You don't need much pressure to really wake up a well designed engine like the 1.5 in a civic VX, and hypermilers would rerely even need that. Very small extremely high speed for a little boost very rarely but max a couple minutes then it has to recharge. Could be combined with a turbo and even less displacement, maybe 100 HP out of .5 liter for a short while.
Then drive the car with the normally aspirated engine with higher load and better efficiency all the time when just maintaining speed, with better aero.
Go even more radical and have a two cylinder for each axle, or my drive system and get rid of the throttle altogether.
regards
Mech
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