Note 1 The bottom end seems to be a lot leaner but power appears fairly rich with dull transition power to 3200rpm, then excellent from 3300-5500. High speed runs with constant rpm's of 5500+ were not as powerful as expected. The engine seems to stop breathing at 6000rpm and get hot at highway speeds of 75-80.
Note 2: The bottom end seems to be lot leaner, burst power is significantly lower (acc pumps) mid-range is a little better and top end is still wanting..
The above settings were provided by PMO for the 2.0L and larger engine while the settings for engines smaller than 2.0L are actual settings provided by 356 owners.
You should go through your Carbs and make a note of all the sizes of the different components. This is especially true if you bought used Webers as the previous owner (PO) may have used jets that are not matched.
This will help in the trouble shooting if you have any problems. The sizes of jets are only finalized by trial & error. Many variables can affect your Weber’s performance such as fuel quality, elevation of driving area, engine options and the environment. All of these things must be taken into account when trying to determine the proper jets and sizes for the other changeable components.