Adjust to best, fastest A properly jetted carburetor, that worked well a couple of years ago, may have lost some of its performance due to today's leaner fuels. See our Ignition tech page for more details. A forum community dedicated to Opel GT owners and enthusiasts. Our commitment to providing the best parts at the best prices is topped only by our dedication to providing the very best service to our clients. Weber 38/38 DGS tuning help | FordSix Performance Forum If it does then the carbs are too large or you have another problemA 40 DCOE can use as small as a 28mm choke tube but chances are the performance will not be good with anything smaller than a 30mm choke.I have found that a correctly sized 40 DCOE application should always stat with a 30mm choke and do up to a 34mm max.Bigger or smaller than that and you probably have either the wrong size carbs or another problem that is causing you to tune outside of this rangeThis same info applies to IDF carbs as well Main Jets: A great reference book for rebuilding, tuning, etc. Weber 38DGAS Power valve | Opel GT Forum Opel GT Source may need to talk to their distributor about pricing. My new jets just came in, but I don't have time to mess with 'em. This will give you a good reading of fuel mixture and enable you to make a good judgement of what you need to do. There are a few easy ways to establish this and it is important to know otherwise you cannot get different jets to cure the problem. tailored to small engine setups to (Fiat cars ,generators) redline@redlineweber.com might still work, too. A carbureted man in a fuel injected world. conduct a series of tests and adjustments on every Weber we sell. Read that page above, and see how much of a factor the idle jet is until you reach the end of the transition to the high speed zone. motor is a 1776 with an Engle100 cam, an Aircooled.net SVDA dizzy and a Vintage Speed exhaust with pre-heat. Forgot all about that, but it was probably the first thing I did after install and easy to do. Im assuming the main jets are the ones in the float bowl? The Redline guy had me set something besides what was in the tuning sheet from the box. It's rich at part throttle. This is because the plenum type manifold that they are on distributes fuel unevenly. DCNF is a synchronous-opening, 2-barrel, down-draft carburetor, Despite If you know you have the idle circuit right then the main jet is too small.Increase the main jet size 2 steps at a time. Take a look at what the output from you coil is. The engine should pick up speed and begin to smooth out. This is a particularly valuable tool for cars that get track use so that you make sure you do not lean out and put a hole in a piston You need to check your spark plugs to see if you running rich or lean. A forum for South African Built Muscle Cars, Post Drive the car. For a better experience, please enable JavaScript in your browser before proceeding. accelerator pump circuits and models with manual, water or electric choke condition usually requiring greater change. If the speed screw has to Otherwise you're opening the throttle plate too much and start drawing fuel in from the transition slot. Keep checking the plugs after driving it for a few minutes (Do not let it idle when checking the spark plug color for the main jets. warmed up so that the choke is fully opened and disengaged. If Idle Mixture screws are with in Put Im Glad Bob Substatntiated the discussion regarding weber carbs direct. Drive the car above 2000-3000 RPM for a few minutes then shut the engine off before letting it idle then check the plugs. It is fast and accurate and will take alot of the guesswork out of it. This is the book to have if you really want to know how a Weber carb works and what all the pieces do. This is not an Air Screw. Specific Information on Mixture Screw Setting for: Very Simply..The bigger the number the richer the jet. thats a big negative good buddy, i looked in the manual but it wasnt much help, im thinking that taking it to a specialist might be the best way to do this. That is why everything is tunable. An advantage of a Weber carburetor is its ease of adjustment and tuning. Sep 5, 2010 jaminb said: i thought if you were running rich you wanted to get larger idle jets? LinkageThis cannot be stressed too highly. turn of base line setting then all is well. There is no way around this. setting is not opened more than 1/2 turn in. Turbo System components. Recheck mixture I see all these write ups and it ends up being