How to Balance & Tune Twin Weber DCOE Carburetors | Tech Tip 18
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- Опубліковано 4 січ 2020
- The Weber DCOE - Quite an intimidating setup if you're new to carburetors. Mixture Screws, Balance Screws, Idle Screws, it can all be a bit overwhelming if you're not familiar with these carbs. But fear not, I'm here to de-mystify some of the mystery, & hopefully give you the confidence to grab a screwdriver and have go. In this guide we'll look at how to dial in some baseline settings, then tune the carbs at idle.
This process should get you up and running regardless of engine or tune providing your jetting is in the right ball park. If you need help in that department, check out this article by Dave Andrews:
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Check out my latest video on how to tune the mechanical advance curve in a distributor: ua-cam.com/video/gkMLNRARGUE/v-deo.html
Mate, just bought an Alfa GTV 2000 with these carbs. This is my first car with carbs and your video is, and there’s no other word for it, perfect. Step by step, photos, and demo. Thanks you so much for posting. 🙏🏻
This makes my day ha. Cheers. Glad it helped you out, and welcome to carb life!
This is an excellent teaching video. I have tons of domestic carb experience and ZERO weber experience. You cant imagine how helpful this has been
THANK YOU
Best description of this process that I have come across. Thanks.
Cheers John
Thank you so much. You just saved me from pulling out the little hair I have left. I am so happy I found your video. Now off to purchase shorter trumpets because I can't get inside one that's too close to the strut tower. Thanks again
Great video thanks mate. Alot of people think carbs are difficult, but as you have shown, it's a process ans if you follow it step by step most people can do it.
It is just that. And the more you do it the easier it becomes. Cheers.
Completely agree, all I hear online is "I wouldn't do that unless you know what you're doing" how do you learn if you dont try it? 😂
Man, what great timing on this video, Im currently setting my twins on my 2.0 pinto. Props to you. Happy New Year😁
I got your back 😁
Happy New Year. Hope install goes smoothly.
What a great video-explaining in 15 minutes what took me a long time to figure out-thank you.
Thanks mark. Took me longer than 15 mins to figure it out too!
Man this is the best tuning video!! I’ve been messing with my Weber 40s for the last three days. Been doing it wrong this whole time until I seen this video I’m back on the road now! Thanx
No problem my good man. Thanks for the positive feedback 👍
I've been wanting a video like this for years. Good work and thank you!
Thanks Jeff
Thank you for this great crash course - highly informative and to the point!
Great to hear. Thankyou!
This is the best video about carburetor adjustment there is out there. Great job !!!
Many thanks!
I've swapped from a dual barrel holley on my 2.2 4 cylinder to dual DCOE 45's. I'm quite excited. Your video took a lot of mystery out of tuning these carbs. Thank you!
Thanks, glad to be of service. You can't beat twin webers 👍
Used this today setting up a brand new pair of 40dcoe on a x-flow, worked perfectly after 30mins of fettling, this video was really easy to follow
Great news Andrew. Thanks for the comment
Such a good video. Clear, methodical and so simple to follow. Thank you. 😊
Helped get my 85 Honda Prelude up and running great with your video. Thanks!!!
Great video! I've done this before but i didn't knew the process steps anymore. Thanks for this!
Tanks for the video, gave me the confidence to tune my single Webber in the Mgb.
Although my carb is slightly different to yours, I had your video playing as a guide while I was doing it. Thank you again from a newbie car enthusiast!
No problem Remy. Glad you found it helpful. Classic cars are a great starting point for enthusiasts. Much more user friendly!
This is exactly what I needed to see, thank you for doing this
No prob. Thanks 👍
Welcome back! Fantastic video! Your videos make my life much easier ;)
Thanks mate. Glad to hear it.
Brilliant video. I’m about to upgrade from 40’s to 45’s on my Pug. As they’re new 45’s I’ve been wondering about setting them up pre-start. I was over the moon to here you start with what to do if you have new carbs, no-one seems to cover that so I’m very thankful and will be visiting this video again when I come to do that. Thanks.
Thanks Skip glad you enjoyed the vid. Let me know how you get on with the 45s.
@@FastRust No worries, all dialled in I just have to get the rest finished and I;ll let you know.
Great video, barely touched carbs in my life, watched it and got then set up at idle in an hour. Its enough to get me to my MOT, till I can get them set up properly!
Great to hear it helped you get up and running! I would always recommend getting them set up properly on a rolling road. But once it's done you can keep them in good fettle using the tips in this vid.
Thankyou - a well presented and easy to follow procedure - the only one to be honest I have found, and I have been looking for ages. I am actually running Dellorto 45's but I believe the process is common to both. .
