How to Balance & Tune Twin Weber DCOE Carburetors | Tech Tip 18

[@FastRust]

Check out my latest video on how to tune the mechanical advance curve in a distributor: kzbin.info/www/bejne/nZywfYGIdrd6i6c

[@spdrcrj]

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. 🙏🏻

[@FastRust]

This makes my day ha. Cheers. Glad it helped you out, and welcome to carb life!

[@boldbeliever52]

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

[@sarahderosier101]

You legitimately saved me HOURS today, AND my car is running better than she has in a LONG time. Thank you so much!!

[@Baggerdaddy702]

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

[@FastRust]

No problem my good man. Thanks for the positive feedback 👍

[@autoaddict7481]

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.

[@FastRust]

It is just that. And the more you do it the easier it becomes. Cheers.

[@TheCornishGingerOfficial]

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? 😂

[@skipsrallycar]

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.

[@FastRust]

Thanks Skip glad you enjoyed the vid. Let me know how you get on with the 45s.

[@skipsrallycar]

@@FastRust No worries, all dialled in I just have to get the rest finished and I;ll let you know.

[@ricardorodrigues1003]

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!!!!

[@FastRust]

thanks Ricardo! Nice car. Enjoy.

[@andrewcordery6157]

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

[@FastRust]

Great news Andrew. Thanks for the comment

[@andrewb3497]

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.

[@FastRust]

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.

[@andrewb3497]

@@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.

[@patrickmcbrearty2621]

Man, what great timing on this video, Im currently setting my twins on my 2.0 pinto. Props to you. Happy New Year😁

[@FastRust]

I got your back 😁 Happy New Year. Hope install goes smoothly.

[@novalutiongsi1435]

Wish I had found this video before I attempted to get my Nova started. It runs... but it so needs all putting back base settings and starting again. Thanks for the video. 👍

[@martinrodgers6114]

Best description of this process that I have come across. Thanks.

[@FastRust]

Cheers John

[@leonardmerci2070]

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

[@jordanpene5279]

Thanks so much, I just bought a Lotus 7 Replica with twin weber 45 DCOE and have been looking to educate myself on these.

[@joshfoley8862]

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!

[@FastRust]

Thanks, glad to be of service. You can't beat twin webers 👍

[@chrishull9983]

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. .

[@blakeperkins8717]

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

[@FastRust]

Thanks mate. Good tip. Wasn't aware of that!

[@Tankflipper]

Great video, thank you. Good luck cutting that hedge behind you!

[@remydubois6437]

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!

[@FastRust]

No problem Remy. Glad you found it helpful. Classic cars are a great starting point for enthusiasts. Much more user friendly!

[@markwhitaker3673]

What a great video-explaining in 15 minutes what took me a long time to figure out-thank you.

[@FastRust]

Thanks mark. Took me longer than 15 mins to figure it out too!

[@johnblackmore4772]

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

[@discogodfather22]

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.

[@FastRust]

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 👍

[@Boele390]

Great video! I've done this before but i didn't knew the process steps anymore. Thanks for this!

[@steveirving2449]

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!

[@FastRust]

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.

[@694069406940]

thy sound so good i love the sound of them better then a turbo

[@FastRust]

Agree! It never gets old.

[@charliegrech5598]

Such a good video. Clear, methodical and so simple to follow. Thank you. 😊

[@jeffbergen7356]

I've been wanting a video like this for years. Good work and thank you!

[@FastRust]

Thanks Jeff

[@michaelwhiting550]

Helped get my 85 Honda Prelude up and running great with your video. Thanks!!!

[@FKGZ19]

This is the best video about carburetor adjustment there is out there. Great job !!!

[@FastRust]

Many thanks!

[@peterpowder8546]

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

[@barrysargent1213]

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!

[@FastRust]

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!

[@barrysargent1213]

@@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!!!

[@FastRust]

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 👌

[@jfaz]

Thank you for this great crash course - highly informative and to the point!

