When concerning power with hydroxy injection, you guys may want to read the post I made here: http://oupower.com/phpBB2/viewtopic.php ... highlight=
It doesn't necessarily concern hydroxy injection, but explains the benefits of a "quck burn" and how to tune for it. The easiest way to understand the benefits is through an example.
Take two bows, a crossbow and a compound bow. Both have the same draw weight, but the compound bow will out-shoot the crossbow every time. This is because all of the force is exerted in over a smaller distance, at the very end of the pull.
This also works on an engine. You want all of the pressure to be exerted on the piston as soon as possible in the power stroke. The hydroxy injection (among other things, read the above post) helps with this. I think if we were to combine the "Singh Grooves" from the above post and hydroxy injection we would see extreme increases in combustion efficiency.