Nah my homemade injection will be more complex than the ol' washer bottle jobs.

It will have a 70PSI pump and a few pressure switches (plus a controller than when you run out of water it will have boost cut to prevent pinging). Firstly, the pre-stage at around 5psi will turn the pump on and then at around 8 psi the solenoid will open allowing the anti-detonant to flow through a circuit with a rising rate fuel pressure regulator, needle valve and a injector nozzle.

The idea is that the preliminary pressure will be greater than boost (enough to properly mist the mixture) then as boost pressure increases so will the pressure to the nozzle via the RRFPR and then I can control the flow with the needle valve.

This is working on the fact that as boost pressure increases so does the charge air temp and thus the likely hood to knock. So by setting the needle valve to have sufficient flow at the beginning to prevent knock, the RRFPR will increase this flow in accordance to boost (I'm pretty sure its a linear relationship, if not; Ill put in a bit too much anti detonant at the start and then will end up with enough when on boost).