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2013-14 Shelby GT500
800 SAE on CA pump 91:
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<blockquote data-quote="Shaun@AED" data-source="post: 15518809" data-attributes="member: 32381"><p>Most definately the cams were THE reason this engine tolerated 91 with the 2.4" blower pulley. On CA 91 we find the STOCK blower pulley makes more power by 20-30 over a 2.4" on pump gas. The cams moved peak cylinder pressure UP in RPM allowing us to pulley down on pump and still have proper ignition timing.</p><p></p><p>Peak boost was 16psi, dropping to 14-15 up top.</p></blockquote><p></p>
[QUOTE="Shaun@AED, post: 15518809, member: 32381"] Most definately the cams were THE reason this engine tolerated 91 with the 2.4" blower pulley. On CA 91 we find the STOCK blower pulley makes more power by 20-30 over a 2.4" on pump gas. The cams moved peak cylinder pressure UP in RPM allowing us to pulley down on pump and still have proper ignition timing. Peak boost was 16psi, dropping to 14-15 up top. [/QUOTE]
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2013-14 Shelby GT500
800 SAE on CA pump 91:
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