It is worth pointing out that 12psi is fine for the B230FK/FT(1990+) engines.
The B200FT and pre1990 B230FT had weaker con-rods and as such cannot handle the same level of boost. These engines shouldbe limited to ~10psi.
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Gavin
1997 945 CD (B230FK) [RIP: 1991 945 Turbo (B230FT) 1992 945 SE turbo (B200FT)]
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