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on 91 octane in CA our GT3076R's max out at 280 whp on pump fuel regardless of how high you bump up the boost. Have to remove so much timing to stave off knock.
Which is why I am now flex. Hitting:
275 at 6 psi
340 at 9.5 psi
400 at 14.5 psi
(dynojet whp)
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