To be honest Steve,we used to use these on twin carb set-ups on VW racing engines and frankly they didn't hold up well.
I
do agree Webers and most other carbs for that matter will benefit from a steady,pulse free fuel supply and to that end we used to use these,a
Malpassi Filter King regulator.
They were used on many Italian exotics such as Ferrari with their multi carbed engines,they can also be retro fitted or bought with a pressure gauge for fine tuning and as an added bonus they have the filter.
I also feel they look much better in an old trucks engine bay.
