Re: Cure For Brera/159 Irraitc Turbo Boost Under Full Throttle ??
I've got some answers from a technical expert at AR Germany. I hope, I'll be able to translate the technical terms correctly.
According to the expert, the software for the pressure regulator on the turbo on the 2.4 jtdm is programmed in such a way as to provide a boost of around 1,35 bar. However, in order to maximize the power output the boost can shortly go up to around 1,5 bar. But in this case the regulator will step in with a time lag of a fraction of a second and bring the pressure back down to 1,35 bar to shield the turbo from damage.
He said, you could compare it to "oversteering" - this is properbly not the correct englisch term - on a heating system in a house. When the temperature is raised from 20 degrees celsius to 24 degrees, the heating system will set it so strong for a short time as to provide output for a temperature raise up to 26 degress in order to heat the room faster. Afterwards the regulator will step and reduce the waterflow in the heating system to keep the temperature level at the desired 24 degrees.
Without this "oversteering" on the turbo pressure the alfa would accellarate slower, the technician said. I've checked this morning when I was driving my car. And indeed, despite the jerking feeling when the turbo gauge flys up and down the tachometer shows a constant increase in speed.
I hope, you can make something out of my writing. Sorry for not knowing the correct technical termsn.