Tuning Dual Webers, Mikunis, Dellortos, Solex SU Carbs.

My quick method of tuning dual carb setups.

[@nathanaelvanwyk3874]

great learning curve for me that only started 2weeks ago with my twin dellortos 40s fitted myself tuned it my self not running 100% but im getting there as im learning by watching videos havent got that type of money to send it away for a proper tune but im learning and teaching myself how to tune it and to get it up and running 100% thanks again for your content was very helpfull to me as a young teenager 22years💯🤝running it on mk3 jetta 1.6carb

[@NoCarLeftBehind]

Glad to hear it helped. Congrats on getting it up and running. Keep at it. Thank you for your support.

[@eddiecruz5591]

That a cool dragster! Datsun powerd! I have built lots of Datsun engines over the years! Great little engines, really good information.

[@NoCarLeftBehind]

It's hard to beat an L series Datsun! Thanks for watching.

[@iaindoole4060]

Great video . Thank you. All the best from Scotland Lotusman .

[@NoCarLeftBehind]

Thanks for your support!

[@gravewalker8723]

great vid, ran a pair of 45,s on my old mk2 lotus Cortina ,and 50,s on a old mk3 ford Capri ( uk) , great carbs always gave great power and sound

[@NoCarLeftBehind]

Nothing beats that sound! Thanks for watching.

[@jamesford2942]

Simple, straight forward. Thanks for making this video.

[@NoCarLeftBehind]

Thank you for supporting my Channel!

[@ShamKatwaroo]

Any Webber for a 1600 Datsun for sale use

[@truthboomertruthbomber5125]

If you will fab up an idle speed screw on the center shaft of the linkage and then remove the 2 idle speed adjusting screws from the carbs you will then only have to adjust the length of the down rods to set the synchronization. After this mod any adjustment of the idle speed will not throw off the synchronization. Multi cylinder motorcycles have been doing it this way since the early 70s. It’s crazy that dual carb automobile setups have not copied the motorcycle technology.

[@NoCarLeftBehind]

Yep, the automakers do it that way as well. My Datsun wagon is setup that way. As was my 240z that I sold. Unfortunately the cheap linkage manufacturers never got the memo. Thank you for watching and the comment!

[@donaldshidal851]

Good info here. However it only covers the idle, while ignoring max turns on the mixture screw. Transition, air bleeds, emulsion tubes, main jets, chokes. I find I can get a more precise idle mixture with a colortune.

[@NoCarLeftBehind]

All great topics for future videos. I was just touching on linkage setup and syncing. Thank you for the comment, and for watching!

[@keithhoughton4308]

Hi, very useful video, thanks. Is fuel level critical for idling? I'm struggling to keep the engine running below 1200 revs which I think is in the transition zone. I can't see any fuel at the bottom of the idle tube. Should the jet be below the fuel level? I've got 3 45's on a straight 6 Jaguar 3.8. Thanks again.

[@NoCarLeftBehind]

The only time float level effects run ability is when it is so out of adjustment that it's either flooding or starving. The orifice that supplies fuel at idle is under the throttle blades, so you won't see anything. If you have the idle adjustment screws turned all the way out and it still idles high, I would look for vacuum leaks or check the advance springs/weights in the distributor. Good luck.

[@keithhoughton4308]

@NoCarLeftBehind Thanks, I'm getting there. Your advice on the linkages led me to the centre carb which wasn't closing fully. Also, I found the two chokes on 1 & 3 were out of balance using the synchronising tool. Fortunately, these 45's are fitted with the extra screws to adjust each choke independently. I'll need to keep on top of these babies!

[@1970ronin]

great video, could a plugged idol jet cause the airflow to be way out of balance on one carb?

[@NoCarLeftBehind]

@@1970ronin the idle jet won’t effect air flow too much. The engine is really just an air pump. So it will still draw the same vacuum. There is an air bypass that will balance the individual throats of each carb.

[@1970ronin]

@@NoCarLeftBehind so I should probably check the air bleed screw. Thanks for the help

[@erichlausch9886]

🏁🏁🏁🏁🏁

[@jarmominkkinen9409]

I dont hear no wath The fjeul pressor you have? I Have Dellorto Carborators 48mm Chevy 356cui.3psi are The max. I run real Street Corvette car 1992 10 sek car 210kmt near..1600kg car No no transbrake!! Even Weely inte start.Yes thes are trou.Still havThe Corvette build 1995-96 Twin Turbo Efi Vems. But match Trouble hope I can come out 2025.

[@NoCarLeftBehind]

My fuel pressure is at about 3 1/4 psi. Good luck with your project and thanks for watching.