[@FastRust]

Great to hear. Thankyou!

[@mellilore]

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!!!!!

[@FastRust]

Cheers mate. Great carbs good luck with the new setup

[@prigo9119]

Great, straight Forward explanation. Will find out if I‘m ready now for my First tune on a triple carb Datsun 🥴😇

[@laurentiuprisacariu9905]

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

[@FastRust]

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

[@NeiroAtOpelCC]

Excellent instructions. Once I have a new valve cover gasket I'll try to see if I can follow them.

[@FastRust]

Thanks. & good luck!

[@johnevans7389]

Just used to use a tube in the inlet side of the carb, and listen to to the airflow. Old school.

[@FastRust]

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) 🙄

[@panospapadimitriou3498]

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 !!!

[@FastRust]

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

[@chrisclelland2783]

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.

[@FastRust]

Thanks Chris. Yep principle the same for the Dellortos just the location of stuff is slightly different. Good luck 👍🏻

[@chejlr]

This is great, i have 40 dcoe on my BMW 2002. They sound really raspy and loud. Im going to try this out. Ty.

[@fransterhorst3694]

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.

[@FastRust]

Thanks Frans. Good luck!

[@jacklee2577]

This is exactly what I needed to see, thank you for doing this

[@FastRust]

No prob. Thanks 👍

[@slushbubbles]

Really helped me tune the webers on my EE80 Corolla. Cheers! 😁

[@FastRust]

No prob. Thanks!

[@Jupiter__001_]

Nice.

[@m3ight102]

Thank you for this tutorial ! now i can tune my sierra's 45 dcoe carbs properly 😊

[@craigmccarthy4144]

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

[@afpreppie04]

Great explanation! I've been messing with my 45 for a while with little improvement, but now I have hope. I know a dyno/rolling road is ideal for jetting, but any chance on a video for that? Unfortunately nobody touches Webers around here.

[@FastRust]

Cheers Matt. It's difficult to be honest, I just leave it to the rolling road guys. If you had an AFR (air to fuel ratio) gauge it might be possible with trial and error. What engine are they on? You'll probably find someone online has posted jet sizes for your setup, which should get you pretty close.

[@afpreppie04]

Fast Rust it is on my Midget 1500. It is just a single 45 so I don’t have to worry about balance. I do have an AFR gauge fitted, and I’ve seen a few setups I can experiment with by trying their jetting. It seems I can get it running decent up top, or down low, but not all around.

[@FastRust]

I think you're just gonna have to keep experimenting with it. Small change - test. Small change - test. I used an online setup and it was pretty close as they only swapped emulsion tubes and air correctors (from memory!).

[@daw22936]

@@afpreppie04 Hey Matt, I've got a Spitfire 1500. Same engine as the Midget 1500. I've had all sorts of Webers on it. Started with a DGV 32/36, then moved to a single 45 DCOE, then dual 45 DCOE and now dual 40 DCOE. We have a facebook group that you might be interested in. facebook.com/groups/153355702093103/ Weber Carburetor Support Tips & Tricks. You can also find a nice jetting table here: www.carbparts.eu/jetting_table, although they seem to suggest a 3.5mm aux choke for a single 45 on a Midget...and I've always run 4.5. The main jet the suggest is also a bit much, I think. I don't think I've ever run more than 140 with a single DCOE.

[@afpreppie04]

@@daw22936 Thanks, I just sent a join request! I just put in the jets to match a setup from teglerizer.com that was almost identical to my own, I'll report back on the results. My flowmeter just arrived yesterday but sadly I can't fit it in one of the horns as it is too close to the inner fender.

[@joppejoppsson9604]

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.

[@FastRust]

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.

[@fatoldguy-mh1rt]

Thank you for clear and articulate information. Great sounding car. Bitchin ' burn out.

