So I am looking into building up my d series for more boost than a stock map sensor will let me run... so... a gm 3 bar map will allow me 2 bar over atmospheric pressure right? so if i were to use hotrex's block filing method, and got some H beams with some 8:1 or 8.5:1 pistons what do you think i could safely push the motor to? PSI and HP wise and if i went with rods, pistons, and block filing whats the next weakest link? edit: what size turbo would be good? and what size injectors?