If I were to use the ESS supercharger kit and upgrade to the 92mm pulley, do you think just an intercooler would be sufficient or would I also need to use meth/water injection in addition to the intercooler?
I have a similar setup although I do have larger throttle bodies and exhaust headers (you can see my sig).
With stock boost (96mm) you are right on the edge of heat soak. For 1 or 2 pulls on the street, you are OK. But more than that, you will some a difference. 96mm yields about 6 to 6.5 psi.
With the 92mm pulley, I have about 8.5 psi. Boost does come on earlier. I used 80/20 meth/water. I changed the settings on the meth controller to have the meth/water kick in at 5 psi (stock is 3 psi). On a dyno, with a slipping clutch, (getting worse each run) I saw a minimum of 30 extra wheel horsepower on the last run of the day. I suspect the difference is more like 50-60 based on my tuner's observations and experience, but I haven't been back to the dyno since I replaced my clutch. If you use meth, you need to get someone who can tune for it. Otherwise it does nothing but richen the mixture (which is nice but that simply acts as a cooling agent). Quelling heat allows more timing to run; or more precisely, less timing to be taken out by the computer controls.
The advantage of an intercooler is it is pretty foolproof. Air to air gives less cooling, but much more reliable from run to run. Air to water does better, but then the water can heat up, changing its effectiveness. The one thing to consider with an intercooler is that is can rob 1-2 psi of boost, so you need to compensate. If you go that route, you may even want the 88 mm pulley, but make sure you have a really good tune.
Dinan Stage 3 suspension, SS jet coated headers, ESS SC kit w/ 1 range colder NGK's, 92mm pulley, 440 Big Greens, TTFS alpha N tune for meth, RK plenum plates, SBC Endurance Stage 3 Kevlar performance clutch setup, "Jed" lightened DMFW, open brake ducts, TEC cupholder, U.S.(Euro style) tilt/slide armrest, 6k HID fogs, Umnitza bi-xenon flamethrowers w/6k super white low beams, rear fogs, V1/Stealth1, dual head LI, 2.65 diff w/40% lockup/2x dynamic, compact spare, Euro trailer hitch, Mocal oil cooler, ACS type rear spoiler, Rogue custom SSK and tranny mounts, ST 355 BBK (fronts), BP sway bar brackets, Bluetooth retrofit, Speedhut boost gauge (20 psi), Dinan TB's and VS, KB BAP, Howerton/HFS-3 Aquamist WI trunk setup (50/50), with 2nd gauge in rear view mirror, aftermarket trunk mounted sound system integrated into stock unit (amps and crossovers and sub and speakers).......