[@moggie100th]

Great video, and thanks for sharing. In balancing my 40 DCOE webers, the front 3 are at 5 on the air-flo meter but 4 is at 7. What would contribute to this carb being higher? Thank you!

[@Flakowire]

Great video only problem i have is it wont do idle , have to rev it for it to run if i dont rev it revs by itself and shuts off . Any ideas ? Thanks

[@kjetilros]

Best video ever on this subject. Thank you sir. Will be easier to get my escort running better.

[@FastRust]

Thankyou! Appreciate the positive feedback 👍

[@martinparker9249]

What an excellent video ....very straight to the point !

[@FastRust]

Thanks Martin!

[@craigturner4504]

Great content. Help me lots to set up my carbs

[@BillyBeatbox_BdaBX]

Thank you for your explain, i dont use this kind of carb, but the way you explain how to setting is great!

[@FastRust]

Thanks very much. Tried to make it as clear as possible.

[@BillyBeatbox_BdaBX]

@@FastRust crystal clear 😊🙏🏼

[@clutchkicker392ison5]

Brilliant, i had teachers not explain it so well. Cheers

[@FastRust]

Thanks. Glad you enjoyed it!

[@Nskawtea1]

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!

[@FastRust]

Thanks. This info should get you up and running. Good luck!

[@DKaraffa]

Thank You So Much!! This is an awesome video. Cheers brother from the USA!

[@FastRust]

Thanks mate. Glad you enjoyed it!

[@johnterpack3940]

Would it be roughly the same on the downdraft carbs? I hope to bolt a set onto my old Ford V-8 if I can find some that don't cost as much as a used car. I like tinkering, so all this adjustment looks like fun. And you really can't beat the look of four Webers with the stacks poking through the hood. Also, it seem like a wideband A/F gauge mounted under the hood would make tuning a bit easier and more accurate.

[@FastRust]

Yeah will be a similar process with any multi carb setup so you just need to adapt these instructions for your carbs. Stacks will look fantastic 👌🏻 What V8 ford do you have? An AFR gauge would be a great idea if you were tuning yourself. After having fitted one to the MX5 I realised just how useful they were. Tempted to fit one to the Capri.

[@johnterpack3940]

@@FastRust I have a 351W that I plan to stroke to 427. But it isn't going to happen within the next year. Too many other things taking priority.

[@OldHouseNut1]

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.

[@FastRust]

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 🤣

[@Robbo2498]

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!

[@FastRust]

Do love a Datsun. Glad the video helped. Thanks!

[@claymunsamy]

Great video.what jetting are on your 45s

[@johnblackmore4772]

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

[@garagetwentynine4023]

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!

[@FastRust]

Don't worry about it. As long as idle is set correctly and they're balanced you're good

[@alrobins6283]

really useful video - Im off to give it a go on mine now.... thanks for sharing

[@FastRust]

Glad it helped. Good luck.

[@MakeWeirdMusic]

Fantastic video. Thank you!

[@kuvo1527]

Thank you, I will test on my Murena.

[@dumptonpark]

Thanks for posting this card tune video done me a right favour. 🍰☕

[@aerobatics66]

Very good explanation for the carb tuning! Thanks!

[@FastRust]

No prob. Thanks for the feedback.

[@jockofthebushveld299]

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.

[@acbusinesscontinuity327]

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?

[@FastRust]

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.

[@mdtransmissionspecialties]

I’m very well with carbs. Just never messed with a set of these. I just ordered a set of webs for my 1972 1.6L 110hp 510 wagon. Are they relatively easy on the street if they are tuned right? I’m a Holley man so it’s no issue for tuning I just want really good drivability. Either way thanks for the vid I definitely saved it.

[@FastRust]

If you want good driveability I'd have stuck with a twin choke downdraft carb. DCOEs are performance carburettors and probably a bit overkill for your application BUT if you want them cos they look and sound awesome I can't fault you. They're okay once jetted and tuned correctly but be prepared to tweak mixtures and balance them regularly

[@IHaveASillyHaircut]

You want to stick DCOE's on a 110hp engine?? Not worth the hassle or the gains.