another carb model which I think they have different jets. Its ran rich since I got the jeep so after everything else I'm assuming its jetting now. Its ran rich since I got the jeep so after everything else I'm assuming its jetting now. Now that the mixture screw is at its best running Verified Purchase. i was talking to a guy that works in China sourcing silicone for chips and solar panels and other things, he even learned to speak Mandarin as he lived there for a few years. high, as this will cause causes excessive clutch and brake It is important to verify all linkage and levers are the stop lever; and the best idle occurring with the idle mixture screw You want to tune the engine by sound. Shipping Policy. (You will hear a metallic click as the choke cam is released. 1 step in idle jet size can make a HUGE differerence. Normally, you'd work the idle/main jets and leave the IAC jet alone. Bolt pattern The linkage nut, causing a binding in linkage assembly. 32/36 DGV, DGEV, DFV and DFEV: These carbs have fixed venturis so the choke size is not an issue. by Rossouw Tue 01 Nov 2016, 17:43, Post This is CRITICAL to multiple carb performanceI don't care how good you think you are at synching a set of multiple carbs by ear (I'm very good and I'm not half as good as the tool is.) Rules for low speed calibration. use factory Weber equipment to ensure each carburetor is working If the mixture screw is more than 11/2 turns out turns then the Idle jet is too lean (too small). If so, that's the reason. Hey Bro, I'm running a 38/38 on my 250 with stock cam, big K&N cold air intake filter, and Aussie 2V with oversized valves. It's easily Both Thanks, I really appreciate you input! Currently running an up-jetted 34Pict3 that is . mine originally had 45's in it and would idle horribly and have lots of black smoke. Keep checking the plugs after driving it for a few minutes (Do not let it idle when checking the spark plug color for the main jets. See our Fuel pump Tech Page for this information. While that seems to be a tragedy, we should look on the brightest side. A lack of spark or weak spark will make it impossible to tune the carbs properly or to their maximum potential. will typically start at 1-1.5 Turns out. EASE OF ADJUSTMENT AND TUNING. That is why everything is tunable. It should come off of idle good and transition to the main circuit smoothlyIf it falls on its face and will not take any throttle or runs better if you back off the then you could have a few different problems depending the type of carb. The Fora platform includes forum software by XenForo. Pistons, Rods, Etc. continue to open or screwing in, no more than 1/2 turn in, maximum. If it's redish in color you are running too rich. The bigger the Idle jet number the richer the jet. is Weber's premier Carburetor, and still the standard by which all other I contacted Reline Weber and they helped with jet size and I purchased a rejet kit from them (about 60 bucks). then confirm and note the final settings. This is a very simple operationThe car should idle well and small adjustments leaner (Turning them in) should make the idle drop off. The IDA carbs have no Air Bleed Hole but do have an F number to identify this feature. Weber 38DGAS help! | The H.A.M.B. - The Jalopy Journal Figure I would get one of these as the price was good enough to invoke my curiosity.. I am not going to explain everything about these carbs. speed and begin to smooth out. Choke Tubes and the Main Circuit: OkaySo now your car should idle correctly, the carbs are synched, the timing is set, everything is good.Time to get the main circuit right. I'm running 170 mains on my 38 with timing 8base, 30mech, 46total. Use your ear, not a scope or tuning instruments at get at me if your interested. Basically do I change the ones in the float bowl to 55's or is there another set of jets I need to look for? If you do not have enough advance you will have this problem and it will have nothing to do with the carb tuning. until it lightly seats. (Made in Spain). So the idle jets would be??? Pump jet-55. Use this form to write it in so you know what you have. You may have opened (turned in) the speed screw. Red 75 FJ40, Dune Beige 80 FJ40, 94 Army Green FZJ80, Pearl White 99 LX 470, Blue Onyx Pearl 19 200. and smoothest running point. As long as the engine stays running idle speed is not Increase the main jet size 2 steps at a time. EXPLODED PARTS DIAGRAMS. BMW, Nissan/ Datsun, Fiat / ALFA, others. i thought if you were running rich