I know you were asking Mr. Pizza this, but you should install your stuff before doing the tuning. Are you doing a dyno tune or just a reflash? If you go to a place and they just reflash it, a lot of the times, they can test drive your car just to make sure there isn't anything noticeable like pinging or things of that nature. If you are using standard stuff that is normally used (ie. IHI turbo, STi injectors, Walboro fuel pump), everthing should be fine. If you use different stuff, their baseline maps may not be 'exactly' what you want and you may want to have your car custom tuned. Mr. Pizza will now speak and probably put something in there for me to go do something with myself or something since I butted in.

 

Oh, I thought you were putting in an aftermarket turbo? If you are leaving the stock turbo in, you don't need the injectors or fuel pump. You can use them on teh stock turbo, but I don't think you are going to really get anything out of it. Are you going to up the boost on the stock turbo? I feel stupid now. If you are leaving the stock turbo in, but putting in the new pump and injectors, you are just increasing the amount of fuel going into the motor without uping the amount of air going in. I mean, you could tune it so it will run just fine, but it just seems like a waste of money to me. I could be reading your message wrong and not getting what you're saying. If you are putting in a new turbo, then install everything and then get it tuned.

 

That is what I would do. Actually, I am sort of doing that. I can never afford everything at once and I don't live paycheck to paycheck, so I'm waiting on most of the stuff. So, I hear ya, just wait till you have everything.