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It's possible that it's tune to 22 psi at 4th gear, around 4 - 6k rpm. Then it's probably taper down near the redline. It's an aggrasive set up. I don't think it will make that much more power at that psi. I think anything behind 20 psi is out of turbo efficiency range on vf series.
Still 330whp/360tq on mustang dyno? It's hard for me to believe that. Maybe on dynojet. Also, is that on the pump gas?
I still hang out with subie crew. I've been to several subie dyno day meets, and they have mustang dyno.
From what I have seen, most sti with FBO and stock turbo was making 280-300 whp and 310-330tq.
If your friend's WRX is acutally making that much power with FBO, and stock turbo and pump gas, it's hell of car. Personally, I think your friend is trying to brag, and bring some numbers up.
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