Mostly as the picture shows-- about 20psi (1.4bar).
I've been using system 2D for a while.
Recently I put a digital pulse adjuster before the controller, so I can adjust the injection duty cycle more freely, thus a more preferable water map can be obtained.
With this help, these days I dialed up the boost somemore, to 22~24psi range. The poor old little thing is still running smooth & strong
(note that the compression ratio of this antique 8v engine is 9:1 !! )
Water is so cool
