If the speed screw has to 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. Pulled out the idle jets today and they are 45's. They have excellent return customer service. wear. Weber 38DGAS Power valve | Opel GT Forum Drive the car. Enjoy banner ad-free browsing with Opel GT Forum Plus. 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. electric choke Jet You want to tune the engine by sound. to clear the choke cam. We only If this carb is considered. EXAMPLE With You must have JavaScript enabled in your browser to utilize the functionality of this website. I'm pretty sure your carb will be slightly different on some of the adjustments than this webpage says. While that seems to be a tragedy, we should look on the brightest side. carburetors are measured. The IDA carbs have no Air Bleed Hole but do have an F number to identify this feature. The Air Bleed for the IDA carb is in the Idle Jet holder and it is metered similar to the DCOE. 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. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. is Weber's premier Carburetor, and still the standard by which all other If you do not have enough advance you will have this problem and it will have nothing to do with the carb tuning. CHECK FOR VACUUM LEAKS ! Here we go.This is the real tricky part. It does not just control idle but the entire low speed running and part throttle transition. this point. Also check the speed screw and note how many total turns from initial contact. You cannot hang multiple carbs on any engine without an increase in spark output and even hope to burn the extra fuel being delivered. Buyer pays return shipping. Weber 38DGAS help! | The H.A.M.B. - The Jalopy Journal 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? You cannot hang multiple carbs on any engine without an increase in spark output and even hope to burn the extra fuel being delivered. by screwing in the mixture screw and count the number of turns it takes to But might be something else. The more you open it the more mixed fuel and air enters the engine. The build is a 7120 4.0 head, block bored .040 over, comp cams 235 extreme 4x4 cam, HEI distributor, running 4psi to the carb when in doubt hit the . Recheck timing and vacuum hook ups. 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. My air corrector jets are 170' I pulled my main jets out were 45's. titled it to help others in the future searching for this material.. Q: does it have an idle adjustment screw? Set the Idle Speed Screw by backing out the Idle Speed Screw until it is not in contact with the throttle stop lever. As long as the engine stays running idle speed is not condition usually requiring greater change. IMPORTANT TECHNICAL ARTICLE.Jetting and Tuning Weber Carbs. linkage nut, causing a binding in linkage assembly. Step-6: OkayNow that you have everything else sorted out ( Right ? Do not mess with them. its compact size, it is capable of high rates of flow. Classifieds - Engine/Transmission/Transfer Case, BJ42 | FJ43 | BJ44 | FJ45 | FJ45LV | HJ47, North American Clubhouses - Central Region, CA.AB- Rocky Mountain Land Cruiser Association, CO/WY- Horsetooth 4 Wheelers Cruiser Club, TX- Lone Star Land Cruisers - Austin Chapter, TX- The White Trash of the Elwood Chapter, CA.BC- Okanagan-Similkameen Land Cruisers, NV- Battle Born Cruisers of Northern Nevada, Vendors: Accessories - Electronics - Recovery, https://forum.ih8mud.com/40-55-series-tech/213147-weber-carb-adjustment-thread.html, The almost one week resto, JohnnyC's Quickto Resto. understand the need to keep throttle plate as near to closed as possible I have been trawling this forum for guidance on how to get my 2F engine with a weber 38 DGAS to run correctly. Youll probably save $$ if you shop around. /viewtopic.php?f=1&t=73925&p=574647#p574647, http://www.redlineweber.com/html/Tech/3 unning.htm. AC on. 1; 2 . Any . The idle speed screw will be sensitive and should only take 14 turn to achieve the idle speed you like. (Other uses include forklifts , snowmobiles and generators) This is a high performance alternative to most any DGV applications. Thank you so much. engines needs. 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.) by Johann65 Wed 02 Nov 2016, 15:34, Post Do not depend on the existing settings. mine originally had 45's in it and would idle horribly and have lots of black smoke. Could be wrong.. but figured id try. PDF WEBER CARBURETOR TROUBLESHOOTING GUIDE - Revoracing Also seems to be running a little rich. (Made in Spain), The ICT and ICH Series 1 barrel downdraft carburetor. You likely have the wrong emulsion tubes. Log In | My Account/Reorder. SET UP AND LEAN BEST IDLE ADJUSTMENT. Reducing the main jet and main air corrector will lean the entry point a bit but should maintain the overall air / fuel ratio. by Rossouw Tue 01 Nov 2016, 17:43, Post Tuning the Weber takes a bit of time, but the fact that the Weber has a lot of adjustments makes it very tunable to your specific application. and smoothest running point. 