I currently use a JDM sr20 and run all of the pulsar turbo components. I see anything beyond 10psi of boost leaving the "safe" zone with that setup. The US MAF and 370cc injectors have been none to run out at about 12 psi.
Also, do you know if you have the JDM 10:1 compression engine (did it come with a tubular header?) Because they many of the JDM motors are also 9.5:1 compression like the US motors. I woud remain conservative with the boost if you do indeed have the 10:1 motor.
For the ECU, there is no reason to pursue any method other than Jim wolf Technology... Also, since we use a MAF sensor you dont want to blow off air into the atmosphere. Instead, re-route it back into the intake. If you look at mine, it's not done like this but thats me
