Hiya.. those bros out there who has a piggy back ECU - let's share your experiences.
My own - I have a Buddy Club Racing Spec B piggy back - features :
(1) control air/fuel mix
(2) control auto trans shift
Results (with proper dyno tuning and computerised adjustment of air/fuel mix) :
(1) On crank HP improve from stock 110bhp to 125bhp
(2) On crank torque gains cross the board of >10%
(3) No increase in petrol consumption in spite of improved performance