Once I put my h/c/i project in.. Will I really need a tuner to be able to drive it? like a tweecer? Is there a way I can just set the timing and fuel pressure?
Depending on the combo you go with, you may not need a tune to drive it. However, I would still highly recommend tuning any modified car.
My car drove almost just as smooth as a stock car with no tune. I can even putt around under 1500rpms with practically no bucking, and it idles perfectly.