I run a mix of alcohol and water through a modified Spearco system. It allows me to run ~12psi of boost with no pinging (and no intercooler). Lets just say that with the water injection I was able to extract about another 25hp form my system than I was getting without it.

2000 SVT Turbo 295hp/269ftlb@12psi #1 for Bendix Brakes Kits! Knuckles rebuilt w/new bearings $55 AUSSIE ENDLINKS $70 Gutted pre-cats $80/set A lack of planning on your part does not constitute an emergency on mine!