NefMoto > Noob Zone > Noob Questions (Moderator: turboat) > understanding kflbts TT225 apx(512ecu euro2) vs TT225 bam(1mb ecu euro3)/TT240
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Author Topic: understanding kflbts TT225 apx(512ecu euro2) vs TT225 bam(1mb ecu euro3)/TT240  (Read 5726 times)
dantt
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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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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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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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Quote from: bk56190 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;



thanks for your explanation.
I will not use configuration of TT240 kfbts Smiley
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fknbrkn
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mk4 1.8T AUM
apx has a narrowband o2 sensor
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