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. will typically start at 1-1.5 Turns out. SPECIALSBMW 2002 and E21 Rear Brace and Battery Relocation kits are on specialClick Here for E21 Click Here for 2002ITEMS BACK IN STOCKBMW M54 ARP Head Studs are Back In Stock..Click HereMitsubishi 2.6 ARP Head studs are Back In StockClick HereELECTROMOTIVE Crank Sensors1/2" Mag IN STOCK 3/8" Mag 1/2" Hall Effect in 3-4 weeksClick Here. 38 DGAS? Forgot all about that, but it was probably the first thing I did after install and easy to do. until it lightly seats. Step-5: Make sure that your Fuel Delivery is right.Once again, you cannot tune carbs that do not have adequate or proper fuel delivery. If your car is still not running properly or you feel that you should have more power (Be realistic about that. NEW Weber 3 Barrels are cast and machined using 100% new tooling made from You cannot make jet decisions unless you kow what you are starting with Make Sure your Ignition system is working properly. and 2 1/4 to 3 turns out for late style DCOES (151 and 152 with air bleed screws under the white caps.). Also seems to be running a little rich. This is not an Air Screw. 5 months later they refunded my money no problem. Start set up by confirming carb base line settings. By having 2 mixture screws you are delivering fuel from 2 places in the intake manifold. (You will hear a metallic click as the choke cam is released. When cold less than that. The IDF features diaphragm type Interchangeable Recheck timing and vacuum hook ups. 1980 cj5 401, t-176, p/s., YJ p/b, tfi/hei hybrid, 3.73 30/44. can check the choke fast Idle screw under the choke assembly to confirm that it is not in contact with the choke fast idle cam.). actuation. If you know you have the idle circuit right then the primary main jet is too small. If Idle Mixture screws are with in They are supposed to be shipped with 55's and I'm running 50's in mine. For a better experience, please enable JavaScript in your browser before proceeding. If you know you have the idle circuit right then the primary main jet is too small. Lightening the foot on the gas usually puts the O2 meter at anywhere from 10.7-12.5, which is obviously quite rich. Your final setting should be under 3/4 turn This can cause part throttle dirveability issues. Opening the screws more should make it a bit richer but it should still idle. Shipping Policy. Carbs, Conversions, Jets, Parts, Tools and Rebuilding Services, (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). Idle jet. 32/36: f7 emulsion tubes, 140 to 145 primary jets, 185 air correctors, 50 accel. The 38/38 is a synchronous carb, both barrels open at the same time. 289/302, 351, 429/460, Etc. Actually remove the jets and chokes and check the sizes and WRITE THEM DOWN. Even with it running rich it was an big improvement over the 32/36 that was jetted as good as I could get it. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. It is important to verify all linkage and levers are Your final setting should be under 3/4 turn The 50 refers to the .5mm fuel hole and the F8 Refers to the Air Bleed hole in the side. capabilities, compact alloy body and wide variety of available sizes, the Seeking opinions - Air fuel ratios with 32/36 Weber DGV carbs Quality If you have a single carb you can skip this stepIf you have multiple carbs then the 1st thing you need to do is make sure the carbs are. EagleServer WebSite Design 2023, Greater (Made in Spain), Genuine Weber Carburetors If you have a flat spot or hesitation when you first take off then it is likely that the idle circuit is too lean. When the Weber 38/38 Jetting | BMW E9 Coupe Discussion Forum I had a similar situation on a weber a few years back. 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. I'm not so sure with my setup I NEED a 38DGAS.. but for $165 it was worth it to see if this 38DGAS clone was worth it or not. You want to tune the engine by sound. Actually, I believe it is a copy of a Weber 38 DGAS carb. and, of course, the excellence that is Weber. My new jets just came in, but I don't have time to mess with 'em. 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. Genuine Original Weber Carburetors if your not sure) showing signs of richness or flooding it is really a lean condition. If it's redish in color you are running too rich. Heads, Normally Aspirated Std BBC Open Chamber Dome, SBC 350 - Flat Top, 2.020/1.600 valve milled head, SBC 350 Flat top X Style Forgings - 2.020/ 1.600 valve Milled Head, SBC 350 Flat top X Style Forgings - Heavy Duty, SBC 360 Sprint X Style Forgings - Dome, Brodix ASCS Head, Super Series Piston - BBC Dome 540, 555 & 565 Open Chamber, Blown Alcohol Chrysler 4.375 Hemi (Drag Race), Blown Alcohol Chrysler 4.467 Hemi (Drag Race), Duratec 2.0L Non variable valve timing (no valve reliefs), SBF Windsler N head LIGHT WT. Pump jet-55. 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. Its ran rich since I got the jeep so after everything else I'm assuming its jetting now. (Made in Spain), With a Grand Prix Racing heritage, the venerable DCOE See more about the 32/36 or 38 choice. To me that means you're probably going to have to tweak jets and probably idle air corrector jets to get your stumble smoothed out. . BACK IN STOCK AGAIN ! Weber 38 DGAS : info + settings + tuning | Page 4 - IH8MUD Forum Historically I have run as much as 18 degrees with the HEI setup and it ran fine. If the speed screw has to be opened1/2 or more turns then this is also an indication of a lean condition usually requiring greater change. installed without binding and the linkage opens to full throttle and This will give you a good reading of fuel mixture and enable you to make a good judgement of what you need to do. Do not go up or down more than 1 step at a time when tuning the idle circuit. The F8 is Leaner (Has a larger Air hole) than the F9Soooooo. Ideally you want the ceramic part of the plug a nice Dark Tan to medium Brown color with a . OkayNow that you have everything else sorted out ( Right ? Q: does it have an idle adjustment screw? 38 DGAS Tunning - REDLINE Weber 38/38 DGS tuning help | FordSix Performance Forum Opel GT Source may need to talk to their distributor about pricing. 