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Cobra Forums
2013-14 Shelby GT500
750 HP Packages
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<blockquote data-quote="Norton" data-source="post: 16470809" data-attributes="member: 145307"><p>IIRC, 12% is a reasonable assumption for drivetrain loss, which would make your flywheel numbers ~720/680.</p><p></p><p>I'm surprised none of the upgrade packages you listed include a smaller pulley, with only Van showing it as an option. (I'm not looking for another VMP debate/bashing session, but their <a href="https://www.vmpperformance.com/2013-14-GT500-STAGE-4-Power-Pack-100rwhp" target="_blank">STAGE 4 Power Pack</a>, which includes a 2.4" Upper and 90mm Idler, is advertised as good for "up to 100+ rear wheel horsepower.") I can't recall many (any?) making ~750RWHP without a pulley swap. Also, I'm not knocking mail order tunes, but a reputable local tuner MAY be able to safely tweak better numbers if your car is on a dyno right in front of them in real-time.</p></blockquote><p></p>
[QUOTE="Norton, post: 16470809, member: 145307"] IIRC, 12% is a reasonable assumption for drivetrain loss, which would make your flywheel numbers ~720/680. I'm surprised none of the upgrade packages you listed include a smaller pulley, with only Van showing it as an option. (I'm not looking for another VMP debate/bashing session, but their [URL='https://www.vmpperformance.com/2013-14-GT500-STAGE-4-Power-Pack-100rwhp']STAGE 4 Power Pack[/URL], which includes a 2.4" Upper and 90mm Idler, is advertised as good for "up to 100+ rear wheel horsepower.") I can't recall many (any?) making ~750RWHP without a pulley swap. Also, I'm not knocking mail order tunes, but a reputable local tuner MAY be able to safely tweak better numbers if your car is on a dyno right in front of them in real-time. [/QUOTE]
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2013-14 Shelby GT500
750 HP Packages
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