Yea this is funny
the before dyno was also in 60 degree weather in FL winter and the after was during a FL summer
I'm on 6psi with the mods in my sig and my car made 416hp.My next set of mods for my cobra is imrc deletes and longtubes. I seriously think there is something wrong with my imrc's because I dynoed 370hp and 300 torque on 6psi or atleast I hope something is wrong with them ,im trying to bust 400hp on 6lbs. My motor has 120,000 miles on it but has been rebuilt and still has imrcs chances are they are screwed.