Hi I'm wondering could help me out please. I'm in the middle building a engine for racing in 1400cc class.. Im using d14 engine block with d15b2 non vtec head . I have stripped down down a d14 a2 engine and the piston has slight dish . I also stripped down a d14 z2 it has flat piston . But also have d16 z6 set of pistons but there is a bigger dish on them I figured out the d16 pistion fits the d14 block . But I'm not so sure which piston is better flat or dished . Any help would appreciated