Aha, so if you were to hook up an A/F mixture gauge and watch it like a hawk, you could theoretically boost above the fuel cut without any problems.

 

Here's an idea: Lots of cars use a cold-start injector that adds more fuel on demand. Would it be possible to retrofit something like this into the intake manifold and provide some way of managing it? That way, you could do the previously discussed mod to eliminate the fuel cut, then have this extra injector turn on above that point, more or less taking over fuel control once the factory system has maxed out? I know there would be some substantial work involved in order to control this setup, but I'm just throwing the concept out there to see if it could possibly be viable.

Check this out:

http://www.graphics.cornell.edu/~v/fcd/