well do what ya want.. ive installed a bunch of alcohol kits, on all different kinds of vechiles from turbo buicks to blown Vipers and work at a chasis dyno shop on the weekends.. and running straight meth will yield you more power and less knock/ detnation...
But feel free to try your own thing and post up your results..
If your aim is to avoid detonation. the you need octane.. meaning a higher octane fuel.. in this case methanol.
If you need only cooling, then use water or methanol.. or both.
If you crank up the water.. you will spit and sputter as it does not BURN. So tuning gets way way way complicated.