View Single Post
      12-02-2019, 07:12 PM   #11
enlimalima
Enlisted Member
10
Rep
41
Posts

Drives: 335i F30 PWG
Join Date: Oct 2019
Location: Indonesia

iTrader: (0)

Quote:
Originally Posted by JaredG_F30 View Post
Boost pre-throttle is the boost pressure measured in the charged air system just prior top the throttle plate.

Boost target (or commanded) is the boost pressure the DME wants

Boost deviation is boost target - boost (pre-throttle)

I'm assuming you meant IAT, not AIT! There must be two sensor locations for measuring intake air temps. I'm assuming the default IAT PID chosen is located in the intake air manifold. I'm not sure about the other one.

MAF, of mass air flow, measures the amount of air being sucked through the intake. I'm not sure why there are 3.

I run IAT, ignition Cyl 1, boost (pre-throttle), coolant temp, EGT, knock detected, oil pressure
So what is the actual boost? And when you upgrade turbo and "increase" your boost (say to 20/21psi) do you increase the pre-throttle or DME target?

How do you know if the boost is working well?
Appreciate 0