What's the point???

[Pikachoo]

I understand that if you drop the compression ratio within your cylinders you can run more boost therefore creating more horsepower. But I am running into a conceptual block here. If I drop the compression in my cylinders, but then crank up some more boost, aren't I ending up with the same pressure within the cylinder that I had before I dropped compression?!?

[swedish]

Nope, here's the deal, (this is a 100% volumetric efficency), a N/A engine pulls in air and compresses it (along with fuel) 10-11-12 (:1) times. When you run boost at 8:1, your commpressing the 6-12 psi 8 times. This would make it seem that you might as well run 3 psi on a cheap setup, but with boost and lower comppresion, the engine isn't working as hard as low boost and higher commpresion.

[pvang31019]

all the rage nowadays is running high compression and lower boost....

the lower compression is just there so that you have a larger window for tuning error

[RedRocketGSR]

I'd personally rather have lower compression and be able to boost higher.