After do the extracter , A/F will become rich/lean?

[beyond_4896]

Car : kelisa Engine : standard bolt on turbo. EMS : microtech MT4


I juz do the extracter.
Any ppl have tell abt, after change the extracter , will affect AF?

Cuz i think like tat...
Now when GEAR1 full throttle , RPM shoot vr fast..n boost coming fast..
so, i think , if the fuel mapping havent change , mean i get the boost at lower rpm.
so the fueling become RICH...



rite aa...?

 

[SkYwAlKeR]

since ur engine AFR is controlled by ecu, AFR remains the same as ur fuel mapping... changing extractor allows easier breathing/exhaling of ur exhaust gas out.... thus, ur rpm climbs faster.....

 

[boyzone]

Do u change ur fuel injector?

 

[davidv00]

depends of your ECU o2 sensor mapping reading, car ECU is dump enough to know what you did but they just do based on o2 reading. the cycle of ECU control started/ended with o2 sensor reading.

 

[m1adam]

im sure something wrong with ur mappings that makes it rich.

 

[beyond_4896]

ohh... no la..
I juz asking nia.

then y so many ppl said, after do the extractor, need tuning for better performance...?

 

[davidv00]

in fact, piggy/ecu/controller should be installed before any modifications, so whatever hardware you upgrade, it can output its best effects.

 

[beyond_4896]

yalo...
I still think wan to fine tune the microtech mt4 o not..

 

[m1adam]

usually when u improve the intake flow the air restriction flow is less bt ur MAP sensor should be able to detect and adjust ur AF ratio on its own so no need to retune unless ur microtech cant do that need to retune ur ECU.

 

[davidv00]

the adjustment of ECU on AFR has their bandwidth, thats where a piggy come into picture. sometimes upgrading hardware (especially engine mods) requires more than AFR only. my 2 cents.

 

[SkYwAlKeR]

waa... from changing extractor to ecu fuel mapping, microtech and MAP sensor.... vr heavy mods arr.....

change extractor only mah... it jz allows exhaust gas to flow out easier....