On ACN fuels with the drive map you can probably expect a ~30whp/50wtq bump in power. If you start mixing in e85 you can start more agressive mapping. With e85 on sport you can expect ~10whp on top of that and aggressive is another ~10.
You can try running Sport with the ACN 91 but i haven't seen many(if any) datalogs that looked really good on anything than the Drive map.
VNeBLOB has a ton of experience with this exact situation and i'm sure he'll chime in and give you his finding.
"I'm not surprised you get along well with all the other neighbours. If you put fifty children with Down's syndrome in a room there is going to be a lot of hugging." David Thorne