I am a German certified master mechanic with decades of experience with carbs (sorry for tooting my own horn...) but I enjoyed every bit of that series of videos. Thank you so much!
Today, I learned so much and I can't say Thank You enough. You really pulled it all together very nicely and the mystery is gone. Take Care and be well. Dave, Niagara Falls.
These videos have been so helpful to me. Thank you for making them and so detailed. I have a 1960 mercedes 190sl with these carbs. cleaned all the jets, bowls etc and the car is running so good now!
Hi Steve, fantastic well informed videos, you have lots of skills up in that head...if i was Mr Weber I'd be offering you a proper super sponsored channel. I'm mid 40s now and have an rs2000 with the weber idf44s i got them bang on once balanced and synchronized. Was probably pot look. I have a few different set ups and you've inspired me to dig them out and see how they run. One little tip if it helps? you might of heard of it...lip barm on gaskets...its an old hotroder trick i believe to swap bits all the time quickly. 👍
I truly enjoy watching your videos; you explain things so clear and effective that the new person without the background can understand and not get overwhelmed. Thank you so much for taking your valuable time showing us your technique so we can keep our classic cars on the road. Have a great day. Regards, Jay
Never had a Weber carburetor and I never will, but I really appreciated how much I learned. Not enough to do anything useful, but enough to appreciate how complex and beautifully designed they are. Thank you!
These videos by Steve are probably the best instructive ones I have watched. I am rebuilding 105 Alfa Romeo engines and have had difficulty in understanding and getting the jetting and settings right. Well done and thank you. You are a great teacher
I just installed set of 40 DCOE's on my BMW 2002 and am re-jetting the carbs and your video has helped me immensely along with other weber manuals on the internet. You explain everything is such a well manner and I love your diagrams, it's amazing. Thank you!
I found your videos to be a great source of info. I am a retired motorcycle and auto tech. I have a Willys (Ford) M38 Jeep with a turned Volvo B20 engine. The Jeep came with the Webers in a box but being familiar with the stock SU carbs I went with them. The other day feeling a bit bored I pulled the Webers out of the box and started the cleaning and refurbishing process. Once I took the float chamber off I realized I needed more information so I would not ruin anything. This series of videos and the detailed explanations of each circuit are well thought out and very informative. Thank you for doing this.
This has been an awesome series! Thank you for posting this! Also, the same 5 people are giving a thumbs down. Losers. Love the white board. This information is like going to school and learning! Awesome stuff, Steve!
Thankyou for you knowledgeable video. I race in Formula Libre with a formula Vee with twin side draft webers dc40. We are about 2sec. Off the pace of the nationals formula Vee SA. I have learnt a few things from you .Thankyou Cyril
I just did a rebuild on my 40 dcoe, while watching your video's. Thanks for these very comprehensive video's! Today was the first time for me to even open up a carburettor! Felt like being back at school again!
@@D3Sshooter Well, I still need to refurbish carburettor number 2. 😂 And the intake manifold is at the machine shop for re-treading. Hope to get the car back on track this summer.
This is incredible. Trying to read up on DCOE's in anticipation of swapping my Datsun 1200 over to twins at some point. Absolutely amazing video - the best I've seen thus far. Can't thank you enough for documenting this in such great detail, and the illustrations were immensely helpful in conveying the information. Cheers from British Columbia, Canada.
Just wanted to say your DCOE videos are awesome! I am just preparing a weber for my Giulia and i think your pace, look on details and focus on subjects are perfect! Thanks!
Hello, I'm zitta from Japan. Your logical explanation is great useful for my work. I'm now rebuilding Catermam Seven which equip Weber DCOE. It's my first experience to rebuilt Weber DCOE at this time but thanks to your video I could complete the work without any trouble. I'll keep on watching your video!!!
I used to have little knowledge of DCOE's and was unsure how to set them up properly. I've seen this video 3 times and others of yours, over a 4 month period and now I'm able to jet and tune them with success. I solved my hanging high idle problem when hot, by loosening the triple carbs spindle nuts. Some were horribly tight and I replaced the old and weak internal return springs. That stopped the 1,800 rpm idle hang that couldn't be stopped with a throttle blip or stronger external springs. I also measured the float levels and all were at 4mm not 8.5mm.. That caused a rich idle that wasn't improved by leaner idle jets or mixture adjusting. Now that the float levels are down where they belong, the idle mixture screws allow me to achieve 13.5 to 1 AFR. That float level change then required me to richen the idle jets to eliminate the bog in progression to the main jets. I now have 900 rpm idle that is smooth and it revs quickly and there's no bogging. Thank you for all of your white board discussions which are far more valuable than just words and for sharing your experience.
