[baz]

water spray into the carb or even better a water methanol mix
has been used for many years , the first time i heard of its use was in german WW2 fighter planes to boost power on take off and in dog fights (when you see a photo of a FW 190 they almost always have a tank under the center line this is for a meth /water mix)

it is sprayed into a jet engine on a non after-burner engine to do the same thing right up to and including the B52