There are boat load of things to do when you bump the compression via external forces. Let's take an extreme example. In the NHRA Top Alcohol are either blown methonal or injected nitro. Injected cars run 10:1 to 12:1, the blown cars might run as high as 8.5:1.
Lots of things need to be changed. I'm always amused by my friends who drag their F-Birds and talk about some hot shot who takes his turboed "rice burner" (yup, that phrase is still around) and drops the bottom end at about the 1000 ft mark. Or splits the tranny at the line.
You change everything at once or you will wind up changing things as they break. Weekly, most likely.
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