This is the best video i have ever seen about carburator. You are fantastic A lot of work on the carburator and so on the video. A very good work ! Hello and thank tou very much from France.
Wow! What a great video. I have always loved the look of weber carbs on performance engines but never had one. I have always heard people say that they don't work well, and now I know why. It's because they don't know how to tune them!! They are like the "swiss watch" of carburetors. Great video! Now I have to go watch the others!
Thank you so much for the series! I have a Weber 32 DFT, that drips some fuel in idle from the auxiliary venturi in the second barrel. Some "mechanics" have messed it up completely, so l'll try to readjust the float and the butterfly idle position to try and bring it in order.
The drawings help a lot. Nothing boring at all. I just completed my base tune which made it richer and the pinging was still there. After your description on fuel delivery, I bought a new fuel pump. It went from 33L/hr to 53L/hr and the pinging has stopped. 👍👍👍 and drive's pretty good.
I gave up on my weber, I jetted it 7 ways to Sunday. Nothing would clean up the rich exhaust smell. Just finished Installing a Holley super sniper EFI, Wow!!!! What a difference
Hi Steve, great video! Due to your video I learned a lot, thank you!!! I bought a set DCOE 40's from a guy that used them on a Nissan Sunny 1300. I am planning to put them in a DAF 66 with 1400cc engine from Volvo 340 and Renault 5 Alpine cilinder head. I will use the DAF for fast road and nice weather sunday drives. The DCOE's now have the following base setup; 32mm main venturi's, 4.5 secundary venturi's. My main jets are 1.35, F34 emulsion tubes, 2.10 air reduction jets. The idle jets are 55F17's. Injection jets 35's, bleed/return valve 60 and 150 needle valve. So I think the base setup is quite off. Will search for the right parts for a proper base setup. Again, thanks a lot and keep up the great video’s! Vriendelijke groet uit Nederland:)
Thanks for the comments, and happy to see that it helped you out... that is an interesting mix DAF66 with a Volvo engine and a R5A head . yes that seems to be a bit off
Hello Steve Very interesting, soon 2C is good and I can't wait to see this carburetor work. Nice to listen to your explanations over a good cup of coffee! Thank you
Thank you Steve!!! You are doing a great job! I am running a Mazda MX5 1.6 with 45dcoe Italian webers and really enjoying your videos. I have already made a tuning change to mine and it's improved them greatly! One thing I did do was install a wideband o2 sensor and gauge as I have no access to a dyno. I recommend this a tuning tool. You can monitor the air/fuel ratio on the run. Thanks again for you videos. Cheers from Australia.
Sounds great John, and indeed a wideband O2 sensor and analyser is a great tool to have. Especially if it an log all your data ( ECU and NOX) while taking that test ride. a 45 , wow that is large for a 1600... , but maybe you have a smaller venturi ? What is your prime venturi ?
@@D3Sshooter hi steve, and thanks for the reply, yes I figured they are a large carb for the size engine. I bought them second hand sight un seen from a guy who assured me they were properly set up for his 1.6 mx5. Turns out they were a very base set up and I'm lucky enough to be doing the fine tuning. The main chokes are 32mm.
Thank you for this video and all the videos you have shared with the public. They are informative, educational, and very professionally done both in content and presentation.
Thank you D3Shooter ! You opened a new world of knowledge for me right now, and I am sure, many if not all, who are here, got many questions (that were retriggered even in food related issues by the word "carb"), clearly answered. Would you consider becoming my uncle ? Hahahaha xD All the very best, and a big thank you again !
Again a very interesting explanation. Well structured and ... loud and clear! I understand now why our Alfa GTA was not tuned very well the time that we raced that car in Zolder. We were much younger then, and the word "Internet" had to be invented, so ... D3Sshooter was not available that time! By the way: you are able to write left and right handed! :-) Wow!
Haha Jan , indeed we were much younger and information was hard to get. Webers were like black magic and only few had the know how... Zolder, I have been there for some track days... Are still in the race arena ?
