Bringing TBI and Multi Port Fuel Injection to a New Level.     EFI Conversions and Tuning! Seattle to Portland! E-mail Tuning Consultant!
Results 1 to 3 of 3

Thread: Airflow pid scaler

  1. #1
    Fuel Injected!
    Join Date
    Aug 2012

    Airflow pid scaler

    Moving along from my previous post to do with mat. All different engine bins use airflow from 0 to 256 no matter the size of the engine so would guess it represents something like 0 being the bottom left of a ve table and 256 being top right of table. Just my wild guess. Now moving along to airflow ( which in SD is calculated ) there is a airflow pid scaler. I know what scaling means. What do you think this one represents? Some for instance, 7.4 scaler is .24, 4.3 CPI is 2.29 and 2.2 mpfi is 1.95 all using the 747 ecm.

  2. #2
    Super Moderator
    Join Date
    Mar 2011
    Camden, MI
    if it's like what is done with the MPFI 60V6 code, then that airflow scalar is used to calculate backwards from fuel flow to create an airflow value. sounds janky, but it works... kinda.

    I want to say another one is used for EGR flow calculations, but I can't remember the specifics about it.
    1995 Chevrolet Monte Carlo LS 3100 + 4T60E

  3. #3
    Fuel Injected!
    Join Date
    Aug 2012
    I tried to get some numbers that made sense but no go so guess I will pick a bin and try trial and error.

Similar Threads

  1. LS1 airflow per step?
    By ericjon262 in forum OBDII Tuning
    Replies: 2
    Last Post: 02-07-2015, 11:35 PM


Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts