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Hello- I have a 3.0 bar fuel reg, a swedish dynamics stage 4 red APC, everything else is stock except K&N filter. What level of boost should I expect? I can pull a very consistent 15psi, but I'd like to see more like 20psi. Before the swedish dynamics upgrade I was seeing about 10 to 12 psi. Any suggestions? Thanks!
 

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15psi sounds about right for what you have. There are lots of things that you can do to get more boost out of it. The first and most important would be bigger injectors and some way to manage them. After that the world opens up to bigger intercoolers, water injection, better exhaust, and the inevitable bigger turbo. The factory turbo can handle ~20 psi but after the magic 15 the "Quality" of the boost degrades, meaning after that the air is so hot its not really worth it. It will sill make some more power but there is a lot more to be had with a different turbo.


Yay another Malachite Turbo :D
 
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