what rechip cant do compare to piggyback??
rechip you just map on you eprom chip and put into you ecu. next time you "feel racer" change to another style need to change the map on eprom chip (can erase map and put new map),functional depend on you tuner and software to map oso depend on you ECU model. RECHIP only manipulated you ECU.
pigy back u need to know piggy back just received ur signal sensor and modified them to trick you ecu. but its more user friendly tkn2 sja.
for me based on you budget and you perfomance part... "chip oso chep"
one more thing x ramai yg pandai map data untuk chip nie.
i also hear from another tuner chip can disable many function on you stock ECU like O2,knock sensor,VSS (for vtec),coolant temp,close loop and many more seting for stock ecu u can disable it.
jus my 2cent maybe their eprom chip just manipulated ecu only.
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Therefore in Stock Car, the ignition, injection, boost, - etc. patterns programmed, are on the "safe side". In another word, too conservative. "