but fyi.. last time i only use reprogramable ecu for my wira 1.6 perform better then previous.. without any mod to my engine... but this ecu are being told to test from my mech..
higher rpm seam more lighter n rpm rev cut being increase to 9k so i can reach 110kkm/h just only for 2nd gear (this for cornering purpose n 0-100 timing) but only for 4g92p sohc lol.. other engines i dunno..

for me e-manage only can gain something if there is modification on ur engine.. but if u hv in mind a lot of upgrade in future time, yes indeed e-manage is required...
but for those who's alwz rev high like me, i keep it standard part as much as i could, can last longer i presume with small budget..
coz i not that rich meh.. hehe