71.4% under boost my turbo moves a lot of air and my hp was an estimated amount it was guestamated my a shop owner by riving in the car. there dyno was broke
here are some facts:
the amount of air moving through the motor dictates how much fuel the car uses
the amount of fuel the car uses represents how much power the car should be making if its tuned properly
the amount of power the car makes dicates the MPH at the track.
you cant have mph without power, and if you are making the power the MPH should always be there. MPH and power go hand and hand always.
therefore if your turbo is pushing a lot of air which you say it is, it would consume a lot of fuel, which allegedy it does(71% of 1000cc injectors is good for 400+whp), and if its consuming a lot of fuel then the car would make a lot of power since you dont have a dyno the only way to test this is at the track. your car traps 105mph that means it is in the 220whp range maybe even less.
somethings i would suggest looking at are the tune first and foremost. do you have a wideband on the car? if so what are your air fuel ratios looking like under boost? what engine management system are you using? what is your gas mileage like?