I am useing the single solinoid type Blitz EBC S and it works spot on,["did not use the twin sol.valve R"]. it locks onto the four adjustable settings it has been set at. I found it worked OK with the single solinoid valve using the standard 300ZX manual transmission Twin turbos installed using a Y connector and keeping the lines as short as possable and the same lengths to the Y fitting. The 4 adjustable boost settings are #1=8psi, #2=10psi,#3=12psi,and#4=14psi . Dyno results with some other mods with boost pressure set on #4 @ 14psi was 320 RWHP . Advise use a good boost guage.