Yes I have been twice both on hot muggy days. I did gain 1 mph on the top end but I also am LOSING it quicker as I am pulling in more HOT air and HAL is quickly pulling timing quicker. I dropped from 117 mph in the 1/4 to 114 and still had better ET. Consistant 12.0s to 12.3 each time down the track. So I now have the BWoody Thermolator and waiting on the Meth/Water kit to try and keep things a bit cooler. So I feel the 90mmTB is really a two edge sword. Yes it gained some RWHP but it accelerates the taking away by HAL alot quicker and I think in a bigger chunk. OH yea Thanks everyone for the warm welcome!