My thoughts here, with a due respect.

Power does not come free. To get more power the two laws of Thermo Dynamics are always smacking us around. Efficiency is perhaps the most high performance quest we can have. If we could get a 1-1 relationship this would be awesome , but we cannot. Almost any hp increase is going to cost more in fuel, driveabilty,or engine wear. The engine is working harder because there are increases in compression, temperature, and pressures, even if rpm is less.

My thought are: if you do not think you have enough power, you do not have enough engine. You can give a scrawney guy some steroids, or just hire an big guy. Which one is going to pop a cork first?