My synchro gauge

imported post

To synch the carbs I would tend to say you need two individually ran vacuum gauges to get an accurate reading. or a liquidfilled manometer,I use antifreeze. There's plenty of old post on this site.

imported post

Nothing wrong with his design, and in fact the most accurate way to sync the carbs is with a single gauge - because there will never be any error between the gauges.

imported post

jimmypanhead wrote:

To synch the carbs I would tend to say you need two individually ran vacuum gauges to get an accurate reading. or a liquidfilled manometer,I use antifreeze. There's plenty of old post on this site.

Click to expand...

If you use several gauges you have to sinchronize gauges first!