understanding kflbts TT225 apx(512ecu euro2) vs TT225 bam(1mb ecu euro3)/TT240

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Topic: understanding kflbts TT225 apx(512ecu euro2) vs TT225 bam(1mb ecu euro3)/TT240 (Read 5156 times)

dantt

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	understanding kflbts TT225 apx(512ecu euro2) vs TT225 bam(1mb ecu euro3)/TT240 « on: November 12, 2014, 01:44:52 PM »

hi,
i'm trying to understand how modify my kfbts on my TT

tt 225 apx is much rich !
at hight load and hight rpm the values are smaller than 0.78 why? to keep egt low?

in TT225 bam with ecological legislation more restrictive (euro3) is often 1; but in TT 240 those values, at hight load and hight rpm, are between 0.78 and 0.75

kflbts of TT240 seems a good configuration

why audi don't use this configuration on old TT225 apx? apx is richest than TT240, why?

can i use at hight load ,the TT240 kflbts configuration?


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bk56190

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	Re: understanding kflbts TT225 apx(512ecu euro2) vs TT225 bam(1mb ecu euro3)/TT240 « Reply #1 on: November 13, 2014, 03:24:28 AM »

Hi,

Why audi don't use this configuration on old TT225 apx? apx is richest than TT240, why? : BAM and TT240 have an EGT sensor to protect the turbo in case of high EGT.

EGT enrich
There are two types of EGT enrich in ME7
-BTS (open loop) - when modeled EGT (block 034) reaches TABGBTS (500°C for the S4, 750°C for the RS4), the requested AFR tracks lambts if it is richer than lamfa.
-ATR (closed loop) - when measured EGT (block 112) reaches TABGSS (980°C), ATR will add fuel via dlatr, which is generated by the ATR PID.

=> http://s4wiki.com/wiki/EGT

So, APX doesn't have ATR module, only works with modeled EGT and fueling is very safe;


« Last Edit: November 13, 2014, 03:35:38 AM by bk56190 »	Logged

dantt

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	Re: understanding kflbts TT225 apx(512ecu euro2) vs TT225 bam(1mb ecu euro3)/TT240 « Reply #2 on: November 13, 2014, 04:26:03 AM »

thanks for your replay,

in some forum i have read that on apx lambda sensor works different: 0.6 is lean, 0.7 0.8 is rich

i'm lookin for "trust tutorial"


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dantt

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	Re: understanding kflbts TT225 apx(512ecu euro2) vs TT225 bam(1mb ecu euro3)/TT240 « Reply #3 on: November 13, 2014, 05:42:28 AM »

Quote from: bk56190 on November 13, 2014, 03:24:28 AM

thanks for your explanation.
I will not use configuration of TT240 kfbts


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fknbrkn

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mk4 1.8T AUM

	Re: understanding kflbts TT225 apx(512ecu euro2) vs TT225 bam(1mb ecu euro3)/TT240 « Reply #4 on: November 13, 2014, 06:14:39 AM »

apx has a narrowband o2 sensor


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