View Single Post
      11-10-2020, 03:25 AM   #34
IMS-340C
Major
IMS-340C's Avatar
Egypt
395
Rep
1,010
Posts

Drives: Self Tuned 340i 8AT RWD
Join Date: May 2018
Location: Cairo

iTrader: (0)

I also noticed this when doing WOT at low RPM.

It's seems with the cats removed the Turbo spool much faster than the ECU anticipating and it closes the throttle which result in what feels like a bog.

At that point in the logs boost spikes to 21-22 psi on stock Turbo then the throttle closure happens to regulate the boost.

Quote:
Originally Posted by rosstin View Post
Stands to reason if the ecu sees target boost is met/exceeded sooner, it has to do something to adjust. It still assumes factory back pressure.
__________________
2018 340i 8AT RWD - M Sport - Catless MPPSK - Stock Turbo - Stock HPFP
-------- Tunes: Self Made Tunes - MHD ------ Fuel: 92RON/87OCT --------
Appreciate 1
rosstin326.50