Here is some more info on injection additives:
http://www.turbofast.com.au/racefuel12.html
Ive seen alot of “racing fuel kits” out there that use a water/meth/nitro mix. Nitro will yeild good gains but can be very dangerious. As with the other injections, this will require a different tune (more timing etc…)
Alot of people also use regular blue windsheild washer fluid since its already a mix of alcohol and water and is cheap/easy to obtain.