my understanding is run the VCT, otherwise its will be just like a normal sr20de
VCT is variable control timing? so nissan v-tech
only s14/s15 motors came out with VCT
SR20de from the s15 AUTECH version is another one that is refine and factory tune to output more power, some say, that the SR20de Autech does 14.5 down 1/4mile and others, its as fast as the AUS spec s15, all we know is, its a dirty Nissan