That was kinda my point, 220hp x .25 = 55hp 220hp - 55hp = 165whp
You would end up with a (somewhat paltry) increase in power at the expense of $$$$$$.
It's much easier, faster, simpler, well documented, etc, etc, etc to turbo your car if you're looking for more power.
The best bang for buck, hands down, is a lightweight flywheel. No questions if/and's/or but's. Otherwise, just save your coin for a big project or be happy with miniscule increases, OR leave it be!