If it helps at all, back when I was stock turbo, fbo+inlets running e50 on a stock lpfp, the virtual dyno put me a little over 470 awhp (and auto). I was targeting 22 psi and tapering to 17. My fuel pump was maxed out both hpfp and lpfp and I would peak 25 psi between shifts (probably what killed my turbos). But it's a damn good time, but like everyone else has said, fbo, inlets and a little e85 should net you close. You'll just be making your turbos.
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