Guest xerverkillah Posted May 19, 2009 Share Posted May 19, 2009 Hi all recently Ive installed some extractors, have cat back exhaust and pod filter after my extractors were installed i immediately felt the performance increase. much more torque and revvy as well as the exhaust note. but after about a week of driving now it feels like its gone back to its original performance. same with the note of exhaust. im assuming its the computer adjusting itself? or is there something wrong? Quote Link to comment Share on other sites More sharing options...
pedrosixfour Posted May 19, 2009 Share Posted May 19, 2009 Are you sure its not just a question of you getting used to the changes?? I think this is, you will find, why modifying becomes a bit of an addiction in most petrolheads! Quote Link to comment Share on other sites More sharing options...
bigbloodyturbo Posted May 19, 2009 Share Posted May 19, 2009 In my old honda when you changed the exhaust with a freeflow job with decats and put a filter on it the performance would improve but after a few hours driving it went back to normal and actually felt quite sluggish. It was the OBDII ecu cancelling out the improved flow through the engine, the solution was to recet the ecu every couple of days or convert to OBDI. I eventually went for hondata. Quote Link to comment Share on other sites More sharing options...
Guest xerverkillah Posted May 20, 2009 Share Posted May 20, 2009 Are you sure its not just a question of you getting used to the changes?? I think this is, you will find, why modifying becomes a bit of an addiction in most petrolheads! haha i kept telling myself that it was just me getting used to the changes. but im sure its not just me. i can definately feel the difference. ill try resetting the ecu as bigbloodyturbo suggested. its moving the 2 "30" fuses yah? Quote Link to comment Share on other sites More sharing options...
Guest xerverkillah Posted May 21, 2009 Share Posted May 21, 2009 k. so i reset the ecu. felt like i got a very small improvement but could be just me. not the same as it was immediately after install Quote Link to comment Share on other sites More sharing options...
Guigsy Posted May 21, 2009 Share Posted May 21, 2009 extractors? Quote Link to comment Share on other sites More sharing options...
Guest xerverkillah Posted May 21, 2009 Share Posted May 21, 2009 extractors? huh? Quote Link to comment Share on other sites More sharing options...
Guigsy Posted May 21, 2009 Share Posted May 21, 2009 do you mean catalysts? i guess they call them something different in australia Quote Link to comment Share on other sites More sharing options...
Guest xerverkillah Posted May 21, 2009 Share Posted May 21, 2009 do you mean catalysts? i guess they call them something different in australia no i mean headers. i had aftermarket headers installed. Quote Link to comment Share on other sites More sharing options...
Kranz Posted May 21, 2009 Share Posted May 21, 2009 He means tuned length tubular exhaust manifold Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted May 21, 2009 Share Posted May 21, 2009 So he has an N/A then, not really going to notice much of a change then. Quote Link to comment Share on other sites More sharing options...
Alex Posted May 21, 2009 Share Posted May 21, 2009 The engine is p155ed off that you took away the stock air box and fitted something that forces it to injest hot air... Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted May 21, 2009 Share Posted May 21, 2009 You need a user mappable ecu to get the best gains from N/A engine mods. Without spending a fortune you won't see any big gains. The engine is cam duration and lift limited and compression limited. To get say a 100 BHP increase you'll be spending more than the whole car's worth on getting there. A turbo engine is going to be a FAR more cost effective way to big power gains. A tuned N/A will fail emissions and be a pig to drive with a narrow power band and limited torque, especially in a huge heavy car like a MKIV. Quote Link to comment Share on other sites More sharing options...
Guest xerverkillah Posted May 21, 2009 Share Posted May 21, 2009 The engine is p155ed off that you took away the stock air box and fitted something that forces it to injest hot air... actually i have the pod boxed off with a cai from my front bar Quote Link to comment Share on other sites More sharing options...
Guest xerverkillah Posted May 21, 2009 Share Posted May 21, 2009 So he has an N/A then, not really going to notice much of a change then. out of all the small mods ive done this was the most noticable. yea its not a big change but its a decent one. since im na im limited in mods without spending large amounts of money. thats until i swap over to a tt Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted May 21, 2009 Share Posted May 21, 2009 out of all the small mods ive done this was the most noticable. yea its not a big change but its a decent one. since im na im limited in mods without spending large amounts of money. thats until i swap over to a tt In answer to you're earlier question, the ECU is not self learning, on the TT it will just switch to a different part of the map when seeing more boost, much the same with the N/A, IE slightly more air flow, you may have more response by fitting something like an emanage. Quote Link to comment Share on other sites More sharing options...
Guest xerverkillah Posted May 22, 2009 Share Posted May 22, 2009 In answer to you're earlier question, the ECU is not self learning, on the TT it will just switch to a different part of the map when seeing more boost, much the same with the N/A, IE slightly more air flow, you may have more response by fitting something like an emanage. really? ive always been told it was self learning. have also been considering getting a apexi safc II or neo but have been told I wouldnt see much gains to justify the cost of buying it and getting it tuned. Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted May 22, 2009 Share Posted May 22, 2009 really? ive always been told it was self learning. have also been considering getting a apexi safc II or neo but have been told I wouldnt see much gains to justify the cost of buying it and getting it tuned. A lot of people seem to think it is, but all it can do is respond to more boost/airflow by adjusting to another part of a pre set map, True self learning ECU s have only been around in the last few years. A Neo or similar will help, but with N/As there is not a lot to be gained anywhere in particular, i guess the most noticeable mod would be cams, but it will make the power band a lot narrower, its very expensive to tune N/As. Quote Link to comment Share on other sites More sharing options...
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