15-17psi on HKS Fcon
 

Sup fellas. So I have been driving my turbo FC at 5psi for almost a year now. Motor is healthy at 110psi on all rotors. Its a S4, supposed to be street port but idk how agressive. Well I slapped on my knights ports hybrid turbo, greddy top mount, 3in catless exhaust. Aluminum intake pipe, similar shape to stock. And running a hks Fcon the older kind with stock injectors. So I started messing with boost by adding spacers between the turbo and actuator. Managed to go from 4.5ish psi to 9psi. Ran much better, wideband shows 10.5 at full boost near red line. So I dicided to grab my vice grips and fold out the actuator bracket a bit out and did 15 at full bust and light boost creep to 16.5-17psi. car ran beautiful at 11.7 AFR at full boost near red line. Did a few pulled and adjusted it to 12psi. So how bad is it to have it back to what it was? So I have to adjust my crank angle sensor or something? Do I really need to run bigger injectors. Car felt awesome, no backfire or anything just my usual 10.7-11.3 AFR on idle lol. Keep in mind I'm running all 4 550cc. I just don't want to blow anytime soon. Till I get another car to daily

Here is a video I posted on Instagram, it's blurry but you can see when it hits 17 psi and holds at 15psi. Held good at 10.5 all the way to 6k rpm and almost at 7krpm it leans to 11.3ish https