I don't know why you would want to. That change in speed means nothing. Yeah you'll gain some KE but the point is mute with what your already getting.

The only way to significantly change a bows speed is to increase poundage, if your maxed out you can tweak a bow to gain a little more but what you gain is offset by the means to doing it.

Or you can significantly lower your arrow weight and again, what you gain is offset by what you lose.

I ask again, why would you want to?