Betting Adj. for 2-1 BJ w/ ace side count

Using a system that employs an ace side count for betting purposes, does anyone have a feel for how this should be adjusted if blackjack pays 2-1. For example, with AOII, one adjusts the running count +/-2 for betting purposes if a dealt quarter deck is rich or short an ace. I was wondering if maybe this should be more like +3/-2 if a blackjack pays 2-1. Has anyone looked at this before?