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Title: Decat system and map on ME7xxx Post by: Alex95SW on December 30, 2014, 04:48:25 AM Hi everyone,
When a car is decat, and the section of the exhaust system for the decat to the end is bigger, what about the function like : - ATM - AK 1.20 Overview Emission reduction / catalyst at start - LAMBTS (with Critical exhaust temperature: TABGBTS = 900 °C) - LAMFAW Don't need to disable the LAMBDA fault code, just adapt the LAMFAW table, LAMBTS? So make test with wideband O2 sensor + EGT Am I right? Title: Re: Decat system and map on ME7xxx Post by: KmosK04 on December 30, 2014, 05:25:19 AM I don't understand what you want to do. You want to calibrate the fueling with bigger and decat exhaust or you want to kill the decat fault code?
Title: Re: Decat system and map on ME7xxx Post by: Alex95SW on December 30, 2014, 06:08:18 AM I want to calibrate the fueling with bigger exhaust system.
Title: Re: Decat system and map on ME7xxx Post by: KmosK04 on December 30, 2014, 06:11:38 AM Read here and the FR modules
http://s4wiki.com/wiki/Tuning#Open_loop_AFR Title: Re: Decat system and map on ME7xxx Post by: nyet on December 30, 2014, 12:40:03 PM I want to calibrate the fueling with bigger exhaust system. What does a "bigger" exhaust system have to do with fueling? Title: Re: Decat system and map on ME7xxx Post by: Alex95SW on December 31, 2014, 12:56:14 AM In my mind, and i think i'm wrong now, if the exhaust system is bigger the exhaust flow is more important. So to compensate the torque loss I need to calibrate fueling to inject more mixture. am I wrong?
as the exhaust gaz is more important, the EGT can be more or less, as the AFR. Right? Title: Re: Decat system and map on ME7xxx Post by: nyet on December 31, 2014, 12:03:07 PM if the exhaust system is bigger the exhaust flow is more important. So to compensate the torque loss I need to calibrate fueling to inject more mixture. am I wrong? Yes. If you are open loop, the MAF tells the ECU how much fuel to inject. If you are closed loop, the O2 sensors tell the ECU how much fuel to inject. Either way, any increased flow (from whatever mod) is reflected in the MAF readings, or the O2 sensor readings, respectively. Please consider reading up on EFI.. Quote as the exhaust gaz is more important, the EGT can be more or less, as the AFR. Right? I have no idea what you are trying to say here. |