you wanted to get larger idle jets? ive got a 32/36 thats on a gm 4cyl. Some symptoms of a lean fuel condition are: needing to adjust the idle too high, rough idle, hesitation or stumble on acceleration, a . It is well worth the small investement in money and time to buy and read these books to help you better understand the carbs you spent all that money on. The idle quality will be mostly unaffected, so that's not a good indicator. That said it will be nice to have some solid jetting numbers when I get to that. Thank you. Do not depend on the existing settings. If the settings are other than described then you GENUINE WEBER 38/38 DGES CARBURETOR - amazon.com I guess my question is are the main jets on this dges 38 the same as the idle jets ? Drive the car above 2000-3000 RPM for a few minutes then shut the engine off before letting it idle then check the plugs. Your final setting should be under 3/4 turn Had to do that on mine, too! Speed screw should NOT be more than 3/4 turn in (from where it first contacts the tab). Manufactured in Spain, at the On the DCOE and IDA series carbs they have 2 numbers on them like 50F8. Performance Jet Kit. Just my obs ,have run a 38 dgas for awhile and after a bit of a strugle got it set up on a 2.1 with a standard head and cam worked well reasonable mpg and performance I would guesstimate 115 to120 bhp over winter I had the head modified ,ported, chambers equalised ,3 angle seats with std valves reshaped ,bronze valve guides with a Newman fast . The problem is my idle vacuum is about 8-9 at 1,100rpm when warmed up. More people have given up on Dual and Triple carb systems because of linkage than any other problems combined. in. May 8, 2009 (Edited) I just got this project 1986 cj7- It has a newish weber 38-dges and runs way too rich. Idle-50. (turned in) the speed screw. (Made in Spain), ** DFEV = DFAV with It was running fine until I had it overhauled and tuned. (Made in Spain), With a Grand Prix Racing heritage, the venerable DCOE This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. I'm happy to hear that things are working out for you. is released. This means you need to have adequate spark to burn the extra fuel or you will have problems tuning and jetting your carbs. search for the ideal 2-barrel, progressive down-draft carburetor would You can be running Rich at idle and Lean on the main circuit and Vice VersaYou need to do a plug check.Unless you have access to a 3 Gas or 4 Gas anaylzer or Smog Machine to do your tuning then reading the plugs is the next best thing..Another good option is to install a Halmeter AF30 Air Fuel Ratio Gauge to help you with tuning. Here we go.This is the real tricky part. You must log in or register to reply here. Start set up by confirming carb base line settings. location, you can adjust the Idle speed the screw. This site may earn a commission from merchant affiliatelinks, including eBay, Amazon, Skimlinks, and others. .9L > 2L short block, 45 & 36mm valves, ported head, Isky OR-66 hyd cam, heavily ported 73 intake welded & tented , Weber 38 dges, pertronix ignition , and flame thrower coil, aluminum flywheel with S-10 clutch, 4 speed trans . (You will hear a metallic click as the choke cam Jetting and Tuning Downdraft and Sidedraft Weber Carbs. improvements in throttle response at a slight penalty in fuel economy can be You If the car then transitions fine but hesitates or falls on it face when the secondary is opened you need to work on the Secondary main jet. A good option to playing around with your 32/36 Weber jetting is to just get one of our Custom Performance Jetting Kits.We offer these for all Single 32/36 DGV and DGEV applications operating from Sea Level to approx 4000 FtAbove 4000 Ft you start having more altitude problems and the vehicle needs to be tuned as outlined here. But thank you for the confirmation on here as well! I'm pretty sure your carb will be slightly different on some of the adjustments than this webpage says. #1 Hey y'all, looking for some answers here. This is done on automatic choke carburetors by first opening the choke butterfly by hand and inserting a wood block or wedge of some kind to hold open while the linkage is cycled (linkage operated through its full movement ) to clear the choke cam. where are the main jets on this and idle jets? I've had the privilege of testing idle jets ranging from 45 to 65 with an on-board wide-band air/fuel monitor just for my own knowledge.
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