100& Alcohol injection ?

[phantomd]

Hi together.
I am new on the board. Here first a short overview, i am living in switzerland, i am 25 years old, i run a Subaru Impreza MY 2002, that should be enough

Now i have already tested a mix of 70% water to 30& alcohol, it runs nice. My question now, get i any damage or problems if i made some tests with 100% alcohol ? Is it usefull to use 100& only alcohol withou water mix ?

Thank you for your help !