I'm already running a far smaller pulley than anyone has ever run on a Gen3 M62 that I know of, and have no KR other than maybe 1-2° at the top. However, I know that'* going to be worse in the summer heat.
The reason I'm messing with water injection is because I've been messing with it for 3 years, and I'm not done yet.
In addition to that, I know for certain that I'm producing a ton of boost charge heat with that 2.2" pulley. That heat isn't helping me. In fact, it may be hurting me to the point that I should switch to a 2.3" or 2.4" pulley to prevent the heated charge i the LIM.
Unless the water injection counteracts it.
John, the ELC pump works fine with the tank. It takes very little time to charge it to 65psi. After 3 track runs or so, I'll top it off while icing down and cooling off in the staging lanes. Top offs from 40-65psi take about 30 seconds. The tank is only a 2-gallon capacity to begin with, and I usually only fill it with 1 gallon of water. That leaves one gallon of volume for air, as water doesn't compress.