What PSI?

[chopperboy]

What psi should water be introduced?

[Richard L]

When you go over the manufacturer's power output, we will need some protection. Just a quick and simple reply.

Richard

[JohnA]

Just to add ---> during hot summer days you may want to experiment with activating the W.I. a few psi earlier on, so you can stop the manufacturer's protection measures from taking place (like excessive ignition retard and boost lowering)