2015 auto VT, 2013 manual VT × 2
First I want to say that many sprayers are actually illegal to use on some tracks and roads whereas water/methanol injection kits are not. The cost to setup and operate is far more than a water/methanol injection kit. The effectiveness of sprayer setups are also lower. They do not tend to lower IAT as much and have no benefits like adding extra fueling, octane, knock suppression, cooling, cleaning, etc like water/methanol injection kits do.Not sure if this is something that you want to write up anything on or not but I find intercooler sprayers (misters) interesting. There's 2 types, the "soak it down with a good spray" type and the "mister" type. From what I've read the misting type is harder and costlier to build but the fine mist works better for evaporative cooling. The question at that point is, whats the cost difference between a good sprayer setup and a good wmi setup? And, does that difference justify the running one setup over the other?
Now if you have a water/methanol injection kit already on the car you can easily setup a water sprayer for the intercooler as well. Or use the rear washer pump on the car already for a cheap intercooler sprayer setup on any VT. But I've seen little benefit from doing such when I can setup a VT on the oem intercooler now that will struggle to see above ambient IAT even when beating on the car.