use the Smarty levels 4,6,8 depending on how aggressive you want the low end power. even levels do NOT add timing. i love the Smarty for checking/clearing codes, tire size adjustment, adjustability (level 1 timing only or half power allows me to use the cruise control on the highway!). it is a big gain in driveability even if it doesn't add to your dyno numbers. with your auto trans i think you'd like the Smarty, I get too much low end fuel on my manual with 130hp sticks. just my $0. 02!