Could someone direct me in how you road tune A/F's on a Subaru motor that optimises A/F's for different octanes and boost when your in the 50% and above load zones. I understand the 10% to 50% spool the turbo A/F's and ST/LT trims etc. I also understand timing though load zones and max torque plus EGT's.
Let me explain some more.
If you have engine management ie Link, UTEC, Hydra etc and you start with a base MAP on a modified engine with say 9.0 compression that is 2.4 liters. The A/F's are a conservative 10.0.
What determines the optimum A/F's for octane, timing and boost on any Subaru turbo motor. What are the steps need to get there.
Most say on a WRX that 10.8 A/F's on 93 octane is OK. STI tuners I've talked with say you can have 11.2 A/F's to 5k and 11.6 A/F's from 5K up on 93.
I have seen maps built for 91 octane with 22 psi and maximum 10.5 A/F's for STI's.
I wish to build a track day(circuit reliable) tune.