Originally Posted by fastblueufo
344hp with that turbo on a Mustang dyno is pretty good. Average hp for that turbo on 93 octane at that boost level is around 330.
I would tend to agree. That's near the upper 300's on a dynojet, which is pretty good for a pump gas tune on 21psi. Def. get that lean issue sorted out however, or you'll be shopping for a new bottom end.