Need to decide between those two setups

[keithmac]

All the injectors fire at the same time from the main pump, I`m using a Greddy Emanage to map my fuel and ignition; it also controls the WI (9psi).

I`ve wired my Wideband AFR meter and Boost controller via a switch circuit so a lean condition will shut off the boost controller and drop boost to wastegate pressure.

My fuel map leans out after 9psi, if the WI is working correctly the AFR will remain at 11.5:1 because of the added alcohol and the boost controller will be active. If the WI fails the AFR will be leaner than 11.5:1 (above 9psi) this will imediately shut down the boost controller and I`ll be back at wastegate pressure.

What happens in practice is the AFR will be at 11.5:1 at 9psi, it`ll hover at 9-10psi for a second or two (alcohol hasn`t had time to enter the combustion chambers yet, over 9psi the fuel is being trimmed out so AFR is too lean to turn on boost controller), once the alchohol gets going the AFR`s will hold 11.5:1 all the way into boost and redline.