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Did you do a baseline run before mods? Besides the blower, what else was done to the car? Headers, intake...anything?
Nope, since I kinda rushed them, and they were doing lots of stuff (Z06 exhaust install, MGW shifter w/ "Man switch," and fixing my radar detector mount) in only 4 days. But I am assuming the typical 380RWHP stock.
Only relevant mod would be Z06 exhaust manis, downpipes, and H-pipes w/ stock GS NPP. Andy, and other tuners, have told me it is a worthwhile mod. We'll call it 1/2 headers. Of course the 3.6" pulley could be considered a mod.