Sean reckons if I had aftermarket headers, would allow more timing to around the 330mark with same psi. Trying 23psi today didn't make much more torque/hp so wasn't worth the heat/stress on the engine.

Next is the E85 tune in 2 weeks, Sean reckons as is will see 360+ easy...woohoo!

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06 STi: 337hp @23psi on E85...
06 STi: 309hp @22psi on 98ron...