Greetings,

I have been lately interested in stepping up in size to a 2017 or 2018 S6, coming from a 2016 S4. I am curious as to what level of modification/tuning would be needed for the S6 in order to get it roughly in line (that is, predominantly performance in a straight line as I do not track my car) with what I presently have with APR Stage 2 dual-pulley (93 oct. file) and their TCU tune on my S4.

Looking through quarter-mile spreadsheets/tables seems to suggest quite a fair amount is needed to meet the challenge the extra 400 pounds adds, when comparing 1/8 and 1/4 ETs. I’d be intrigued to hear any feedback from recent or former converts who went from tuned S4 to the S6 and what they thought of it. Ideally I'd like to not go past software and light bolt-ons.

Thank you for any insight you all may have. My apologies if this has been discussed before, but I would certainly appreciate any current words on the subject.