i need to get my car tuned.for example i raced a buddys E36 M3 with one person in the car with me and was full throttle and was side by side.did it again with 2 people in the car and was half to three quarters throttle and walked him.is this because of the rich mixture after turning up the boost on the stock ECU.i thinking about a Apex super AFC 2 or a Neo the AFC has a DEC air setting for open BOV stalling that i need.i was 12 PSI first race,13 second not a big difference.

hks SSQ ,front mount ,walboro,hks adjustable wastegate.3 inch turbo back,koyo radiator a flex a lite fan.