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Discussion Starter · #1 ·
I know the advertised max boost is 20psi, but I'm getting nowhere near that. I'm getting around 13-14psi.. My friend also has a 10th Gen Si and he gets all 20psi at 5000-5700 rpm. At 5700 rpm I get 14 and a very slight hint of 15psi. Any suggestions? Please help me try to understand why I'm missing 5-7psi.
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