I'm pretty much in the dark here, where would a good place be to start tuning IGN timing for a 400whp setup? I know there are more variables, but it's just a stock cam/cam gear gte w/ an e-manage, and a 57trim + fuel upgrades. What I'm seeing is that an additional ~4 degrees of retard is unaccounted for due to AFM signal adjustment (15%). But I have no clue how much to advance timing for an additional ~40% VE that is unaccounted for by the stock ECU