Automotive modification

For campro ecu , you can advance the ingition timing even below 2k rpm . Just you can't over advance and cause knocking . Campro got knock sensor attached at the block . Any knocking occur , ecu will get know knocking level thru knock sensor and retard timing . If over advance timing with piggyback , ecu will retard the ignition until it limit. Up to that , engine will lose power . And that will be just like you all called readapt , retune and overwrite . Ecu not that smart to over write piggyback if no engine faulty cause by the overtune with piggyback . Why campro engine can feel heavy during day time and feel power during nite time ... During day time , air temperature is higher than night time . Air temperature can be measured with campro map sensor . If air temperature in intake manifold rising , ecu will retard timing to prevent knocking . Because hot air will cause the mixture to burn too fast ( explosion ) before piston travel more than 40 degree before TDC . If mixture ignite too early with hot air , mixture will burn very fast and become a huge pressure which also called as explosion . Hence the piston will knock with explosion ... That is so called knocking . If want to have timing advance safe and no knocking happen during day time . A very good cool air intake needed to reduce air temperature . Conseal airbox with open pod if the best ... Not those open pod that expose to open air . This kind of setup sure cause ecu to retard timing during day time driving .