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DOn't forget, its not the air/fuel ratios you are worried about on the dyno tunes. Its the rail pressure at the injectors that is important. Just because the AFR is good on the dyno, doesn't mean that the trims won't go lean on a nice long pull on the freeway racing another car on the top end after the PSI drops to the low 30s or worse. A dyno (unless eddy-current) is not 100% true to load anyway.
Just my two cents.....
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