Update: 420/380 on 26psi tune. Ragging on my car pretty hard to see what pops this stock motor. No breakage yet after 12k miles daily driven. Full boost several times a day, 1/8 runs, 1/4 runs, highway pulls, thrown several codes sorting out minor issues, and driven in all conditions including crushed gravel daily.
Even hammered it for a few miles to see how high my EGT would get. Pegged to 1800F with no ill effects, usually pulls got to 1600-1700 in a second or two then flatlined. Should really drop off the spare motor to the machinist so its ready when I succeed