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Ms2 pnp mustang req fuel question

Discussion in 'EFI Tuning Questions and Engine Management' started by Cregger, Jun 11, 2015.

  1. Cregger

    Joined:
    Mar 4, 2013
    Helping a friend tune his mustang with ms2 pnp. The car is currently turbo so we changed the injectors to 630cc dekas. I went and changed the req fuel settings and then the dead time. I started to tune the VE map and noticed that the VE numbers in the cells are higher that I think they should be. I find it hard to believe that pumping efficiency at idle is around 70% at 14.0 afrs and over 100% at 101kpa. I changed the req fuel number manual til I felt like the VE at idle was more believable(30ish). Was it ok for me to do that? Has anybody ran into this?
     
    Cregger, Jun 11, 2015
    #1

  2. racerron67

    Joined:
    Feb 17, 2014
    yes it is ok to change the required fuel to make the VE no. more manageable (real). i had that happened to me. for some reason i had the engine size wrong (to small) and by 3500 rpm my ve map was maxed out at 255.
     
    racerron67, Jun 11, 2015
    #2

  3. Cregger

    Joined:
    Mar 4, 2013
    well that makes me feel better. thanks for the reply!
     
    Cregger, Jun 12, 2015
    #3
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