An amal valve is just a mechanical bleed valve. It is opened when the ignition is turned on, it then bleeds of a quanity of air dictated by the size of hole drilled into the restrictor in the vent outlet.
So I feel it a little optimistic to call it an EBC
This is what I thought. It's more ELECTRIC than ELECTRONIC!??!
Modern boost controllers use very high quality valves and microprocessor control. The Gizzmo MS-IBC is probably the best there is when it comes to cost vs performance. All the Jap controllers have rocketted in price, where the MS-IBC is still around £200.