[@scottferguson5078]

When installing twin carbs do you need to install a new intake?

[@FastRust]

Yes of course, you need the correct intake for the carbs and the engine

[@leo45x91]

Hi buddy, I think I have a similar fuel pressure regulator as the one you showed in the video. How can I know what pressure the fuel is at when adjusting it? Sorry if it’s a dumb question 😅 thanks

[@FastRust]

Not a dumb question mate there's a blank above the outlet you need to remove that and put in a gauge to be able to read the pressure. They don't recommend running the gauge full time hence why I've put the blank back.

[@JACKSPEED_TV]

Nice mate, very well explained 👍 Just got mine back on and had a run out today.

[@FastRust]

Cheers mate. How's it running??

[@JACKSPEED_TV]

@@FastRust Yeah good mate, bit of popping low revs still.

[@FastRust]

We should do a head to head at Ric Woods!

[@JACKSPEED_TV]

@@FastRust Yeah man followed by drag race 😁

[@FastRust]

For slips?? 🤣

[@crispinimini]

The best vídeobregulation of mix carburator

[@FastRust]

Thanks Carlos

[@tyredryder1342]

Excellent, just saved me a heap of cash asking a tuner to help start up etc my 1965 Elan

[@FastRust]

Thanks mate. Nice car 👍

[@franciscoruiz6425]

Perfect video!!!! I have one question.... Do you recommend installing a couple of Webers 45 DCOE in a VW jetta(Mk2) 1.8 V8, yes ... No and why?

[@FastRust]

They might be a little overkill to be honest with you, 40s probably better suited. But even then it depends on the tune of your engine. If it's bone stock you'd do as well sticking to a twin choke like the 32/36. Apart from noise you won't gain that much using twins. If it's modified then yes it could be a viable option.

[@franciscoruiz6425]

@@FastRust thank you very much for the advice and the answer, I really like your videos!

[@FastRust]

No prob. Thankyou!

[@SH0winghackers]

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

[@kine8433]

Welcome back! Fantastic video! Your videos make my life much easier ;)

[@FastRust]

Thanks mate. Glad to hear it.

[@jjlad5037]

Very timely vid.... I've been struggling trying to tune my 40DCOE pair on a Ford 1.6l CVH. Despite everything I've tried, I still get popping (chuffing) out of the #1 Cyl carb. No vac leaks detected. It started after the car sat a couple of months over the winter. Cleaning the idle and main jets didn't help. Once I'm over 3000RPM, the car runs fine, so the issue is in the idle circuit. Any ideas?

[@FastRust]

It never ceases to amaze me how these carbs can run perfectly fine when you park it up then a few months later be out of tune! Assuming you've done everything in the vid, have you checked the float levels and needle valve?

[@jjlad5037]

@@FastRust ....that's the next task.

[@Videoswithsoarin]

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

[@ruibarbosa4312]

Great job! I have a Lancia Fulvia coupe, very first serie, with the 1215 cc engine. During my first engine rebuild I decided to go up to 1315 cc: this outdated the Solex 32 carbs which did have the legs to give me acceptable performance. I took a set of Weber DCOE 40's from my old Alfa Giulietta 1600, rebuilt them and made following changes: Venturi down to 28mm, F11 emulsion tube, 160 air adjuster, 112 main jet., 40F9 transition jet. It worked great on acceleration but it doesn't like to get past the 5500 rpm. Any suggestions?

[@FastRust]

Thanks! What happens at 5500rpm? Could it be fuel starvation?

[@ruibarbosa4312]

@@FastRust well, it goes all the to 6000 but by the time it gets there my hair is grey. The f7 emulsion tube has all orifices close to main jet: i believe this could be a good reason for getting too lean at higher rpm. I just don't know what is the best approach to correct this. Thanks a lot.