Ohhh man.... I have a bmw 2002 with Schrick 292 cam, 4 2 1 headers, electronic ignition, 5 speed... It's a blast... With 40 Webers.... I never have seen such a helping video like this.... Congratulations!!!!
thanks Ricardo! Nice car. Enjoy.
Man, thanks so much! I am just about to get my Jensen Healey with a Lotus 907 twincam up and running after nearly 12 years sitting. I opened the top of the Webers (it has two DCOE 45's) and found it didn't have a any jets. Lucky I found my old box of jets and tubes and chokes and a little cheat sheet for the setup. Hopefully things will go well! Thanks for the in depth process and I will be following it to the tee.
No problems Chris, if there's a Lotus Twin Cam getting fired up off the back of this video that's all the thanks I need! Lovely engine mate. Good luck with it 👍
Cheers for sharing this knowledge! I needed to see this as i am new to this type of carb and want to get it ready for the dyno. now i can! happy days.
Thanks Frans. Good luck!
Great content. Help me lots to set up my carbs
Very good explanation for the carb tuning! Thanks!
No prob. Thanks for the feedback.
What an excellent video ....very straight to the point !
Thanks Martin!
Thank You So Much!! This is an awesome video. Cheers brother from the USA!
Thanks mate. Glad you enjoyed it!
Thank you for this tutorial ! now i can tune my sierra's 45 dcoe carbs properly 😊
Awesome video, thank you very much! I've got the same setup with 45s and the same throttle linkage on my L18 in a 720 datsun. Definitely helped me a lot!
Do love a Datsun. Glad the video helped. Thanks!
Brilliant vid I'm looking forward to adjusting the carbs on my fisher fury 1600 fiat twin cam. Great instructions and makes it seem less daunting
Best video ever on this subject. Thank you sir. Will be easier to get my escort running better.
Thankyou! Appreciate the positive feedback 👍
Brilliant video! Worth noting for anyone wondering, 40s do not have the air bleed screws, just in case anyone is having a panic trying yo find them on their 40s
Thanks mate. Good tip. Wasn't aware of that!
Really helped me tune the webers on my EE80 Corolla. Cheers! 😁
No prob. Thanks!
Nice.
thy sound so good i love the sound of them better then a turbo
Agree! It never gets old.
A very good video on the various areas that make up getting a good tune.
One of the few videos I have seen that explains the importance of positioning the throttle plates to the first progression hole at idle. I would add that the plate edge should completely cover/block the first progression hole (as per the Weber Tuning Manual). Once this is done you should NOT have to touch the idle speed screw again, any further idle adjustments should be done via the idle mixture screws and / or changing the idle jet. Moving the idle speed screw such that the throttle plate moves forward or behind the first progression hole will either result in a hesitation on acceleration or issues with getting you idle mixture correct.
Thanks Andrew. Did not know the tip about the progression hole to baseline the idle - learn something new every day! Will try this technique next time. Cheers.
@@FastRust No problems, it is in an old Weber Tuning manual, page 42. As you have it set @4:32 mins you may experience a slight flat spot as soon as you start depressing the throttle as the mixture will lean out before the first progression hole comes on line.
exactly what I needed. i love you. thanks a lot. I am a beginner who bought a 68 Alfa GT and the car has been running very lean and down on power, on a 2000 km trip :D
Nice one. They are fussy carbs so constantly need a tweak to keep them running tip top, but once you know how it's dead easy
Thank you for your explain, i dont use this kind of carb, but the way you explain how to setting is great!
Thanks very much. Tried to make it as clear as possible.
@@FastRust crystal clear 😊🙏🏼
Just got an air meter and been meaning to set up my carbs for ages great video very clear and concise. Although mine are Dellorto DLHA's the principle should be the same.
Thanks Chris. Yep principle the same for the Dellortos just the location of stuff is slightly different. Good luck 👍🏻
You make it look so simple, thx m8
👍 no prob.
Thank you for clear and articulate information. Great sounding car. Bitchin ' burn out.
It took me over a year, perhaps a year and a half to get my DDDCO is properly set up for my hot TR six motor. Armed with a couple of the premier books on the subject and hundreds of dollars worth of Venturi‘s main jet, idle jets emulsion tubes pump springs and jets, etc. etc. I was able to get my Weber’s to perform like fuel injection! Best carburetor, hands-down for European sports cars
Excellent instructions. Once I have a new valve cover gasket I'll try to see if I can follow them.
Thanks. & good luck!
Excellent tutorial! Thanks
👍 glad you liked it.
Awesome job explaining.
Thankyou!
Outstanding video!
Thanks Bryce. I'll take that kind of feedback all day long!
