Reviving NOS Webers, Initial Settings? |
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Reviving NOS Webers, Initial Settings? |
bbrock |
Mar 20 2019, 08:55 PM
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#1
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914 Guru Group: Members Posts: 5,269 Joined: 17-February 17 From: Montana Member No.: 20,845 Region Association: Rocky Mountains |
I didn't want to hijack the other thread but have a question about my own Webers. They are Italian 40IDFs I bought in the late 80s or early 90s. Other than finger tight bolting them on to my engine to see how cool they looked, they have never been used. No fuel has touched them. I don't remember if I even opened them to set the float levels. BUT... they were stored in a humid basement for several years before I moved to a civilized climate. So, the magnesium housing is tarnished on the outside and the plating has deteriorated on a few of the levers and such. Pretty minor stuff from what I can see.
My question: is there is anything special I should do or check other than inspecting for corroded parts and normal setup as I prep these for service? |
bbrock |
Mar 21 2019, 08:21 AM
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#2
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914 Guru Group: Members Posts: 5,269 Joined: 17-February 17 From: Montana Member No.: 20,845 Region Association: Rocky Mountains |
The float needle tip can harden with age so I replace those along with pump diaphragms. Check your fuel pressure you'll want 3 ~ 3.5 psi. Your 40 IDF's may have come with 28mm venturi, this is fine for a stock 1.7 or 1.8 if you have a 2L I would recommend 32mm venturi. Note: The vintage IDF's are not drilled for port vacuum, they have manifold vacuum only (the vacuum port is below the throttle plate). Depending on which distributor you are running you may or may not be fine with a lot of vacuum advance at idle? I wanted my vacuum advance to drop out at idle so I set up an electric vacuum switch and control it with a micro switch on the carb linkage. Tim Not trying to start a (IMG:style_emoticons/default/stromberg.gif) storm but I don’t agree with the comment that needles will harden. Needles are brass. There is no magic in material properties over time. Brass or stainless. Materials will work harden but even that is a stretch as needles are under no real load. As I understood the situation these are basically new old stock and don’t even have any use. Yes, no use. None of the parts have even touched fuel. Only taken out of the box to see how they looked. But thanks for the tips on setup. That will be another bunch of questions as I get closer to test final assembly on the engine. (IMG:style_emoticons/default/beerchug.gif) |
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