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5 p.s.i. at 10.5:1
Is near the same as having 10-12 p.s.i around 8:1
If you simply have a goal in terms of boost pressure.... Then go low compression. If you want a nasty street machine leave the stock compression ratio.
When your off boost you'll have a high compression ratio and plenty of power until you hit boost, run a large turbo and make impressive power. Other than ease of tuning I really have never understood why so many people lower their compression ratio.
I have a good friend running a T70 on a rotary with a 10:1 compression ratio. While off boost it screams like an N/A rotary. When it hits boost at 5K it spools up to.... 5 p.s.i. (Ironic I know) and lays down 440 WHEEL horsepower on pump gas. Now this is an OLD school 12a 1.1 Liter, on a 13b it would make more power.
And rotaries are really no different in terms of power production than piston engines, and 12a's are especially similiar in power production to the 4A-GE.
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