First of all, your request is a shoe-in for Nitrous oxide!!
but if you for some reason detest and loathe NOS then what you are asking is actually prety cheaply done with a turbo, you disconnect the wastegate hose and set the tension so it is forced open at say 20 psi boost, and arround 5 psi with the hose connected (referenced to manifold boost) then you add a small tank holding about 1-2 gallons of water/methanol 50/50 mix and setup a cheap mechanical injection if you only run it at full throttle you wont need the barell valve or bypass jets. then set the mix to recirculate.
then when you push the "WAR EMERGENCY POWER" button a coulpe of 10$solenoids closes the boost reference to the wastegate increasing boost to 20 psi, and reroutes the recirculating MW50 mix from recirculating to either a couple of nosels in the intake plumming or even simpler a NOS plate under your carb, to give you extra fuel and keep detonation at bay.
and presto youve just more than doubled your power with a push of a button