Old school project

[Cool guy levi]

Ok im new to the forum so bear with me i bought an aquamist Dds3 v8 on craigslist and i got it all wired up and installed. But let me back up here my vehicle is a 1993 dodge ram 4x4 with a 2001 dodge v10 engine im in the process of turbocharging it and therefore i need to run meth. So my questions are; i dont want to inject meth untill 1 psi then slowly progress to full injection at 8 psi, do i hook it up to a pressure switch? Will any pressure switch work? How do i trigger the injection? Does the pump run when the engine is even though its not injecting? What do i do? Please and thanks for any help in advanced!