question5: my workmate owes a RB25DET in the R32GTS, and also having a SR20DET 180SX, do u think my EGbreezeEG3 with b18cnonR can beat up the straight line???

generally the other cars will be quicker
depends on your mods and theirs
but power to weight will have u in front with all having basic mods
IMO and my experience
turbo cars heat up easy on the track too
so after a couple of laps ...it will be another story