I have an EG hatch with a JDM B20 and I just put in Crane cams and I don't know if there is any break in period. When I first started the car I let it idle for about 15 mins at 1500 RPMs and put about 4 city miles and 25 highway miles on it. I am not sure if that is enough to start beating on it cause I wanna go to the track soon. Stage 1 in anyone ask.