[buzzinhalfdozen]

Art, I'm having trouble understanding exactly what you're trying to determine. I'm not aware of a way to trigger your timing light using the crank sensor which I'm assuming is a VR type,it does produce a sine wave but fail to see how to use that to trigger your light.You state that you're using your timing light to check CAM sensor timing? In what way are you checking this, I'm unfamiliar with your system, however most EMS units only use the cam sensor pulse to determine TDC compression cycle for sequential timing and fuel events. Does your cam sync have more than 1 trigger event per revolution?Actually I think the "offset" you're referring to would be for the crank sensor, my system uses this to trim out any errors between what the EMS "calculated"timing is and what the timing light is showing. As I stated I'm not familiar with your system, but most simply use the "trigger" tooth on the crank sensor...knowing it occurs X number of degrees before TDC then calculates timing events based off that, while utilizing the cam sync to determine which "cycle" it's on. Sorry for the long post just trying to determine exactly what you're tring to determine. Joe Also do you use a "missing tooth" trigger wheel for the crank sensor?