I have a 178 crank pulley on my car now. I stacked the Code3 with it and had to remove it because of the AFR being KABOOM lean. Then being who I am, I added the Pierburg 55 pump and put the Code3 on again. It was still lean, around 13 AFR at the top of 3rd gear, but I ran it at the track anyway. I can tell you that from red light to red light, stacked is amazing fun. At the 1/4 mile the difference was less than .1 and an over boost cell. A whole lot of risk for almost nothing. If you insist on running stacked, I believe after adding the 550 cc injectors and getting the tune right you might pick up a few more tenths. I have an aversion to new tunes. It usually takes several unless you can take your car to be tuned on a dyno by someone who's good at tuning. E/C doesn't have a shop in my neck of the woods.

Les