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<blockquote data-quote="HMS" data-source="post: 180870" data-attributes="member: 1760"><p>Deep,</p><p>Terror lar the person done the o2 for you. I tried disconnecting the 2nd o2, the CEL still light up. I oso know the function is just to tell you that your cat is not working nothing more. The 1st o2 is to determine the A/F ratio.</p><p></p><p>Usually crack on the welded area lor. The first sign occur long ago lor....got welded for 4 times liao. I think if keep cracking like this, one day sure putus two pieces. :( </p><p></p><p>Filter:</p><p>As I mention lor, got better pick up respond only with open pod + nice sound :P </p><p>that i think translate to torque a little better. But at high rpm about 4500rpm, respond not so good in 4th gear cos climbing to 200kmh a little slower compare with stock. But from 0-170kmh, get better respond. Stock from 140-170kmh slower but steady can reach 200kmh np.</p><p></p><p>OBD-II ECU will determine the 14.7:1 A/F ratio to conforms to the emission standard. This mean that if we could optimise the flow of air into the TB, then we will get optimal A/F efficiency. That's y no additional WHP...hahaha. Maybe you should try Microtech instead ler, then go dyno again. But when I gauge the fuel consumption, the open pod is more efficient compare with stock standard. I dunno ler....cos I did the open pod together with custom CAI mah.....maybe could be the CAI give the engine more efficient power delivery. I remove the whole unit standard box filter and put a hose from the front fog light hole up to the TB rubber hose (where the open pod located). Then make a cover to prevent hot air front radiator fan coming in.</p><p></p><p>In Hyundai forum ( <a href="http://www.hyundaiperformance.com" target="_blank">www.hyundaiperformance.com</a> ) last time got a thread about air intake and extractor issue which they tested and say that mod the filter get more gains from modding the extractor bcos of the design of this engine, standard air intake is inefficient bcos got to meet the US standards on emissions.</p></blockquote><p></p>
[QUOTE="HMS, post: 180870, member: 1760"] Deep, Terror lar the person done the o2 for you. I tried disconnecting the 2nd o2, the CEL still light up. I oso know the function is just to tell you that your cat is not working nothing more. The 1st o2 is to determine the A/F ratio. Usually crack on the welded area lor. The first sign occur long ago lor....got welded for 4 times liao. I think if keep cracking like this, one day sure putus two pieces. :( Filter: As I mention lor, got better pick up respond only with open pod + nice sound :P that i think translate to torque a little better. But at high rpm about 4500rpm, respond not so good in 4th gear cos climbing to 200kmh a little slower compare with stock. But from 0-170kmh, get better respond. Stock from 140-170kmh slower but steady can reach 200kmh np. OBD-II ECU will determine the 14.7:1 A/F ratio to conforms to the emission standard. This mean that if we could optimise the flow of air into the TB, then we will get optimal A/F efficiency. That's y no additional WHP...hahaha. Maybe you should try Microtech instead ler, then go dyno again. But when I gauge the fuel consumption, the open pod is more efficient compare with stock standard. I dunno ler....cos I did the open pod together with custom CAI mah.....maybe could be the CAI give the engine more efficient power delivery. I remove the whole unit standard box filter and put a hose from the front fog light hole up to the TB rubber hose (where the open pod located). Then make a cover to prevent hot air front radiator fan coming in. In Hyundai forum ( [url]www.hyundaiperformance.com[/url] ) last time got a thread about air intake and extractor issue which they tested and say that mod the filter get more gains from modding the extractor bcos of the design of this engine, standard air intake is inefficient bcos got to meet the US standards on emissions. [/QUOTE]
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