Called Fueltech. They said our results are typical...worse down low then as good at higher engine speed/loads. Maybe with some combinations that works. With ours' it doesn't. With our cam, intake runner size and a couple of other things we do differently we need all the help down low that we can get. From our conversation with Fueltech(typical results and not an anomaly) it's coming off and the mag back on. Very disappointed as the COP does have some technical and weight advantages but power is first and foremost with us.