I recon you prob got more around 160bhp at wheels. get a big intercooler and uprated turbo and then get it set up by a pro... You got preety much same set up as me apart from cooler and ally rad mine is about that with 10psi.
Always intercoolers in for sale adds. you cnt get a second hand pace double capacity for about 70 posted
As I think if you want to start hitting the 200+ mark you wanna start saving some pennies. remember these are any 135bhp aprox stadard but in there prime that was pretty nippy.
What PSi is the turbo pushing?