ZSSC can switch between reading boost or rpm. No boost control.Therefore no clash with AVCR
The ZSSC gives you the ability to raise the rpm switch points (within in a given rpm range).
Single turbo --switch point--> Twin turbo mode (later)
Twin turbo --switch point-> Single turbo mode (earlier)
Old: Wellington St, Howick Domain next to the Rifle club
New:
Realised its pretty vague and the photo doesn't really show much but will be happy to put up a new one or provide a hint if needed.