Hello all. I?m about to retune my 03 C5 with a 447ci in it . It has not be touched since 2007 ,regarding the tune. I?m sure many parameters have changed since 07 and a lot more things have been brought the table. I?m very mechanical and tech savvy for the most part. I?m semi familiar with the tables you can tune( fuel ,air etc ). I would like to know where would be a good starting point on the retune . Car was running 13.9 or a 14.0 on the AFR before I took it apart . Idle is rough when it?s cold and a little bit of other little things here and there . I?m fairly and very sure there?s a lot on the table for this car .. car got walked pretty bad by A C6Z with 10whp more than me.
Any and all advice is welcome. I?m new to the game and any input is better than no input.
Thanks