Charcoal canister venting w/ dual Webers

[BruceJ]

I have dual Webers in my 72 Bus, a very common setup. I often see the oil breather hose feeding into one of the air cleaners, and I have set up mine this way as well, into the right side carb. But one thing I rarely see addressed is how folks run the hose from the charcoal canister, the one would have originally run to the air cleaner. Given that the original Solexes and associated hardware were long gone by the time this Bus found me, what's the best way to do this with an aftermarket set of carbs? Should I simply feed that line into the other carb?
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1965 Beetle
1972 Westfalia

[germansupplyscott]

You should have a nipple on the fan shroud that will go to one of the two large nipples of the canister, this is the pressure side. The other end of the canister should have two nipples, one large one small. The large one can be plumbed to the air cleaner, the small should go to the same place as it did originally, which is a rubber tee that sits close to the canister.

This is all assuming you have the original oblong canister in the original location on the ceiling of the engine compartment.
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SL

[BruceJ]

[busdaddy]

The canisters all fuction the same, oval, round, plastic or metal.
Many run no canister because they don't understand the system, of think it's some power robbing smog component, it does play a part in smog, but it's passive and doesn't rob any power. Some are so clueless they connect a line between the two vents with no Tee, that seals up the tank venting system and leads to....., wait for it....., loss of power!

One carb is fine, there's so little actual fuel vapor in the purge air it won't effect mixture, and the worst of it is immediately after starting so it's likely a little enrichment when the engine is cold is welcome anyways.
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[BruceJ]

Ok, makes sense BD. As for me, I guess I never stopped to think about what all those unconnected lines on the ceiling of my engine room were all about. I figured it just had something to do with the long-gone original intake system, or an anti-smog device with little or no direct effect on my own wellbeing.

Thanks all for straightening me out on this.
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1965 Beetle
1972 Westfalia

[Abscate]

An added benefit of running the evap system is it “ closes “ the fuel tank to incoming air and condensation of water into the fuel. Not relevant in Scorpion land but in the Northeast with temperature variations this is important.
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[SGKent]

just make sure there is always a flame trap in the system so one doesn't have a backfire that does more extensive damage. That is true for the engine breather system too.
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Canned Water - the new California approved parts cleaner (except in a drought in which case rub it with sand).

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[lil-jinx]

to address the slow fueling problem,could one put a valve, in the vent line,that opens to atmosphere ,and just open it when fueling allowing air to escape.
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1974 Bay Westfalia. she likes to be called Ethel.
1968 Dune Buggy sold dec 2024

1974 parts bus
A smart man learns from his mistakes,a very smart man learns from other's mistakes.

[germansupplyscott]

[BruceJ]

[germansupplyscott]

This is a '72. Yes you could make the bent metal line.
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SL

[Abscate]

NiCopp is much easier to handle than a steel line and cost less than SS. Available from the jungle. Take a look at your brake lines and see if ordering a spool ( much cheaper than buying by the foot) makes sense
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