I hear everyday that COP is fine for nitrous cars, but doesn't work on turbos with methanol.......rubbish. They work just fine. In addition to car Go Green mentioned, there is also Tom Bailey who runs COP with a Holley box on his twin turbo methanol car and countless others. While SOME ECUs don't work well with COP, it's NOT the fault of the coils, they are plenty hot. There are also some screw blown EFI cars with COP