Has anyone replaced a stock knock sensor with a Bosch unit http://www.boschautoparts.co.uk/pcRetS1_5.asp?c=2&d=1 or the Delphi unit http://delphi.com/manufacturers/auto/sensors/et/flat/?

What are the specs of the stock knock sensor as far as output voltages and knock frequency? I've looked in the service manual but couldn't locate any information about the stock knock sensor other the torque spec.