DIfferent model Sdi injectors???

HI everybody,so here is my case. First time when i got Sdi's my car runs very well and most important when i mount injectors the turbo boost goes to 19 psi itself. I did not touch anything.Then i mount my stock injectors and boost go to 15 psi stock. So later i bought second kit of Sdi-s and a car runs little bit less then first time ,specialy on 4,5 gear.And most importatn the turbo boost keep at same 15 psi and i must change it to 19 psi myself. But even then i think first time car have been faster. I check injectors with specialist and they run very well. So Is it possible to have various models of Sdi's?

Thank you and sorry for bad english

I just remember that when i receive second kit,the big injector has only body,nothing there,so i call to scrapyard and they send me another injector,same model ,with 200 bar logo.So all of them is Sdi but not from one car

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