also depands on what model turbo as to to what standard boost it comes with.
15psi will keep u safe, if u get spikes everynow and then and hit cut a simple fix is to buy a little 1 way windscreen washer valve to stop the boost going through the solenoid causing the ecu to cut fuel/ignition. nick vk u bot there 2. just play round with your controller, im sure u will figure it out, i have no experience with the blitz type but most i have seen u set the duty cycle which is how much the boost solenoid opens and closes to control boost then drive it, see what level it reaches and keep adjusting from there.......