MY old S13 SR with a built head and a half dead T25 turbo made 260 hp and 260 tq at 15lbs boost. My turbo died 3 days later. Then I put another T25 that actually lasted and left the boost controller settings alone and it was boosting to 18-19 lbs. stock. and peak boost was 21-22. Wonder what that would make. I also had HKS 272/272 cams. Ivan tuned it. It was fully gutted, so Z06's saw my rear on with a T25. You can get 280-320 from a T28. If you make less than 280 let someone else tune it.