You could try the small or medium jet before the compressor wheel, or the small before and the medium or large after the IC. Water before the compressor works good, after the IC we would typically use 50/50. Is the air temp sensor after the IC? If so, methanol sprayed after the IC and before the sensor will give the biggest effect on the charge temp and the sensor. The down side to cooling with methanol is how much it will affect the AFR's.