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userpike
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« on: August 01, 2012, 06:40:45 PM »
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What would happen if I took a stock .bin file from say ME 7.5 and only changed LAMFA so that AFR is where I want it to be at certain rpms?
Will things richen up or lean out to what I want or would I have to play with actual fueling maps?
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RS4boost
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« Reply #1 on: August 02, 2012, 01:49:23 AM »
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What would happen if I took a stock .bin file from say ME 7.5 and only changed LAMFA so that AFR is where I want it to be at certain rpms?
Will things richen up or lean out to what I want or would I have to play with actual fueling maps?
If you only change LAMFA, the ECU will do run with this values until you reach TABGBTS. At this point the ECU runs with LAMBTS. If you want a richer AFR at high EGT and WOT, you need to change KFLBTS. |
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nyet
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« Reply #2 on: August 02, 2012, 08:02:48 AM »
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BTS will only win if it is richer, afaik
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ME7.1 tuning guideECUx PlotME7Sum checksumTrim heatmap toolPlease do not ask me for tunes. I'm here to help people make their own. Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your ex
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RS4boost
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« Reply #3 on: August 02, 2012, 09:26:50 AM »
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BTS will only win if it is richer, afaik
That`s right...  |
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userpike
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« Reply #4 on: August 04, 2012, 07:34:22 PM »
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If you only change LAMFA, the ECU will do run with this values until you reach TABGBTS.
At this point the ECU runs with LAMBTS.
If you want a richer AFR at high EGT and WOT, you need to change KFLBTS.
ok let me get this straight. The ECU runs with LAMFA until the threashold (TABGBTS = 399C which is stock temp setting for my ECU) is reached. Once EGT reaches this temperature, the ECU goes into "protection mode" and uses KFLBTS until the EGT temperature falls below TABGBTS again. But if you go WOT and the EGT is below the TABGBTS threashold, it uses LAMFA. correct? What is a safe TABGBTS temperature? I noticed on some of the 2.7t ECUs files the TABGBTS is set way higher than 399C. |
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silentbob
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« Reply #5 on: August 04, 2012, 11:40:26 PM »
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ok let me get this straight.
The ECU runs with LAMFA until the threashold (TABGBTS = 399C which is stock temp setting for my ECU) is reached. Once EGT reaches this temperature, the ECU goes into "protection mode" and uses KFLBTS until the EGT temperature falls below TABGBTS again. But if you go WOT and the EGT is below the TABGBTS threashold, it uses LAMFA. correct?
What is a safe TABGBTS temperature?
I noticed on some of the 2.7t ECUs files the TABGBTS is set way higher than 399C.
The ECU will always run the richer value of both |
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userpike
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« Reply #6 on: August 05, 2012, 12:42:16 AM »
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The ECU will always run the richer value of both
So then whats the point of tuning both maps piviting on TABGBTS? or having both maps at all for that matter? It seems like something is missing from the "equation" here. |
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nyet
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« Reply #7 on: August 05, 2012, 12:54:19 AM »
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Re read the fueling section of the s4wiki tuning article.
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ME7.1 tuning guideECUx PlotME7Sum checksumTrim heatmap toolPlease do not ask me for tunes. I'm here to help people make their own. Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your ex
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20VTMK1
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« Reply #8 on: August 08, 2012, 04:20:02 AM »
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Hi Guys,
Is it correct to say that the stock TABGTS is a bit on the low side ? I have picked this up to 500 Deg C for normal day to day driving . I know with out logs its kind pointless , just thinking out aloud.
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tuffty
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« Reply #9 on: August 08, 2012, 05:39:35 AM »
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TABGBTS varies quite a bit depending on the engine spec from what I have seen...
On a Leon 180hp K03 for example TABGBTS is set at 400deg... on my AMK code S3 (K04, wideband lambda and EGT sensor) its set to 819deg... on an earlier APY S3 (narrowband and no EGT sensor) its set at 800deg...
LAMFA and KFLBTS are tuned very differently too... from what I can see the AMK/BAM setup as it has wideband and EGT uses lambda 1 as much as poss and relies on component protection and EGT modelling to enrichen accordingly... std settings on AMK/BAM KFLBTS is mostly set at 1... on the 512k APY maps its tuned to 0.74 on max load/rpm so guessing there is less intervention/protection models in these maps than the 1mb wideband ones...
<tuffty/>
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AndiS4
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« Reply #10 on: August 08, 2012, 07:30:27 AM »
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Its getting weird to me. I also thought, that tabgbts is the temperature treshold, wich starts the lambts to work for enrichment (if its chosen richer than lamfa etc). But why are the tabgbts set at a level that cant be measured via egt-sensors in the s4 and rs4 models (499°C)? The lowest measurable temp is 940°C afaik. Is a temp of under 499°C interpolated / calculated as signal, until the measurable temp of more than 940°C is reached? Otherwise the system would enrich a lot, and "component protection" would protect in situations, where no protection is needed (500°C doesnt seem to be critical to me  ). |
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phila_dot
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« Reply #11 on: August 08, 2012, 08:03:44 AM »
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Its getting weird to me. I also thought, that tabgbts is the temperature treshold, wich starts the lambts to work for enrichment (if its chosen richer than lamfa etc). But why are the tabgbts set at a level that cant be measured via egt-sensors in the s4 and rs4 models (499°C)? The lowest measurable temp is 940°C afaik. Is a temp of under 499°C interpolated / calculated as signal, until the measurable temp of more than 940°C is reached? Otherwise the system would enrich a lot, and "component protection" would protect in situations, where no protection is needed (500°C doesnt seem to be critical to me ). It's modeled EGT, not actual. |
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nyet
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« Reply #12 on: August 08, 2012, 08:15:27 AM »
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Its getting weird to me. I also thought, that tabgbts is the temperature treshold, wich starts the lambts to work for enrichment (if its chosen richer than lamfa etc). But why are the tabgbts set at a level that cant be measured via egt-sensors in the s4 and rs4 models (499°C)? The lowest measurable temp is 940°C afaik. Is a temp of under 499°C interpolated / calculated as signal, until the measurable temp of more than 940°C is reached? Otherwise the system would enrich a lot, and "component protection" would protect in situations, where no protection is needed (500°C doesnt seem to be critical to me ). |
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ME7.1 tuning guideECUx PlotME7Sum checksumTrim heatmap toolPlease do not ask me for tunes. I'm here to help people make their own. Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your ex
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AndiS4
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« Reply #13 on: August 08, 2012, 08:58:42 AM »
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This is no answer.
Even on the wiki, were talking about the 980degrees, which make sense to start working with lambts.
But why the heck is tabgbts set at 500°C? When tabgbts is the temp point of starting point of letting lambts influence lamsel....
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nyet
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« Reply #14 on: August 08, 2012, 09:01:03 AM »
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BTS is prophylatic.
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ME7.1 tuning guideECUx PlotME7Sum checksumTrim heatmap toolPlease do not ask me for tunes. I'm here to help people make their own. Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your ex
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