hey man, that is really dangerous for you engin to be running it like that in its infancy, your piston rings aren't seated properly in the cylendar and could cause serious damage to the block or the rings. the loss of power you noticed might be a cracked piston ring, or just your rush from unleashing the engine to the limit makes it seem like the low end is less than before. i hope its not any damage on ur motor, and good luck if it is.