Hey Chris...
I went to Snow's site & found what I was explaining & here's what they show...It's called Stage II but i attached what I copied:
Stage 2 Boost Cooler 
This kit uses manifold boost pressure to determine when and how much fluid to inject. Proportionally injecting according to boost pressure gives the most accurate delivery of water-methanol and allows the most cooling and performance improvement over the widest range. More power and driveability is the result. It can be used on any forced induction engine: carbureted, fuel injected, turbocharged, positive displacement or centrifugal blowers. The most suitable are the centrifugal supercharged and turbocharged engines, as they build boost is a more progressive manner concerning water-methanol injection. The positive displacement blower engines will work, but it might take more work to dial in the delivery. For higher boost applications (over 25psi), the controller can be upgraded to our VC100 unit. Now with Lifetime Warranty - please see details.
Kit includes:
UHO (Ultra High Output) Pump
3 Quart Reservoir
Digital Variable Controller
2 Nozzles To Cover a Wide Range of Horsepower
All Required Hardware Needed For Installation
Comprehensive Instructions
