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can a gen 7 be run without a o2 sensor?

Discussion in 'EFI Tuning Questions and Engine Management' started by 10seclx, Apr 22, 2010.

  1. 10seclx

    Joined:
    Apr 12, 2003
    as the title says, is it possible to run a gen 7 without an o2 sensor hooked up to it?? the reason I ask is we have my motor on the dyno now and have the dyno's WB hooked to it and don't wanna be modifying my DP to add a second o2 that will never be used again, so I thought of just leaving the o2 unhooked and would have to monitor the A/f off of the dyno insted of from calmap. Thanks in advance!
     
    10seclx, Apr 22, 2010
    #1

  2. TurboNova

    Joined:
    Jun 18, 2004
    Yes, to your answer your question. You run the Gen 7 in open loop instead of closed loop.
    But why wouldn't you use your O2 sensor instead of the dynos since that is what you are going to use with your ECU? You can easily datalog just as well with the Gen 7 as the dyno. If you don't then you will not be able to overlay the info on your VE table. You also can feed the Gen 7 the 0-5 v signal off the wideband so they both can have a wideband signal.
     
    TurboNova, Apr 22, 2010
    #2

  3. 10seclx

    Joined:
    Apr 12, 2003
    yeah I thought about that, but the dyno I am using I don't know if it will work or not without its wb, I will have to double check it again tommorow when I am there, have a few little things I still need to do to make it work on the dyno. Thanks for the quick reply.
     
    10seclx, Apr 22, 2010
    #3

  4. TurboNova

    Joined:
    Jun 18, 2004
    Dynos do not need their widebands hooked up to work. You will not be able to see your A/F on the dyno graph but that is what the Gen 7 datalogger is for.
     
    TurboNova, Apr 22, 2010
    #4

  5. 10seclx

    Joined:
    Apr 12, 2003
    on this dyno the printout includes the a/f ratio as well as ve and airflow so its o2 needs to be hooked up. but I will just bite the bullet and put a second bung in my dp and plug it off after.
     
    10seclx, Apr 23, 2010
    #5

  6. TurboNova

    Joined:
    Jun 18, 2004
    The Dyno does not need a 02 to give you horsepower and torque. It only needs RPMs for the Dyno to graph horsepower and torque.
    All the other info you are talking about should be logged from the Gen 7 since that is where you will be tuning from.
     
    TurboNova, Apr 23, 2010
    #6

  7. littlebluefoxbody

    Joined:
    Jan 15, 2010
    X2 The engine NEEDS this info not the dyno!
     
    littlebluefoxbody, Apr 24, 2010
    #7

  8. 10secgoal

    Joined:
    Jan 29, 2005
    Weld in a second bung ? :hmm:
     
    10secgoal, Apr 24, 2010
    #8

  9. Craig Smith

    Joined:
    Sep 17, 2003
    Screw the dyno O2. It's for a piece of paper. The Gen 7 O2 sensor is for your engine.
     
    Craig Smith, Apr 24, 2010
    #9

  10. mtpturbo

    Joined:
    Oct 3, 2005
    X2
     
    mtpturbo, Apr 28, 2010
    #10

  11. 86lxnotch

    Joined:
    Apr 2, 2006
    if its the narrowband then who really cares, it doesnt do much besides correction if its turned on
     
    86lxnotch, Apr 29, 2010
    #11

  12. TurboNova

    Joined:
    Jun 18, 2004
    If it is a narrowband for the Gen 7 it does really nothing outside 14.7:1 so it is worthless for tuning.
     
    TurboNova, Apr 29, 2010
    #12

  13. 86lxnotch

    Joined:
    Apr 2, 2006
    thats what i meant its only good for minor correction at cruise. other than that its useless. i still gotta get around to tying my wideband into my dfi cause i just have the narrowband in it now
     
    86lxnotch, Apr 29, 2010
    #13
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