Here's the final result. I am bummed that I didn't get to see the final dyno pull. I am more bummed that the final result was the one I saw 4 days ago.
That was done around 4 p.m.
Temperature was around 75F and 60% Humidity
The boost leak was detected after ther Perrin TMIC and before the throttle body. They end up having to use an industrial T-bolt clamp to tighten it. My boost is 18.6 psi (3rd gear) but it reads 20.5 - 21.3 on the AP log. I was told that the gear ratio will affect the psi in a way that 4th and 5th gear will have higher boost (well, I don't get it, but that's what I was told)
I was very unhappy going home without an actual final dyno sheet with me, then I told myself to look beyond the numbers. I need to see how it actually drives. The Blitz intake is a lot louder than I expected. You cannot miss the spooling and it starts around 2500 rpm. It is so loud that it can replace the BOV - that saves me $295 (was going to get the COBB BPV). This can be controlled by going easy on the gas pedal.
The header did not change the exhaust note a bit. This is actually perfect because I did not want it any louder. I like the subtleness of the Perrin exhaust.
INJECTOR DUTY CYCLE:
After upgrading to 800cc injectors, my AP is telling me that I am running at 60% IDC compared to 100% before on my 550cc stock injectors.
I got the NGK 1 step colder spark plug. Whoever has aftermarket spark plugs, please tell me if you notice any difference to the idling sound. I am not sure if it is just my imagination, but when I have my hood opened and it's just idling, I can hear a more distinct ta.ta.ta.ta.ta.ta.ta.ta.ta.... (if it makes any sense)
At first I was surprised how little difference the 50 horses make to the power when I test drove it. I was looking for more of a kick. When I first got my WRX, I was very pleasantly surprised by how much kick it has once it reached 3000 rpm. After looking at the dyno graph, I realized that I should be looking at something different. The stock torque curve is the highest at around 3K rpm and tapers down. My new torque curve reached the pretune level about 500 rpm later (thanks to the biggest intake and inlet hose), but it peaks at 4700 rpm. When I really stepped on the gas, there are definitely more power in the higher rpm which I wasn't getting before. Also, the response is a lot quicker.
After watching the dyno pulls, I realized how quickly the bigger Perrin TMIC heats up and affects the performance. Although it allows the turbo to spool up about 500 rpm quicker than the FMIC, but the higher temperature in the engine bay really hurts the power. Is a carbon fiber hood with more vents going to help or it just creates more turbulence inside the engine bay?
Another weird thing is that after 25mile drive from the shop to home, I wanted to let the car idle for a while before turning it off, and all of a sudden, it was giving me a CEL (looks like it was in the limp mode). I quickly disconnected the battery and reset the ECU. The idling was rough for a while. I hesitated to do more testing and decided to take a dinner break. After the break, I started it up again and saw no CEL, so I went out for another test drive. It seemed fine after that run. Was my ECU trying to learn my new parts? Can't figure that one out. I am going to call the tuner tomorrow about this.