I got a one owner 08 G8GT a couple months ago with 67000 original miles. It has a CAI and muffler delete and that's it. I originally got a Diablosport i3 tuner but found it very limited on the tranny. I found that my son already had the HPTuner so we have been playing with it some. The biggest problem I am having is massive flare in 1-2 and 2-3 shifts at WOT. It runs right up to the rev limiter. It drives me crazy. I have turned off the DOD and done some small changes to the tranny but need some help from someone who has more experience with these than me. I have been doing some Harley fuel injection tuning but this car is something else. I wish I could just take the car and have everything done I want done but I am a disabled vet and living on a fixed government income sucks. I am just really happy to finally have the car though, after looking for 2 years. I hope that my tune posts here. If not, shoot me an email and tell me how to do it. Thanks.
Nick King