Beste Stephane, of Steve, ergens heb ik het gevoel dat we mekaar ooit al eens het pad gekruist hebben. Echt racen doe ik niet meer, maar ik heb nog altijd mijn R1 full in de garage staan. Met helm op zie je mijn grijze haren niet, en bij een initiatie met de Motorschool in Zolder ben ik de eerste bocht naar links volledig met mijn vingertoppen over de grond gereden! Dat zijn "Big Bang"-emoties hoor! Ik heb een mail-adres waar ik je kan bereiken. Geef op dit bericht een duim, en ik passeer je dan wat meer info over mezelf, over Zolder, en nog andere dingen! Blijf aub intussen verder doen met jouw instructie-video's. Ik hou bijna meer van jouw manier van lesgeven, dan de les zelf! :-)
This really inspires me to want to build a set of 40s for my B6ZE Miata. Having that old british sports car style with a set up suspension would be so much fun. If only it used a distributor and not a cam angle sensor...more math. Thanks for the incredible video!
This has been a great series Steve, for the experienced and novice alike. Really well explained in detail that's simple f or your viewers to absorb. Well done. PS on a 2 ltr pinto unit we would by choice use 45s for a pinto in a mid state of tune going up to 48scand 50s for full house units.
Awesome, thank you! Indeed 45's. In my case it was already fitted with the 40 a bit on the low side/ but with the richer main jets it might just work// will see how it will do on the road test. But first the distribution belt change, clutch and electronic ignition changes
I’m amazed at your knowledge and the ability to share it on these carbs! Thank you for the videos. I’m working with one on a twin 650 and not many people know anything about them in the states.
Gotta say I’m jealous of your knowledge. All this stuff is becoming a lost art and trying to do this now with only the internet as a resource is shooting in the dark with a little bit of light. To many ppl without the right info acting like they know it like you do. Thank you for doing this video series!!! I just wish more people did in depth videos like you rather than the crappy useless videos out there. Thank you again, and if you’ve got a website I’d love to touch base with you about doing a blow through triple 45dcoe.
Thank you for the great and very detailed video. We hope to use a Weber carb on a SAAB V4 engine (Ford Cologn) In our 1973 Model 96. Excellent and well done!
@@D3Sshooter Really dont know. First I need to locate a suitable intake manifold for the V4 that will accept a Weber two barrel. Engine doesnt make very much horsepower and we are hoping to make the car a bit quicker
That graph works for me. Mine is a 1.3 4 cylinder engine which produces max power at 6800 rpm and has a main venturi size of 32mm on twin 40 Solex ADDHE's
Evening Steve. Hope your all keep safe and well? Love the wipe board drawing as it makes so much sense 👍🏻 How on earth did they design those carbs to work in the first place lol 😂 Covid-19 maybe a pain in the derrière but sat on the settee watching the master with a brew is just perfect 👍🏻 The verity of content of your channel is absolutely fantastic. So a big thank you Steve for putting the time and effort making these super videos. Take care until the next time cheers Stevie 😎🇬🇧
Hi stevie, I happy that you enjoyed it. The whiteboard has always been my pet tool. In the office, when we design new concepts I always use a large whiteboard.. Much better then Power point slides. That is something for managers not for engineers. Its my pleasure and the thank you's are actually for you as you are watching and commenting. Txs again
Great video man, super useful! I am now in process of restoring a car and picked up a repalcement engine yesterday and my wish was to go dual webers but was unsure about it since I don't know about carbs but this is very very helpful! Steve, this is awesome! Please keep up :)
Something off with that graph. If using 40 dcoe, 34mm is absolutely the largest usable venturi. A 2Ltr Pinto revving to 6k rpm will be a standard engine with carbs fitted. 32mm chokes will be more than enough for that engine. If 36mm items are required, 45mm carburettors will be needed.
I have been comming bact to this series of videos many times working on my Weber fuled Alfa in the past 2 years. Now I am wondering, have you changed your setup after driving your car? What jets have you changed and why? Its always great to learn from you :)
Fantástic vídeo sir....the best i have ever seen.... Im having a strugle with my BMW 2002...after 3000 it just flyes..... But before... If i go wot in low rpm..before 3000...its not very good... I cant understand if its the idle or the main jet because if i go on 80%on the aceleretor on low rpm... Its good... But at full throtle..it blogs a bit... Specialy on the transition from idle to main. I have 32chokes 130 main 180airs 55f9 idles F9 emulsion tubes. Its almost perfect..... But i canot solve this litle issue... I have learn a lot about carburetors.... But you sir...are the best!
