currently running a 50/50 mix and on hot 100* CA days, the IAT go down to around 68*. and yes that temp drop takes a few seconds. Sucks especially with a stage 1 kit (7 psi switch) as sometimes I have to 'prime' the intake charge with a few throttle blips.im running just distilled water since i cant find methanol but driving around in 100*F weather, a single nozzle post IC gets me from 140* F down to 90*.