2 Questions: Dyno & Diff. ratios
#1 - ref dyno tuning a basically stock LS1, except for unrestrictive mufflers (SLP Loudmouths) and BlackWing air intake. Is it worth the money and approx. what gains can I expect??
#2 - I have an '04 A4 w/ 2.73's - what ratio can I go higher w/o changing differentials. IF I wanna go to like around 3.42's, I understand a change in differentials is needed ...... approx. cost on all parts and labor?
Thanks very much
@. as far as I know you can't plug in another set of gears in you diff.
Z06 3.42 , new, about $1000 used $300 - $400. Labor maybe $250.





