I've got a buddy on auto turbos and he can hold 15 all the way to redline. He's single pop pretty sure, and 3" exhaust. The single pop makes a much bigger difference than the exhaust.
"Capitalization is the difference between helping your Uncle Jack off a horse, and helping your uncle jack off a horse." "'she' also likes to swap since I think I am going to need to give her to woody again." - Dvlhntr "full alphabetic boost mode" - ChristopherTheOne " Purrs like a sexually satisfied black panther." - BigTDogg "Two oil eating, angry, spinning triangles of death." - turtleboy on rotary engines