fbpx
Login

 

Jump to Forum..

914 overboost

in General Tech Discussion 10 years ago

  • Re: 914 overboost

    by » 10 years ago

    Looking at your TCU memory printout the MAP sensor look good; 1411 millibar is about 41 inhg.
    It looks like the servo is not backing off enough; it should be less than 92% range at over 40 inhg.

    Scope is the calculation/graph between the airbox pressure and the target pressure parameters. You should not change anything here.

    Go to the Config page, Calibrate, Read Calibration. The numbers should be:
    servo offset-60
    servo range-900
    throttle offset-60 but this changes with throttle calibration
    throttle range-710 also changes with calibration
    airbox pressure sensor calibration parameter A-12219
    airbox pressure sensor calibration parameter b-250
    ambient pressure sensor calibration parameter A-6720
    ambient pressure sensor calibration parameter B- -37 (neg 37)
      
    Report

  • Re: 914 overboost

    by » 10 years ago

    How do you go to the config page If it was overboosting the red light is supposed to come on if the pressure reaches 1550 is that right tha map gauge in the plane would flick past 45 but the download indicates that's not accurate so the servo can be adjusted to open up a bit more
    greg
      
    Report

  • Re: 914 overboost

    by » 10 years ago

    Config page: from the main menus hit C, then C again and then R for read.
    - The light comes on at 45 inches, a bit of a buffer zone so you don't get lights going off every time you overshoot.
    - I dont think you should circumvent the system by adjusting the servo, we need to find the cause and fix it, not band-aid it.
      
    Report

  • Re: 914 overboost

    by » 10 years ago

    Thanks Rob
    I don't think the download has a config page in it but I will head out to the hanger and give it another go and report back
    Greg
      
    Report

  • Re: 914 overboost

    by » 10 years ago

    the version is TLR V4.6A
    Main Menu
    monitor scope 1 scope 2 history-buffer throttle quit
    This is what I see on the first page
    Greg
      
    Report
You do not have permissions to reply to this topic.
Related Topics
Title Category Replies
914 Problem Has Returned and The Previous Solution is Not Working 912 / 914 Technical Questions 7
914 EGTs 912 / 914 Technical Questions 1
914 Carburettor removal 912 / 914 Technical Questions 1
914 cuts out passing 5200 rpm 912 / 914 Technical Questions 1
Fuel Flow in rotax 914 912 / 914 Technical Questions 3
Follow Us

Recent Videos

Safety First!

 

To receive critical-to-safety information on your ROTAX Engine, please subscribe to
ROTAX-OWNER.COM

ROTALK News



ROTALK NEWS Episode 5
Rotax-powered Sling aircraft from The Aircraft Factory, the AVMAP Navigation and engine monitoring system, and the Rotax powered Tucano Experimental and Light-Sport Aircraft.



ROTALK NEWS Episode 4
ROTAX's 915iS-powered Aquila A211 test aircraft, the Scheibe SF-25C Falke (first-ever 912-equipped aircraft!) and ROTAX factory in Gunskirchen, Austria.


ROTALK NEWS Episode 3
Michael Smith's Rotax-Powered Searey Circumnavigation, the amazing Rotax-Powered Lockwood Aircam and Anthony Caere's chimpanzee rescue operations.

Prize Giveaway!


SUBSCRIBE NOW
to automatically enter this years draw!

Login