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> Weber Carb Restore Questions, Manifold preferences, Manual Choke, etc..
Literati914
post Aug 5 2026, 07:13 PM
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I'm going to restore (try to) a set of Italian Weber 40idf carburetors to put on a 1.7 engine. I have two sets of manifolds... one set has a vacuum port on one runner (each side of engine), and the other has none at all. Is one type favored?

Which do I want to use, and why? - I have no idea what the vac ports would connect to. If they help even out idle, I'd want them I guess. Thoughts?
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porschetub
post Aug 5 2026, 10:31 PM
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the inlet manifolds you describe with the large vacuum fittings would have been used on a t4 VW bus most likely ,they are there for power brake servo so not needed the plain ones will be fine on a 914.
Pick up vacuum from one carb with the SVDA dizzy and you will be fine and block off the unused one on the other carb ,just make sure the carbs have 28mm vents and moderate jetting for a 1.7 otherwise it will run like (IMG:style_emoticons/default/stromberg.gif) ,cheers.
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