Well, I know that the Kia racing team pushes the 2.0 to about 22-24psi.
After reading much if the research from a fee of the other guys moding the Stinger, I can't believe that the 3.3 won't handle 20+psi. Many companies push over 20psi from the factory (WRX STI, Evolution, Alfa Giulia).
There's just so much untapped potential in this drive train! LOL
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