@@D3Sshooter thanks for you answer, i had f11 emulsion but it feels better with f9... More responsive..... It only hapens in very low rpm... We ear that vroaaawww that makes with Open throtle but maybe because its only 2000 rpm Thats too much gas in such low rpm... The car GOES.... But i feel that with a bit less acelerator on low rpm the car picks up Faster..... Thanks
By far best detailed video about Weber DCOEs. If someone could help me in selecting jets and Venturi sizes? Have a 1970 Bmw 2002, slightly modified 2000cc with 284 camshaft and ti head and pistons. 40 DCOE Weber’s with Around 135bhp peak power around 5600rpm, redline at 7000max. Having trouble starting and often dies at idle. The manual gives the following examples: Jetting for standard 2000/1800/1600 Pinto on 40s 34mm Chokes 135 main jets F11 emulsions 190 air correctors 35 pump jets 40/f9 idle jets,45/f9 for 1800/2000 4.5 aux vents Jetting for modified 1600 Pinto on 40s 34mm chokes 140 main jets F16 emulsions 190 air correctors 40 pump jets 40/f9 idle jets 4.5 aux vents What in your opinion would be the ideal setup for my configuration? Wish they had a modified 2000cc with 40 DCOEs in the list of examples. Thanks guys
Awesome series on the DCOE, can't wait for the tuning video. I wonder if I could bend your ear for a minute: I have a Lotus 907 (dual overhead cam 16v engine) with a high compression (9.5 to 1). Dual 45 DCOE's, running a 38mm main and a 4.5 aux. I have been attempting to tune it for many years, and recently got some help and installed a wideband A/F gauge. The setup the engine seems to like is bizarre: a 120 main jet, 170 air corrector, F4 emulsion, 55 pump jets, 55F9 idle jets, and a 40 pump exhaust. 8mm float height, gets a solid 3 psi of pressure. She runs at around 13 to 1 at idle, about 12 to 1 at cruising, good progression. Pops a bit on decel, and the gauge reads around 16 to 1 on decel. Good power. It always struck me as strange that it likes such a small main jet- or is there something I am missing? Should I go to a smaller idle jet and pump jet to see if this will allow for a larger main? According to the math, it should require a 140. The engine has a big cam and is optimized for high RPM's, with a redline at 8000.
TXS for the comments, have you checked the float level, as that will have a major influence on the emulsion tube. You mentioned the AFR, that seems to run lean. I wonder under which state that was Idle, progression, WO, cruising. That is important to know as Weber has multiple channels for each of those states. Are you sure the float level is maintained at WO. Popping in the exhaust or inlet...?
@@D3Sshooter I recently checked my float levels, these are Spanish webers with the plastic floats so it was at 12.5mm. I have an in car fuel pressure gauge and it is always steady at 3 psi. You mentioned the AFR being lean? What should the AFR be at idle, cruise, and WOT? I recently changed the pump jets from a 55 down to a 35 and it seems to have made a difference. My readings are: 13.5 to 1 at idle, 12 to 1 cruising partial throttle, and around 10-11 to 1 during WOT. On deceleration, it can dip to as low as 16-17 to 1. What is a good closed throttle ratio?
@@D3Sshooter I'm actually in the midst of tuning my 1974 BMW 2002ti with DCOE40's, so watching this as a bit of a Theory refresher was great! I can't wait till you get into the 'tuning' aspect. Right now I'm chasing how to get from a very ideal progression, over a lean-gap into the mains, and it's proving rather frustrating without adopting an overly rich idle jet.... I'm now at the point where I'm playing with float height to hopefully help close that gap, being unable to source any size Aux's than the 4.5's I have my hands on.... gone down from 8mm, to 7.5, and tomorrow, I'll try 7 flat....
This is another amazing tutorial of yours! I admire you and all your work you do. Thank you very much for sharing. I just have one thought - since you have golden hands to restore or build stuff, so I thought that maybe you can build an air tunnel, attach it to this carburetor and simulate the mixture flow like it would be produced when carburetor is mounted to engine? Of course it should mimic the stream generated by engine at certain RPMs. This would perfectly illustrate carburetor operation and real time behavior to butterfly opening or any adjustments. Well, it's just a thought though :)
