Is anybody using a manometer Options

[930cabman]

Weber recommends using a manometer to synchronize multiple carbs. I have been running Weber carbs for many years and used a Uni Syn and recently have been using a snail. Seems to get things close, but never exact spot on. I can get good starting, idling, pulling, top end, but have a small hiccup sometimes.

I am unsure how the vacuum tubes will connect to either 40 IDF or 40 IDT carbs

[Shivers]

The manometers I have used were for checking pressure between zones. I would think that a snail is pretty darn close to a manometer. Since you are checking pressure in the carb. I use a piece of hose in my ear and the other end down into the carb. The sound in the throat changes with the screw turns so just get the sound the same. Sounds dumb but it works. And old timer taught me that 50 years ago so I have never used a snail.

[Superhawk996]

Weber recommends using a manometer to synchronize multiple carbs. I have been running Weber carbs for many years and used a Uni Syn and recently have been using a snail. Seems to get things close, but never exact spot on. I can get good starting, idling, pulling, top end, but have a small hiccup sometimes.

I am unsure how the vacuum tubes will connect to either 40 IDF or 40 IDT carbs

A manometer isn’t going to give you any fundamentally different info vs the snail.

Manometer use is more common on multi cylinder motorcycles and there is usually a port for each carb. You can modify IDF to have a vacuum port on each barrel but they are not set up that way by default.

Your hiccups are likely from ignition issues. What distributor are you using? If I recall you were using an old school 009 mechanical advance. Those are notorious for flat spots and hiccups . . . I used to use one. I eventually had to recurve mine . . . And even then it wasn’t perfect.