Check this out.. After installing an MBC on my '88 TII, I went to test drive the car and actually hit 15+psi (autometer boost guage) a couple of times and this is before adjusting the controller. Anywayz, I pulled over to lower my boost only to find out that my engine was soaked w/ radiator fluid.! My radiator hose burst and sprayed coolant all over.. Good thing I was just a couple of blocks from my house and still managed to get home and changed the hose from the one in my '86 GXL. After a couple of minutes, I was back on the road but this time only boostin' about 10 psi.. I guess my point is: For those who are new to raising your boost w/ contollers like myself, be aware or you might suffer the same fate or even worst than I had...!!
Happy boostin'.......!!!