Just to give you something to gauge off of a had a 14b on my y8 ( 140k miles ) boosting 6-8 lb’s totally stock 2.5 inch exhaust I hit 186 on a mustang dyno with a conservative tune dsm 450’s and p28 on crome…higher boost and a little more tuning I could have hit 200+
I would assume somewhere around 8-15. BUT, psi is an erratic value. Meaning someone may hit 250hp @ 10 psi with a good tune, while someone w/o proper tuning would need more like 15ish. They say it's usualy 12 hp per pound of boost. 10 psi =120hp. 120+125= 245ish....this is all ballpark.