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AS I POINTED OUT PREVIOUSLY, the Uni-Syn is a great and essential tool, I have 5, three different variations, can do anything from a twin to 12 cylinder, Webers, AFB and Holley, all sorts of carbs, but, some of us have found better ways for WE to do things than waste the time to move a tool from carb to carb to balance them, same as the Uni-Syn tools require..
As I also pointed out, that Walms also said, the manometer can use any form of liquids, mercury, french fry cooking oil, root beer, whatever, and, the Carb-Tune mentioned uses stainless steel floats to read the vacuum line draw, not bad at all. The original manometers that used mercury were produced and offered under the tool mane "Carb-Stix".
To make a blanket statement that my "facts" are only my own, is ludicrous, at best. All a person needs to do is to go visit for them selves, the topic about the Carb-Tune on KTOG that this topic evolved from, and read what those people have to say about using that tool, and the Uni-Syn, and one will find that they both work excellently. It then reduces down to what a person, each individual, has to say about what they use, and how it works, or doesn't, for EACH INDIVIDUAL, their experiences, NOT a statement that only the Uni-Syn is the easiest, bestest, mostest fun way to do it, and another persons 'facts" are not valid, nor wanted on these boards, simply because that person, personally disagrees with the poster.
To each, their own, but real facts are just that, many have found that a manometer, of any kind, works as well, or, in some cases, a lot better than the equally excellent Uni-Syn.
Two things are painfully true, past all this, balancing a 4 stroke multi-cylinder carb set is a PIA, and giant time waster with a Uni-Syn as the air filter ducting MUST be removed to use it, over a manometer, and both manometer and Uni-Syn methods are far, far better than the original 4 vacuum gauge sets that Honda offered for their first CB750 balance efforts. With those sets, there were 4 individual gauges, with a damper valve for each gauge. The idea, dampen the gauge from individual intake pulses, allowing the gauge to read steady, not oscillating. Well, the problem is, no two gauges read the same at ALL vacuum levels, they might read same at one vacuum level, but, anywhere else, no dice.
I leave it with the users here, do as you wish, both manometer, and Uni-Syn are =, to my view, essential tools for any good mechanic to have, shop or home use.
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