engine problems and turbo problems

[mattspyder]

hey guys, i got a couple questions, i got a stock turbo on my 99 gst spyder with greddy IC and greddy blow off valve, when i step on the gas i hear a hissing sound thats louder than should be, kinda like all the preasure is leaking somewhere, on my blow off valve my adjuster screw is stripped and it wiggles around alittle bit, think that could be it, another question is when i start my car up in the morning my oil preasure goes to normal but then after my car warms up the preasure goes down past the half way marker LIKE ALMOST TO THE BOTTOM, and when im driving fast its up by the HIGH part, what the hell is going someone help me out, and what kinda turbo should i get next for my car im going to upgrade pretty soon so give me some tips. thanks
matt

 

[InjenTalon96]

ur hissing problem is def from that, i stripped mine before and wow, it was pretty loud, and the oil pressure, theres a wire that goes to ur sending unit that could become loose and makes a horrible connection, check that out