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I do not know of any other mods. I didnt know of the tune until I saw 1 bar. I have not done any work to the car at all. I just purchased it a couple days back. It sounds like I may have a boost leak from all the reading I have done, making test plugs now!
I am a proud new owner of a 04 996tt. It has 36k, and runs great, except for the lag. It hits 1.0 bar, so I suspect a tune. It takes about 2 seconds to build boost, and 2 second lag between shifts. The lag feels like a bog, could this be a wastegate issue? I come from the supercharger world, relatively new to turbos, but how much lag is normal? Thanks!