No cam signal being used. My whole point of the thread was to point out the effectiveness of these new TBI EFI units and in comparison to MPFI are pretty close. My guess is that the MPFI might provide 1mpg better in around town part throttle driving. At wide open throttle neither provides an advantage unless we are also talking individual MPFI injector tuning etc and that is outside the scope of my original intention and also outside the capabilities of off the shelf units like the edelbrock pro flo.
