I am presently in the process of upgrading my water injection system from a 1S to 2C which uses the high speed valve (injector) to meter the water flow , this valve is to be controlled by an aftermarket ECU , the question is , since the only pulsed output capable of firing an injector is the boost control , how do you tune it since it is set up as pulse-width vs. RPM and I can carry my RPM to 7000 with out boosting ?. I am thinking of wireing a pressure switch in series withe the injector to only supply power under a pre set boost, what do you guys think?

 

Actually no I dont , the simpler the better , So is that the way you set up yours ? , did you just connect the HSV in parallel with one of the secondarys and maybe use a resistor , is the pressure switch in parallel with the HSV ( to "make" the circuit @ 10psi) , please give more details .

 

If I run it parallel then I would not be able to separate the water and fuel programming ie , if I want to lean out the fuel a little for more power then the water would also be reduced ,this is not good. To avoid this I have decided to use a PWM output set to BOOST CONTROL, since this is for modulating a solenoid valve it should work. To have the system activate at a specified RPM I'll use an adjustable ERL switch wired in series with the High Speed Valve/Injector.let me know what you think , thanks.

 

Marcel, Keep us posted on how your set up goes. I am trying to decide how to set it up.

 

I am almost done with a rebuild , after which comes the break in , so I'll let you know in about six weeks.