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Programmable ECU on 20V
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<blockquote data-quote="Useless" data-source="post: 1217562" data-attributes="member: 670"><p>fandango,</p><p></p><p>sorry my bad. it should be "advantage" and not disadvantage as stated earlier :P surfing zth during office hours is a risky affair. haha. pls dont mind my typos.</p><p></p><p>due to the coding of ecus used on newer cars, we are faced with a tighter tolerance for emission output during close and also open loop operating conditions. hence there are some piggybacks out there that can manipulate the feedback o2 signal to the ecu. to my understanding, the lambda curve (narrow band) has a strong position at lambda=1, but these piggybacks can shift the position to lambda=0.9 for example; so now the car close loop operation can be at 0.9 instead of 1. this is to cater for modern cars which try to maintain a very huge close loop window for virtually all engine operating conditions. however, there are limitations to those who want to tune the lambda.</p><p></p><p>the narrowband is surprisingly sufficient if u plan to run mild mods. coupled with a egt sensor+gauge it is good enough to counter check the readings.</p><p></p><p>but do take note of how each manufacturer code their ecus. different makes react differently when a piggyback is employed. </p><p></p><p>just my poor 2 cents,</p><p>useless</p></blockquote><p></p>
[QUOTE="Useless, post: 1217562, member: 670"] fandango, sorry my bad. it should be "advantage" and not disadvantage as stated earlier :P surfing zth during office hours is a risky affair. haha. pls dont mind my typos. due to the coding of ecus used on newer cars, we are faced with a tighter tolerance for emission output during close and also open loop operating conditions. hence there are some piggybacks out there that can manipulate the feedback o2 signal to the ecu. to my understanding, the lambda curve (narrow band) has a strong position at lambda=1, but these piggybacks can shift the position to lambda=0.9 for example; so now the car close loop operation can be at 0.9 instead of 1. this is to cater for modern cars which try to maintain a very huge close loop window for virtually all engine operating conditions. however, there are limitations to those who want to tune the lambda. the narrowband is surprisingly sufficient if u plan to run mild mods. coupled with a egt sensor+gauge it is good enough to counter check the readings. but do take note of how each manufacturer code their ecus. different makes react differently when a piggyback is employed. just my poor 2 cents, useless [/QUOTE]
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Programmable ECU on 20V
