crank triggers?

[ericjon262]

is there any particular reason other then packaging why crank triggers are sized the way they are?


example:


two crank triggers, one 80mm diameter, one 140mm diameter. the notches on both wheels are the same size in degrees


I could see where going smaller might cause problems, with the sensor not being able to pick up the gaps, but is there any reason a larger trigger would be a problem? seems to me like a larger sensor would be desirable, as the larger gaps would be easier for the sensor to pick up.

Edit:

I realize now that this post would probably be better in EFI systems instead of OBD2, feel free to move it if necessary.