[@ruibarbosa4312]

@@FastRust the same applies to the f11. Would you recommend a different emulsion tube? Thank you

[@FastRust]

Going grey 🤣 So it's going lean above 5500rpm. I was going to suggest a restriction from the filters but that rules that out! Float levels okay? It's going to be a lot of trial and error without getting it to a rolling road to be honest. At 5500 you're all on the main circuit though. A larger mains jet or smaller air corrector could be worth a shot? If you want to change tube (I think) F16 and F9 have more regular hole spacing.

[@ruibarbosa4312]

I'll try it all, one at the time. I use a rolling dyno in the US but I have this Fulvia in Portugal, where I don't know the right circles of car crazy people. Once I get it going well, I'll let you know what worked for this little super square engine. Thanks a lot.

[@eaenlle]

What is an alternative to use of air meters as my Webers are mounted to a tight fitting air box. Is there a vacuum port on top of the carb?

[@FastRust]

You can get a 90 degree adaptor for these meters to access tight spaces. If not air box will have to come off

[@eaenlle]

@@FastRust Thanks for the quick reply.

[@jaferessop4412]

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??

[@FastRust]

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.

[@marn8136]

Excellent video.

[@israelrosario2896]

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

[@panospapadimitriou3498]

wanna ask you something. when you brake the car do you lose iddle due to brake drum air linkage ? ? some guys recomended me to relocate it in my setup cause i see it involves to rpms.. just when i brake it most times i see a tiny change to rpms and i think the first carb that has that big linkage is the one that loses tiny working

[@FastRust]

Can't say I've ever really noticed. With my twin carbs the vacuum for the brake servo is only taken from the one runner which isn't ideal, in fact I doubt it does much to be honest.

[@Mk7adxm]

Great video man, I’m going to be getting a Weber 32/36 carb for my Ford Capri 1.6 Laser 😃

[@FastRust]

Cheers. Great carb that. In a lot of ways I think it's better than the 38DGAS.

[@RockyM-g4r]

Great video!! I need an advice..... Im interested in a WEBER carburetor conversion Kit for my VW Jetta Mk2 year 1991 (1800 engine) water cooled. What's the bes carburetor for that engine o conversion kit? Thanks for your help!

[@FastRust]

Thankyou! Nice car. Do like an old Jetta. If it were me I'd be looking at a twin choke 32/36. Brilliant carb. Ran one for years. It's progressive so you can cruise around (fairly) economically. Then when you floor it, it opens both barrels and away you go. Can't say enough about it. Really solid choice. Better than the 38DGAS that is a common 'upgrade' for a 32/36 in my opinion. Hope that helps.

[@RockyM-g4r]

@@FastRust thank you very much!!! 😎👍

[@martinnielsen3592]

You make it look so simple, thx m8

[@FastRust]

👍 no prob.

[@Omegaman1969]

What is the hole for above the left most trumpet?

[@barryloar2667]

Novice question in reference to ONE TURN, I always assumed it would be one 360° rotation of the "slot" on the screw. Your video indicates one 360° slot rotation is half of a Weber "full turn"...correct? Thanks for the tutorial.

[@FastRust]

Hey Barry. Just one full turn mate, back to the same position.

[@Sierraman59]

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 :)

[@FastRust]

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 👍🏻

[@HungrySharkMaster]

What do we do if our carbs don’t have a balancing screw in the middle of the two and instead have a throttle shaft hinging down on each carburetor with adjustable linkages?

[@FastRust]

Use a balance meter like the one in this video and adjust the balance at the throttle linkages. Once you've done that reset idle speed and away you go.

