The Protec system may be a relabled and recovered micro touch, looks similar. Here are some pics of mine. Yellow wire is your rpm signal wire, wraps a few times around plug wire near the spark plug. Black and red with inline fuse holder are B+ and B-, white harness to your water control soliniod...........The rpm is adjusted with those buss bars...............The other pic shows some of the factory pipe ewci system, you can see the strainer with the small blue hose, if you look down into the ski you can see the factory pipes silver colored water strainer cylinder with clear braded hose that the water injection soliniod normally attaches too on their set up.
With a dry pipe and its water jacketed continues cooling of the pipe we can turn extra water on and off at will.
The B-pipe has no water jacket for cooling so it needs water spraying pretty much all the time, so guess it will be, where to inject, where to inject extra, when to turn extra on and off, or close off all the b-pipe screws and use only the Ewci system or a combination of the screws and Ewci system
Iam interested to see what others say on the B-pipe Ewci set up, a guy was selling the factory pipe Ewci set up on ebay and it was from a b-pipe but he did not know if the system was in working order and was just parting out the ski so he had no set up info, i think i remeber the spray bar being mounted in the top of the head pipe though
