Just wow. Be careful who tunes your car.

https://www.youtube.com/live/ZsR_aD6...vqz9tQEeoMUsTl

Just watch after the 7min mark and then maybe 10 min is all you need.

Quick rundown.
CT5-V Blackwing
416cu build, ported heads, cam, xport stock blower max effort
Port injected but tuner turned it off (said had too much fuel)
Made customer install wbo2 when gen5 have stock widebands
E85 in tank, no flex sensor, stoich targeted for gas, virtual flex enabled
VE table not tuned
Positive 33% LTFTs (tuner said LTFTs dont matter on global b, only STFTs matter)
.92 lambda or 13.5afr @ 18psi, PE target is .86
17.5* timing and added 5* timing to flex tables even though ecu can't read e85 to add timing
Locked transmission timing pull to 7* so ecu can't pull timing between shifts

I can help you

Ouch.

lol

Lots of people out there doing it for a living who are totally unqualified.

Some people just make it up as they go. Injector data can be adjusted to suit your needs, stoich of a given fuel doesnt matter, fuel pressure doesnt matter, 25* makes the best power on every ls. Still seeing local tooners pick up 30hp from e85 from stock/bolton/cam ls3s. They do charge a e85 tax.