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BNR32_Coupe · 06-01-2009, 08:29 AM

My friend and I were having a discussion about a simple open air filter intake and exhaust setup. One argument was that the OEM ECU fuel/timing map is configured for the specific layout of the vehicles intake setup, therefore, an improvement in airflow efficiency would do more harm than good in WOT conditions, as the engine would be leaning out.

It just seems so farfetched to say an intake and exhaust setup would require an ECU retune/piggyback controller or else you're just leaning out your car. As far as I know, most ECU's can learn and adapt to changes in conditions, such as improved airflow, but obviously they wouldn't adapt to a more hardcore set up like increased intake piping diameter, cams, etc. Can anyone verify this or add some input?

06-01-2009, 08:29 AM	#1
BNR32_Coupe Banned By Establishment Join Date: Jun 2006 Location: Shaugnessy Posts: 2,610 Thanked 481 Times in 168 Posts Failed 730 Times in 91 Posts	ECU retune for Intake Exhaust setup My friend and I were having a discussion about a simple open air filter intake and exhaust setup. One argument was that the OEM ECU fuel/timing map is configured for the specific layout of the vehicles intake setup, therefore, an improvement in airflow efficiency would do more harm than good in WOT conditions, as the engine would be leaning out. It just seems so farfetched to say an intake and exhaust setup would require an ECU retune/piggyback controller or else you're just leaning out your car. As far as I know, most ECU's can learn and adapt to changes in conditions, such as improved airflow, but obviously they wouldn't adapt to a more hardcore set up like increased intake piping diameter, cams, etc. Can anyone verify this or add some input?