View Single Post
      02-03-2020, 06:24 AM   #325
kern417
Cheapskate
4450
Rep
4,993
Posts

Drives: 2018 440i |2016 340i | 2010 X5
Join Date: Aug 2016
Location: Cincinnati

iTrader: (1)

Quote:
Originally Posted by alyabiev View Post
Why does everyone talk about targeting boost with our ECU logic being load based? Boost will vary a lot, because 22psi on a cold morning below sea level is very different from 22psi in a desert hot environment high up in the mountains from a turbo performance perspective.
Your tune might vary from someone that's tuned in a different climate, but boost on the same tune doesn't vary that much. Maybe +/- 1 psi going from summer to winter here.

The biggest contributor to load is the MAF values and that has a correlation to boost. You can adjust the load profile however you want but MAF readings and boost for the same turbo will be consistent. So we talk with what makes sense in these scenarios. Because at the end of the day, "175% load" doesn't translate to anything useful in discussion.
__________________
Quote:
Originally Posted by umizoomi View Post
As long as 3-pedals are an option, I will exercise my right to suffer the handicap and indignity of slower shifts and reaction times.
Youtube/Instagram/TikTok: @kern417
Appreciate 1
OzBMR574.50