if your sticking with the ca18det you need too get a bigger turbo id suggest getting like a t25 or t28 turbo made for the sr20det im pretty sure it will bolt on.
You will however have to clock the compressor housing in order to allow the water return line enought clearance. otherwise it will hit the top of the manifold.
and also don’t boost over 14psi on the t25 turbo and never boost more than 14psi without some sort of fuel management, including larger injectors, period. cause your motor will be FARKED