Results 1 to 3 of 3

Thread: What is normal overshoot/undershoot for CL wideband readings?

  1. #1
    Tuner
    Join Date
    Feb 2016
    Location
    Orlando, FL
    Posts
    83

    What is normal overshoot/undershoot for CL wideband readings?

    I notice when driving cruising speeds around 50mph that my wideband gauge overshoots/undershoots 1.00 Lambda. I understand this is normal as it is correcting, but how much is normal?
    Torque_Vector
    408ci stroker LS3 1998 BMW 323is - 490RWHP 466RWT in 100 degree weather
    260cc CNC Ported PRC heads, 11.25:1 Compression, 4" stroke, 242/250 .615/.615", Nick Williams 92mm TB, LS3 intake/fuel rails, FAST 39# INJ, 3" x-pipe dual exhaust

    Additions: ID1300 INJ, Flex Fuel Sensor, Aeromotive 5GPM variable speed Fuel Pump...

  2. #2
    Tuner
    Join Date
    Feb 2016
    Location
    Orlando, FL
    Posts
    83
    Can you change the gain of the O2 Sensors? If so, would this help if they are not in the stock location?
    Torque_Vector
    408ci stroker LS3 1998 BMW 323is - 490RWHP 466RWT in 100 degree weather
    260cc CNC Ported PRC heads, 11.25:1 Compression, 4" stroke, 242/250 .615/.615", Nick Williams 92mm TB, LS3 intake/fuel rails, FAST 39# INJ, 3" x-pipe dual exhaust

    Additions: ID1300 INJ, Flex Fuel Sensor, Aeromotive 5GPM variable speed Fuel Pump...

  3. #3
    Advanced Tuner
    Join Date
    Jul 2015
    Posts
    925
    Quote Originally Posted by Torque_Vector View Post
    I notice when driving cruising speeds around 50mph that my wideband gauge overshoots/undershoots 1.00 Lambda. I understand this is normal as it is correcting, but how much is normal?
    If you are running CL looking at your STFT is a better indication because your wideband is showing the Lambda value after the PCM has made corrections to keep stoich.