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Thread: 2017 Focus RS EXhaust temp limit 2.3L

  1. #21
    Tuner in Training
    Join Date
    May 2021
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    20
    Quote Originally Posted by Seishuku View Post
    Yeah, no problem!

    I suppose if that's what they told you, that's probably correct then.
    It's just a math equation, once again COBB has a page that describes how it's done more or less:
    https://cobbtuning.atlassian.net/wik...ages/948601266
    It's fairly involved.

    It's also possible that the PID tops out at 37PSI for whatever reason.
    On my Mustang, there's a high resolution MAP PID, might not be a bad idea to switch to that if it's available.
    You were right! I?m hitting a wall with the map sensor. I?ve been trying to figure out why I can?t make more than 22 psi of boost. And it turns out that in order to make more than 20psi both TMap and Map ( intake manifold pressure sensor ) needs to be upgraded.
    We only upgraded the Manifold Map sensor.
    We just placed on order for the second and I will let you know and post the log and power numbers.
    Last edited by alsdriftshop; 08-15-2024 at 11:15 AM.

  2. #22
    Tuner in Training
    Join Date
    May 2021
    Posts
    20
    Quote Originally Posted by Seishuku View Post
    Yeah, no problem!

    I suppose if that's what they told you, that's probably correct then.
    It's just a math equation, once again COBB has a page that describes how it's done more or less:
    https://cobbtuning.atlassian.net/wik...ages/948601266
    It's fairly involved.

    It's also possible that the PID tops out at 37PSI for whatever reason.
    On my Mustang, there's a high resolution MAP PID, might not be a bad idea to switch to that if it's available.
    Well even after the upgrade of both map sensor this same results here is a clean run map and log take a look at it.

    thank you
    Attached Files Attached Files

  3. #23
    Advanced Tuner
    Join Date
    Jun 2019
    Location
    Wisconsin
    Posts
    339
    Log is still showing MAP topping out around 37PSI, but besides that the only thing that stands out in the log is turbo airflow vs turbo airflow desired... It's a modeled value, so I'm not really sure if that has any bearing on torque management.
    And at 20 seconds in on the log it says overboost is detected, though it didn't drastically pull load, but it might be doing something, so you might have to do into Engine Diag. -> Airflow -> Overboost and set those up to disable that. Usually when overboost is detected, it will set a DTC and force into wastegate FMEM (wastegate spring pressure only), but it might not be detecting it for long enough to do that.

    To disable overboost, set overboost TIP threshold to max, TIP threshold to max, TIP near saturation to max, and excessive threshold to max.

    Something else I would like to try would be playing with pedal position WOT start/end values (ECM 44373 and 44374), maybe try start at 358 and end at 512 and see what happens?
    Based on your log, I don't think it will do anything helpful, because your driver demand limit source and torque airload source are both "no limit".