Results 1 to 6 of 6

Thread: Fuel Flow Calibration

  1. #1

    Fuel Flow Calibration

    I need to adjust my K-factor. It is currently set at 680. This IO360 engine used 15.0 gallons in 1.76 hobbs hours. The fuel flow computer says it used 18.6 gallons. I would adjust the k-factor as a fraction of 680:

    548 new k factor = 15.0/18.6 x 680

    The manual says: New Counts per .01 gals = (Old Counts per .01 gals) x (Disp GAL USED/PUMP GALS)

    Not sure of the meaning Disp Gal used vs pump gals. Did I calculate it correctly for a new K factor to be 548?
    Last edited by timotb; 05-19-2015 at 01:50 PM.

  2. #2
    ok....Shawn saves the day. "Disp" stand for display... unnecessary abbreviations can be puzzle to decipher

    18.6/15 x 680 = 843

    thanks

  3. #3
    I are operating in Liters. Do I do the equation in Liters or do I convert it to Gals first

  4. #4
    Advanced Flight Systems Shawn McGinnis's Avatar
    Join Date
    Sep 2012
    Location
    Canby, OR
    Posts
    638
    Yes, the gallons / liters units cancel when using with all liter values. It just happens to become "counts per 0.038 liters"
    Shawn McGinnis

    Advanced Flight Systems
    support@advanced-flight-systems.com

  5. #5
    I had to change my “red cube” and my fuel flow is off so I need to adjust my k-factor. I’ve already had two fill ups and adjusted the k-factor each time but still not getting an accurate fuel consumption. How many new k-factor calculations does it usually take before it is correct? Just curious.
    John Kazickas
    Sands Point, NY
    Glasair Sportsman N9GZ

  6. #6
    Oops. Just realized that I was changing the K-factor on my 5600 and not my 3400. Never mind.
    John Kazickas
    Sands Point, NY
    Glasair Sportsman N9GZ

Similar Threads

  1. Rotax 914 Fuel Flow Wiring
    By recmob in forum Engine Sensor Installation Questions
    Replies: 1
    Last Post: 03-03-2015, 11:28 PM
  2. Fuel Flow and Quantity in Litres
    By Supik in forum AF-3400s, AF-3500s, AF-4500s ... General Discussion
    Replies: 5
    Last Post: 10-01-2013, 09:53 AM
  3. Fuel Flow
    By garymail in forum AF-3400s, AF-3500s, AF-4500s ... General Discussion
    Replies: 2
    Last Post: 10-11-2012, 08:53 PM
  4. AFS-4500 Fuel Flow Discrepency
    By pvalovich in forum AF-3400s, AF-3500s, AF-4500s ... General Discussion
    Replies: 1
    Last Post: 08-28-2012, 01:40 PM
  5. Fuel flow indicator reading 0
    By Snowy RA in forum AF-3400, AF-3500 ... General Discussion
    Replies: 2
    Last Post: 01-05-2011, 11:11 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
  •