I am at 4500ft. Air up here is thin. My buddy did 340whp on 18 or 20 psi in his srt4 with a 57 trim t3/t4 with a .63ar housing. But there are guys with DETs with gt2871r turbos around here that don't even pass 350whp on 18psi. Even with .86ar housings.
Plus the dyno around here reads about 15whp less than a dynojet, it is a Dynomite dyno. Their numbers are similar to mustang dynos.
Plus the dyno around here reads about 15whp less than a dynojet, it is a Dynomite dyno. Their numbers are similar to mustang dynos.