MacRumors poster Rockem modified some .kext files to change when his laptop’s fans should kick in.
I just modified some .kext files to tell when my mbp to kick in the fans and to run them a bit faster. Now my processor is 40˚f-50˚f cooler, and 5˚c-10˚c for all you out of the usa. Battery life is maybe 5min shorter, and the fans are not all that much louder. 50% cpu with modifications is the same as my idle temps before and 100% cpu with mods is like 50%cpu without mods.