I kinda skipped page two, but I read and have been told by a few race car and performance shops that raising the psi of boost on an engine in turn(mathmatically) raises displacement and compression ratio. It raises displacement because it is cramming more atmospheric pressure than can naturally happen, there is a mathmatical formula that I dont care to resite, plus I just got out of my bio 2 class. Second...The valvetrain in an engine can only spin so fast before it will self destruct, any engine, some are built more stout than others. Which is why when you add boost(that raises the cr) to an already high 6.2, the engine self destructs starting with the weakest link. Lowering the cr with aftermarket pistons allows you to raise the boost by a few more pounds because you now have more lea-way(sp?) to play with because you are a little bit lower from the boom threshhold than you previously were. Make sense?
Remington
