Easy to do with a manual choke and a carb, just open up the nozzles a little. With a fuel injector, much harder to do. You'll be stalling early and often. I looked into this a few years back, the data wasn't pretty.

The alternative is to locate the chip that controls your injector, learn it's language, get a spare, uncompile it and make the needed modifications to the ratios, and burn yourself a new one to keep as a spare. Easy.

Yeah, easy. *whimpers*