[jakobnev]

High compression ratio does improve fuel economy.

I didn't intend to suggest bringing down total compression, only moving a larger portion of it to before the intercooler, and having the piston preforming a smaller part of the work. All this without negatively impacting the in-cylinder expansion after combustion. (Which is what does all the useful work.)

With more boost from the turbo the intercooler would get more heat from the intake air, and you could end up with more air in the cylinder with the same final pressure.