i have a 91 hatch with a b17a the bolt ons and a ys1 tranny that has the same gearing as a type r(i think it is a b16 tranny) and what i believe to be a gsr ecu my vtec does not kick in untill 5700-5800 rpms my friends ls vtec kicks in at 4900 what gives. my computer is not throwing a single code either