I've done it from day one from the recommendation of others. Ice bags can't hurt, as long as they don't leak, they do take the edge off the heat coming from the intake/blower area. I datalog intake and downstream intake temperatures and they stay low enough to always get my max timing, even on second and third runs. Will an ice bag get you a tenth, maybe not. Is it practical for a solo trip to the track, carrying a cooler big enough for 3-4 bags of ice and DR's, maybe not, but I bring a truck for my drag wheels and tools, so I just throw on a big fishing cooler. Having a routine to focus on make passes very similar, and for me that includes fighting heat soak as best as I can. It could give you a little more confidence and that might get you a tenth with a hole shot. Quick passes come with repetition, practice and confidence in your car and cooling it as best I can between passes is just what I do for an edge.
- 04_snake