Excellent video.
Great video! Your a star! Massive help!
Cheers Laurie 👍
Thanks for posting this card tune video done me a right favour. 🍰☕
Brilliant, i had teachers not explain it so well. Cheers
Thanks. Glad you enjoyed it!
Great video man, I’m going to be getting a Weber 32/36 carb for my Ford Capri 1.6 Laser 😃
Cheers. Great carb that. In a lot of ways I think it's better than the 38DGAS.
really useful video - Im off to give it a go on mine now.... thanks for sharing
Glad it helped. Good luck.
Cracking video! Helped out alot!!
Thanks! Great to hear
Great !! Great !! Video thx for taking your time giving us solid information about Weber carb set up ..💥👍🏻💥👍🏻
Thanks! Always good to hear that kind of feedback. Glad you enjoyed the video!
@@FastRust did you ever had fajs carburetor ? If yes what you think about this company .thx
Heard of them yes, but have never used them, or known any one that has - so it's probably unfair of me to comment. However, the old adage 'you get what you pay for' springs to mind!
@@FastRust thx :)
Brilliant. Great tutorial.
Thankyou!
Great info thanks
Keep the show going
Will do, cheers 👍
Great informative video, instant Sub!
Cheers mate, thankyou 👍🏻
Great video very informative
Thanks 👍
Great video. Very useful
👍 thanks!
Awesome video it worked out good for me. Thank you 🤙🏽
Good to hear. Thanks.
Good video. I use to start at 2 turns on the fuel mixture screw. But I have a slightly bigger cam. But the engine starts a little easier then.
Thanks! Yes fair point. 1.25 turns may be a little weak for some setups but I figured it was a good all round place to start from. Anywhere for there to 2 turns would probably be okay though.
The best vídeobregulation of mix carburator
Thanks Carlos
My daily drive is a 1976 316 e21 (M10B16 engine). At the moment the car runs pretty fine on its own original Solex carburettor, but time for a major engine overhaul is coming and I'm planning to bore and stroke it up to M10B20 specifications and add twin Weber DCOE 40. I think your video will be very helpful then! Thank you!!!!!
Cheers mate. Great carbs good luck with the new setup
Excellent, just saved me a heap of cash asking a tuner to help start up etc my 1965 Elan
Thanks mate. Nice car 👍
❤respect.
Very good lesson
Thank you, I will test on my Murena.
Nice mate, very well explained 👍
Just got mine back on and had a run out today.
Cheers mate. How's it running??
@@FastRust
Yeah good mate, bit of popping low revs still.
We should do a head to head at Ric Woods!
@@FastRust
Yeah man followed by drag race 😁
For slips?? 🤣
greetings from greece .. thanks for help.. finaly some idle and more balanced// soon will install a fuel regulator i bought and might jet em ( were in 2000 ascona ) .. twin 45s are a bit much for stock 1600cc but when gentle with pedal and some help from pneumatic twin phase distributor we have some chances!!! my setup is a 4ag stock bluetop with cast alluminium intake and ecu compeletely deleted!!! used medium stacks not long not short and 4/2/1 hand made headers !!!
Greetings! Welcome along. I've seen 45s on some pretty lairy 1600s up to now so you've every chance of it working. May have to play around with choke sizes a bit
great job!
Thanks Marco
Tqvm sir it's was so useful to me ❤
This is great, i have 40 dcoe on my BMW 2002. They sound really raspy and loud. Im going to try this out. Ty.
Just used to use a tube in the inlet side of the carb, and listen to to the airflow. Old school.
That is old school. I asked the old boy at the rolling road to teach me how to do it, he just said 'buy one of these' (air flow meter) 🙄
Great video, thank you.
Cheers Mark
It's easier to have a hand held tachometer for the mixture. Easier to see than hear on a hot engine. I also had color tune glass spark plugs, they made life way better and more accurate. Great video, reminds me of the old day's!
Cheers Barry. Yes multiple ways to skin a cat - this is just the way I've become used to doing it. Color Tune - I've heard mixed reviews about these things. Never tried myself but would like to purely out of curiosity!
@@FastRust Those days I really.miss, buggerizing about with carbies and ignition timing on my absolutely full house Mk1 Cortina. That's one little car I still dream about driving. Best thing I ever got for her was a close ratio gearbox form Malcom Stuart out of one of his rally Escorts
What an entertaining ride she was, fully dramatic
Hard cornering with one front wheel in the air and sliding, most satisfying. I could go on and on about that old car. I like your car very much and she sounds great. Long live the old one's eh! Best drives on the planet today!!!