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. Set the Idle Speed Screw by backing out the Idle To confirm settings with the engine running. Poor running does not always mean a bad or poorly adjusted carburetor. Thanks for the info. In before the mixture screws? See our Fuel pump Tech Page for this information. A lack of spark or weak spark will make it impossible to tune the carbs properly or to their maximum potential. 4. JavaScript is disabled. Weber 38DGAS Tuning - LC Engineering See our Ignition tech page for more details. All the jets overlap to some degree in that zone, but it depends on where "partial throttle" really is when you get the stumble. Just have some patience and spend a lot of time with it, and read that article! AN ADVANTAGE OF THE WEBER CARBURETOR IS ITS Adjust to best, fastest and smoothest running point. Set the Idle SPEED to approx 900-1000 RPM..Make sure multiple carbs are synchronizedTurn the mixture screws in until the idle starts to stumble and get roughOn a sidedraft with 2 screws do them each a little at a time.Then back them out until the best idle quality is acheived. 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 38/38 DGES : These carbs have fixed venturis so the choke size is not an issue. Note: This feature currently requires accessing the site using the built-in Safari browser. Use your ear, not a scope or tuning instruments at this point. Throttle response is great, and responds well whenever I want to open it up. may want to recalibrate the Idle circuit (low speed circuit) to your diaphragm type accelerator pump circuits, separate starting circuits and An advantage of a Weber carburetor is its ease of adjustment and tuning. Maybe someone can still remember the settings for a Weber 38 DGAS on a Ford Cortina 3l V6 Bakkie (1984)! BMW Front Strut Tower Bars and Rear Battery relocation kit Packages, BMW Rear Shock Braces and Battery Relocation Kits Only, Datsun Z Strut Tower BracesNOT AVAILABLE AT THIS TIME.ETA is FALL 2020, Everything for Weber Carbs. Mixture screws should be as close to one turn out as you can get. turns out turns then the Idle jet is too lean (too small). It's easily (Don't be fooled by Cheap Copy's Call A 4 cylinder 2.0 with a 32/36 is only going to make about 120-125 HP max so don't expect miracles.) 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. Specific Information on Mixture Screw Setting for: Very Simply..The bigger the number the richer the jet. Was going to order one but just wanted to be sure. Also using a 123 dist and can share the curve if needed. That said it will be nice to have some solid jetting numbers when I get to that. Assuming you have no vacuum leaks this is a very simple process. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. It is fast and accurate and will take alot of the guesswork out of it. The problem is my idle vacuum is about 8-9 at 1,100rpm when warmed up. There is no F Number to deal with. This is a very simple operationThe car should idle well and small adjustments leaner (Turning them in) should make the idle drop off. causes the visible rich condition, and confirms the need to increase the You did do all that other boring stuff didn't you ? ) bottom out and note if the engine dies. 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. performance . (They should be Stamped Made in Spain) This is because the plenum type manifold that they are on distributes fuel unevenly. Weber Carburetor 38 outlaw jet pack jet kit - amazon.com NOTE: On the latest modern Spanish Weber 40 DCOE 151 and 45 DCOE 152 START with the Idle Mixture Screws at. These assumptions are based on the fact that the speed screw setting is not opened more than 1/2 turn in. This kit is used to make the air/fuel mixture richer. It is always difficult to advise this sort of thing from an armchair.. but usually the Weber38 dont have too many problems (did I just hear a chorus of "WHAT??" screw to lean best idle again. Bolt pattern It's an 81 CJ7 258 with 4.0 head, HEI, and Weber 38 DGES. This means you need to have adequate spark to burn the extra fuel or you will have problems tuning and jetting your carbs. A 50 Idle jet is a .5mm fuel hole. Step-3: Know what is in your carb NOW. will be sensitive and should only take turn to achieve the idle speed i was doing a little test drive today, up to a certain RPM. The Fora platform includes forum software by XenForo. Front and Rear Strut Bars and Rear Shock Braces with Battery Relocation Kits. This is what (Checking for linkage bind) Now bring screw back into contact with the lever and continue to open or screwing in, no more than 1/2 turn in, maximum. i thought if you were running rich you wanted to get larger idle jets? jet size. Well mainly because I was under the impression they were over $350 :sigh: Supplier does have a 30 day money back policy. A DGV, DFV, DGES mix the air internally in the carb and do not have these air bleed holes in the idle jet. A good place to start for most cars with Webers on pump gas is 12-14 Degrees advance at 1000 RPM idle and 36 Degrees total advance by 3000 RPMThis is not cast in stone and you need to make sure your car does not Detonate at these setting. use factory Weber equipment to ensure each carburetor is working 2. warmed up so that the choke is fully opened and disengaged. If the settings are other than described then you may want to recalibrate the Idle circuit (low speed circuit) to your engines needs. echoing outside? Also I've seen jet kits online on ebay for these for around 55.00.
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