A pulley really has no meaning to where your injectors should be. If you're running at 21ms to keep your afr at 10.5, then you're in need of upgrading your injectors.
The PCM commands the current to the injector milliseconds for a given air fuel ratio. If you're keeping your intake charge cooler with the methanol, then you're moving more air into the engine. If you sit and think about it, moving so much air at a certain temperature is going to differ from application to application. Just because you've read that "oh, I'll be ok down to a 3.0" doesn't mean that you can hold to it. You're moving air into the LIM from say 280* down to say 200* because of the alcohol....which equals more fuel.
I hope that I haven't completely rambled on aimlessly....