Amen. Simple tech but there's nothing quite like driving a classic ford. I was at Blyton Park with a friend of mine in his 14 plate fiesta st. Halfway through the day I told him to make a few laps in the Capri - they were the most entertaining laps he made all day. Enough said! Cortina sounds excellent 👌
Thank you. So clear and without making a performance.
Cheers Neil!
Nice job.
Thanks.
Good vid. Many thanks.
Thanks mate. No prob.
Brilliant thanks
Good vid cheers mate.
Cheers 👍
good information great
thank you bro
Thanks !!!!!
Hey man great video! I have a question. I have three dcoe carberators. But on the 2nd to 4th cilinder the air doesnt change when we adjust the balance screw. Two years ago a specialist set them up, but now they need to be done again but we cant seem to change the air balance
Just bought a fuel pressure regulator to go in before I tune the carbs. Should I set this to what you recommended? I have a fiat 1600 twin cam engine in my sylva fury
Thank you! I didn't want to watch it it thru the whole thing but the problem is my brother was gonna sell his AE86 with 4AGE Silver Top with twin Weber 45 DCOE 13 and I don't want that xD it ain't my car but he always wanted one but wanting to sell it because he didn't know carbs. I'm just throwing in the towel and said, "Hey, I'll tune it" xD haha again, thank for the very informative video!
Thanks. This info should get you up and running. Good luck!
on my carb setup one of my mixture screws only seems to increase idle no matter how far out much further past when the other 3 would begin to choke the engine. i am assuming this must be a sign of an air leak. i have tried spraying carb clean on the shaft seal on that carb but no effect to engine speed. is there anything else i could try? does it matter? i have gotten then engine to idle smoothly and drive quite well by simply matching this screw to the others (i just recently ordered a color tune plug to help me see exactly what is going on but it hasnt arrived yet) should i investigate further? thanks
excellent !
Thanks 👍
Hi just like to say brilliant video, I have a question on the top of your carbs you have what looks like a linkage, I don't have this could you give me some details, or perhaps do a video about it cheers Craig McC
👍l love this video perfec now i cant start to calibreat.
Thanks Victor. Good luck 👍
I am going to tackle this project on a 1961 Mercedes tomorrow. I thought this was a solid video, and I found it pretty easy to follow along with. EXCEPT it would really help to use much zoomed in photos the first time you are talking about one screw or another or something. The tiny view in the bottom corner was not nearly clear enough to see what you were adjusting.
Cheers Kevin. Appreciate the feedback. I'll make sure I get some proper close ups in future videos of this nature. I probably need to invest in some newer cameras. Currently using a Go Pro Hero 2 and a Galaxy S6. What can I say. I like old stuff 🤣
Great video.what jetting are on your 45s
Thank you - what an excellent vid and clear explanation. I am about to tackle the same job on my '72 Alfa for the first time and this will be really helpful. I was considering using a Gunson Colourtune for the idle mixture adjustment. Do you rate that as a device?
Personally I have no experience with the Colortune but have heard mixed things. Some people love them, some think they're useless! Not much help to you I know, sorry. Thanks for the feedback, glad you liked the vid and good luck setting up your carbs.
Hi!
I have a TOYOTA Corolla with a 1.8 engine. I need tune in my 45 side draft carburetors. They sneeze when accelerating , on the exhaust side #3 it's hotter compare with the others.
What do you suggest to base line sett up ,then fine tunning.
Thank you
Quick question I see a lot of Picture's of Webber Carburetors where the Trumpets have no Filters fitted as is the case on this One,doesn't this allow dirt and dust enter the Carburetors?and cause blockages to the Jets.
I ve got 2 engine to tune. 2.0 and 205 bloc. Wich one is the Best for twin carb ? Carb size is the best ? DCOE44 ? 45 ? Sorry for my poor english. Thx :)
Both equally good - the 205 block will stand higher RPMs as rods are stronger, and can be potentially bored to a 2.1 as cylinder walls are thicker so has a slight edge on the earlier blocks. However, power gains are all in the head on Pintos so to get the most out of twin carbs you need a performance head, decent cam and exhaust 👍🏻
Thanks for this, great explanation
I would like to know if this tuning process will work on a twin 38 dgas setup on an Essex v6??
Thanks, and yes. The fundamentals are the same. Obviously the location of the screws etc. will be different & you may need an adaptor for the air flow meter.
Awesome video, really helpful...one question however, my twin carbs are reading really high at 10, any reason for this and how do I bring it down 5....Datsun 1200 A12 engine.
Cheers!
Don't worry about it. As long as idle is set correctly and they're balanced you're good
When installing twin carbs do you need to install a new intake?
Yes of course, you need the correct intake for the carbs and the engine
What is the hole for above the left most trumpet?