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Vacuum line - carb to dist.

I was thinking of replacing my vacuum advance line from my 34PICT3 to the SVDA dist. and recalled a friend's rock stock 71 bus with the original metal "up and over the float level" line. In understand why VW did this, but here's my question: Is the actual inside diameter of the line critical - not where it hooks up to the dist. or carb, but the actual line ID itself. More specifically, is the vacuum signal to the dist. the same with a 3/64" ID line vs. say a 3/32" ID line? TIA Bill.

Reply to
Bill
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This is a case where size does not matter :-)

Speedy Jim

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Reply to
Speedy Jim

What is the reason for the "up and over the float level" routing of this vacuum line, and is it important? I just used a bit of rubber hose here...

Peace, Harry

Reply to
Harry Smith

It's an anti-siphon loop, to keep fuel droplets from being sucked into the vacuum chamber.

Speedy Jim

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Reply to
Speedy Jim

It doesn't seem like there would be much in the way of flow there...is this something I need to worry about?

Thanks, Harry

Reply to
Harry Smith

Well, I wouldn't obsess over it :-)

Reply to
Speedy Jim

But keep in mind that VW made a tube for this 'problem'.

VW would not have spent the time on R&D and making and installing a not-needed part........

Reply to
Karl

part........

This part is to prevent deterioration of the diaphragm in the vac cannister of the distributor.

Reply to
anton

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