TheSamba.com :: View topic - Final Factory Dual Carb Adjustment Procedure

Fri Oct 28, 2011 12:27 am

Euro buses never had a charocal filter. Gas vapors are routed straight into the air cleaner.

Fri Oct 28, 2011 6:36 am

spaceball1 wrote: Can these carbs be used without the breather? Can I just use some universal charcoal breathers? I don't think I have the breather for this set-up...
Breather as in crankcase ventilation or do you mean air filters?

Fri Oct 28, 2011 8:44 am

Sorry. Yes, air filter.

Fri Oct 28, 2011 10:51 am

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.

Fri Oct 28, 2011 11:45 am

Cool, thanks for the info!

Mon Feb 06, 2012 6:08 pm

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

Mon Feb 06, 2012 7:00 pm

If you blank off the manifold holes how will the idle mixture get to the engine?

Mon Feb 06, 2012 9:19 pm

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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Mon Feb 06, 2012 9:37 pm

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?

Mon Feb 06, 2012 10:13 pm

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.

Mon Feb 06, 2012 10:41 pm

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.

Mon Feb 06, 2012 10:58 pm

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