Final Factory Dual Carb Adjustment Procedure FAQ

jure-slo · Posted: Fri Oct 28, 2011 12:27 am Post subject:

Euro buses never had a charocal filter. Gas vapors are routed straight into the air cleaner.
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'79 Bay-window, 2.0, duals solexes, automatic
'76 Triumph spitfire 1500
'86 Polski Fiat
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busdaddy · Posted: Fri Oct 28, 2011 6:36 am Post subject:

spaceball1 · Posted: Fri Oct 28, 2011 8:44 am Post subject:

Sorry. Yes, air filter.
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'73 Westy
'70 Westy
'71 Ghia

busdaddy · Posted: Fri Oct 28, 2011 10:51 am Post subject:

You have to run some kind of filter, the stock 73 bus one (square plastic box with a pizza slice sticking out each side) is super quiet, efficient and usually cheap and easy to find, aftermarket ones won't have any preheat provision so it'll run like ass on cool humid days. And you'll have to devise a way to connect the CIS intake to the filter.
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spaceball1 · Posted: Fri Oct 28, 2011 11:45 am Post subject:

Cool, thanks for the info!
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'73 Westy
'70 Westy
'71 Ghia

nadafornada · Posted: Mon Feb 06, 2012 6:08 pm Post subject: EGR n Spiderleg Question

Hi. i read your post on carb adjustment learned alot. was hoping u my b able to answer my question. i have a 74 westy original 1.8L w the original carbs.
I have removed almost all of my EGR n Smog equipment. i still have the spiderleg for idle curcuit. Question: can i remove all parts n hard lines blank off holes in manifolds ? I understand i need to keep an idle curcuit but i can fab one.
Thanx

busdaddy · Posted: Mon Feb 06, 2012 7:00 pm Post subject:

If you blank off the manifold holes how will the idle mixture get to the engine?
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nadafornada · Posted: Mon Feb 06, 2012 9:19 pm Post subject: EGR n Spiderleg Question

i have many ports or holes in the carb manifolds from the spiderleg used in the smog design on this 74 California Model .
my question is now that i have removed all of the pumps and filters that needed these connections i have the spiderleg closed off at points but would like to remove the spiderleg n fab my own straight across idle curcuit. Eliminating all the extra pipes n holes in my manifolds.
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busdaddy · Posted: Mon Feb 06, 2012 9:37 pm Post subject:

If by "spiderleg" you mean the CIS pipe that connects between the CIS port on the LH carb and the bases of the 2 manifolds you still need that, you can delete the extra pipe that runs/ran rearwards to the afterburner pump but it'll be a pain to adjust the idle with the rest gone. As for extra ports on the carb the only one that comes to mind is the EGR control on the RH carb and the retard on the LH if you are running a SVDA. The rectangular EGR ports on the manifolds can be capped with blanking plates that you fabricate.

Sure you want to do all this? what if your local authorities decide everyone has to smog all of a sudden?
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nadafornada · Posted: Mon Feb 06, 2012 10:13 pm Post subject: EgR n Spiderleg Question

Yes u have it now. i understand the need for the CIS pipe for idle circuit.
Yes u have it on the SDVA/EGR LH/RH control pipe. i need new gaskets or can blank off w fabed plates. Stil confused on the pipes running into tops of Heads? can i remove n cap /plug those off also?

i picked this bus up w half a smog n EGR system n right now just trying to get her running w no vac leaks. then build her back up.

busdaddy · Posted: Mon Feb 06, 2012 10:41 pm Post subject:

You can blank the EGR with fabbed plates, a gasket is nice but red or copper silicone works too, or even cork or paper, they don't get real hot with no EGR.
The afterburner ports in the heads can be plugged with 10mm valve adjuster screws or bolts.
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Rust NEVER sleeps and stock never goes out of style.

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nadafornada · Posted: Mon Feb 06, 2012 10:58 pm Post subject: EGR n Spiderleg Question

I want to start by saying Thanks for taking your time to answer all of my questions.
a valued resource n great people,

Good Project. Gonna work it out tomorrow.

Thanks Again Friend

eddyvdw · Posted: Tue May 29, 2012 1:24 pm Post subject: Synchronizing CO left and right

First of all, awesome post. It taught me all I wanted to know about dual carbs but was afraid to ask...

When synchronizing left and right (pull the solenoid left to check right and vv) my engine stumbles and finally stops. With both cabs on but idle solenoid off it runs nicely at 500 rpm. Is this too low?

Cheers,
Ed
(The Netherlands)

yellowdcap74 · Posted: Tue Jul 17, 2012 12:10 pm Post subject:

That fan that is shown on Diagram 3, chokes etc...

I know this is unrelated, but what is the name of this fan, what is its purpose, and where can I get the tubes that go to and from it to the heat exhangers.

Thank you,

John Smile

yellowdcap74 · Posted: Tue Jul 17, 2012 12:10 pm Post subject:

That fan that is shown on Diagram 3, chokes etc...

I know this is unrelated, but what is the name of this fan, what is its purpose, and where can I get the tubes that go to and from it to the heat exhangers.

Thank you,

John Smile

flaquito1 · Posted: Thu Jun 20, 2013 11:48 am Post subject: dual Solex carb adjustments

Now...How does having a 009 distributor in this same engine configuration throw a wrench in this scenario? My Brother just bought a 1974 Rivera with a rebuilt 1800 (probably 1835), same carburetion and a 009 distributor best I can tell (no vacuum pot), no vacuum connections. BTW, it is definitely a type 4 engine. Seems to run ok but I know it will need adjustments eventually! Just checking. Thanks.

geopanoramic · Posted: Tue Jul 23, 2013 10:40 pm Post subject:

hi - crossed the country in a 1972 with duel carbs in 1987. What an amazing nicely illustrated post! I really enjoyed it and am stoked these kinds of resources are here for some of us mere mortals.... carry on, Colin!

wdollie6 · Posted: Thu Apr 16, 2015 8:26 am Post subject: Missing Graphics?

Is it only me or have the graphics disappeared from the original post. I am at the point of synching my "dual carbs" was hoping to utilize this outstanding post as a guide.

Can anyone help as my browser is showing an [x] where the pictorials should be.
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1966 Beetle, Sunroof, Sea Sand
1970 Fastback, Deep Sea Green (... or will be)
1972 Super Beetle Convertible, Texas Yellow
1972 Westy, Sierra Yellow

airschooled · Posted: Thu Apr 16, 2015 8:48 am Post subject: Re: Missing Graphics?

sparky892 · Posted: Mon Jun 29, 2015 3:35 pm Post subject: Carbs


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