NefMoto

Hi all
2l tfsi,we put K04,Injectors from S3 and autotech hpfp, now it was very hard to calibrate the westgate as at the start we had huge overboost, so after serval runs i manage to tune it too 1.5Bar all perfect, now as i requast load from 190 and now 220 , on high revs car cut and requast boost drop too 600 or similar numbers, are we missing something here why cant get requast 1.8bar, when we requast 1.4 bar and then we have overboost with westgate it doesnt cut, but if we just change the requast to 220 its start cut in high revs with low boost requast.


You can see on V3 all ok on 1.5 boost, V5 we just change requast and ldrxn,

I attached log+files,

Will be glad for some help.

Br

You'll never be able to request more than 1.55bar via calibration only, ever.

You have throttle intervention around 5k, but there could be torque intervention happening way before that.

Have you logged Timing Retard? If you've got excessive timing correction, the ECU could be pulling load.

Did you read ANY of the s4wiki tuning page concerning boost req near pressure sensor limit?

Hi
Yes i check retards and now they on 0 all the way so no pull back from this, and yes i read wiki on me7 , but there is still mods for this boost 2 bar and 1.8, so the question is, how i can make 1.8 bar without any cuts,

Hi
Mybe on this mod need also replace map sensor ?

Update, now i am get boost of 1.8 bar with no issue, but as i target 2 bar again while make a run in 4 gear it cut and close throttle arounf 5k and 6k twice in a run, mybe someone know if need change axis of this map KFLDIMX ??

Going to mention what you did to get it working @ 1.8 bar? Upgrade the map sensor yet?

i did remove all limiters for turbo, and map sensor is stock, and i get peak of 2 bar also, tomorrow will check it deaper why it cut in high revs, but the question is if need to change axis for this map ??

Why are you not asking why there is throttle cut?

Hi
I ask why in the beginning , this is why i open this thread cause i dont find any more why it cut, so i ask some help if someone see if it sw problem here,

What map are you asking about changing the axis of? So.Many.Questions.

The wiki suggests several possible reasons for throttle cut. You can't spot one offhand that applies to your log?

If i had to guess, positive deviation. Not sure why you didn't throw a code.

Thanks i already change the and mod the delta, i raised LDRXN to much higher and still on 1.9 bar something is happen, all axis in my map are stock, beside KFMIOP  that i raised load to 180 200 , all other axis is stock and i think need alter some axis for this K04 mod,

Why on earth would you mod the delta instead of fixing the root cause, which is positive boost deviation? Fix that first.

maybe injectors are maxed out ,did you log channel 33 to see what is lamda percentage at point you get the cut?

You are targetting WHAT? Please provide some datalogs of this

Hi Guy, from the topic i have the similar issue.
My N75, Wastegate and BOV all replaced. Previous my boost is uncontrollable and hit 2bar and power cut.
After fixing it now is target at 1.8bar but it will still cut.
ECU is tune and tuner mention is my HW issue. Since i already replace the part. I not sure where else to find.

By the way i'm using MED9.1

your lpfp is dropping, thats all you can see from the log

there is no n75 duty in the log

Changed my LPFP.. Now holding at 5bar at WOT. We might found out the issue.
High chance is DSG limiting the Torque request.