And I appreciate that as always...I suggest a 40psi Hobbs switch in the line that feeds the nozzle. A simple t fitting will make this happen.
NO(normally open) _/_ Hobbs switch gets ground to one pin and the other goes to pe1 or PAO on the board (will need to check for ms2) this is an hardware input trigger to the ecu. So when the Hobbs switch sees 40psi in the meth line it sends a signal to the ecu saying we have spray action this is linked to the table switch function.
No pressure no table switching, this covers you if the pump doesn't work or the fuse blows or your just out of fluid.
This is failsafe.
But I am not gonna go quite so anal on that. Considering that they ( Snow performance) only include their little mini-map adjustable boost switch, and the unit has a low level warning light, the fact that I'm tying it into my ecu, and setting several conditions that enable operation of the thing, and watching that low level light,.....I'm well ahead.
It's supposed to maintain pressure in the line I'm guessing? Once tested? I understand that you want the Hobbs switch as a fail safe so that the line is pressurized before the water starts flowing, but At 200 psi line pressure, water-meth flow is gonna be pretty much instant as it is.
I know that I can remove the ECU.....I. Know that I can tie in an input from the low level switch light that starts cutting spark, or boost duty, or switches to a N/A version of the table or all three..maybe one day I'll do that.
But I'm lazy. I don't wanna take the damn thing apart again.