[@victorpelini5995]

Nice vid ! I got a mild 2.0 I4 that I want to convert to twin Weber's Do you recommend dcoe 40 or 45 ? Street driven engine, daily, want reliable over power

[@FastRust]

Cheers! From what you've said I'd go 40s, they may not flow as well at full chat but they'll be more driveable 👍

[@victorpelini5995]

@@FastRust Yeah, it's kinda annoying, I might go with a big big cam and some porting + nice exhaust tho. Volvo redblock. But i'll be limited at the valves anyway... I bought a nice weber tuning manual to help me educate my choice. Plan on running a wideband AFR to better monitor, even if it's not really a must with carbs ^^

[@FastRust]

Yea it's one of those things. When I got my 45s they were a bit overkill for the setup. But now with the performance head & big (ish) cam, they work well. If you're thinking you may go down that route in the future, I would consider 45s, but as is, 40s will do I'm sure.

[@FastRust]

AFR also a handy thing to have. Tempted to do it myself.

[@victorpelini5995]

@@FastRust at 220€ for the good AEM ones, it's a bargain. Just mount it in the correct position, so many sensors gone bad bc they were not correctly installed... Y know wht I mean

[@daos3300]

great vid. would be weary of running w/o air filter anywhere other than a racetrack.

[@FastRust]

Thanks👍🏻Yeah there's always a risk running without filters, not gonna lie!

[@FKGZ19]

By the way, couldn't you adjust the air bleed before mixture? So you won't have to adjust again?

[@FastRust]

Yes of course. I chose to film it this way because in some cases it's not applicable as not all DCOEs have them. Also some people choose to skip this adjustment anyway.

[@FKGZ19]

@@FastRust yeah i got that you said it also in the video. I m kinda amateur so i just wanted to confirm that you can adjust it before. Thank you keep it up!!

[@FKGZ19]

do you have a guide on how to install fuel pressure regulator as well?

[@FastRust]

No I don't, sorry. It's not too difficult, especially if you're sticking with the mechanical pump. It just needs installing between pump & carbs.

[@FKGZ19]

@@FastRust is it possible to recommend or link to your specific FPR?

[@domenicrizzotti9110]

Do i Need venturis? or can i run 40's without choking them down on my 1.8l M10. I am new to this

[@senna138]

I've been tuning my single weber on a 2.0 pinto race motor in a 71capri race car for the last two days.. I found the sweet spot with the mixture screws. It runs smoothly at high revs but the idle is still pretty shaky at 1000-1100 rpm. Air bleed screws are seated. My fuel pressure regulator is set to 3 psi. Main jets are f11 and idle jets are f8. Any suggestions on how to smooth out the idle? It has a mild cam ( engine was built by Ivey engines in Portland Oregon).

[@FastRust]

Hey Herman, great car you have there. From what your saying I'm not convinced it's a carb issue - although it's difficult to say without seeing it. What's your ignition timing set at?

[@senna138]

@@FastRust initial timing is 9° btdc and total timing is at 38° @4500 rpm.. I'm adjusting my valves as I type thanks to your other video as I've noticed all of my clearances are too tight. Im supposed to have .008" lash on intake and .010" exhaust according to Ivey engines site F.A.Q. section all the way at the bottom. Thanks man, your videos are invaluable! After I get this sorted I'm sure I'll be asking you about your alternator wiring as mine wont charge. Cheers! P.s I just found out the vacuum port on the bottom of my intake manifold wasn't plugged haha, making some progress!

[@FastRust]

Good find! A vacuum leak like that will definitely affect your idle quality. Timing sounds about right. You could try push initial to 10-12btdc, and see where that gets you. That will put you at 40 max advance, a little high, but if you don't get any pinging/pinking, it should be fine 👍

[@ericferrell7897]

Hello, first of all, great video! I have been working to tune and balance my two DCOE 45s. My sync tool is reading a very high number, about 15. I think I need to bring it down to the 5 range, right? Every video I watch has that reading. How would you suggest bringing that number down?

[@FastRust]

Thanks Eric! I don't know what balancer you're using but I wouldn't worry about it. The only way you'll reduce the reading is by decreasing the idle speed. So assuming it's set correctly, it's fine 👍