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Cobra Forums
2013-14 Shelby GT500
Big Front Mount Turbo from Kenne Bell Blower.
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<blockquote data-quote="biminiLX" data-source="post: 16020334" data-attributes="member: 7795"><p>I'd expect 2.5" crossover as the turbine wants to see velocity.</p><p>It's typical the exhaust port is sized large enough to cover the head port then tube Diameter and collector size are slightly smaller than NA builds, with the twin crossover pipe merging just before the turbine to hit it hardest with exhaust energy. </p><p>My first T6 427W single had a 3" crossover and second build had 2.5" but spooled quicker and made more power.</p><p>I'm guessing 1 5/8 primaries (1 7/8 to 1 5/8 if stepped) and 2.5" collector (or 3" collector then reduced) for 2.5" crossover pipes. Guys have made big four digit power with 2.25" crossovers.</p><p>It's all about total combination <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p><p>-J</p></blockquote><p></p>
[QUOTE="biminiLX, post: 16020334, member: 7795"] I'd expect 2.5" crossover as the turbine wants to see velocity. It's typical the exhaust port is sized large enough to cover the head port then tube Diameter and collector size are slightly smaller than NA builds, with the twin crossover pipe merging just before the turbine to hit it hardest with exhaust energy. My first T6 427W single had a 3" crossover and second build had 2.5" but spooled quicker and made more power. I'm guessing 1 5/8 primaries (1 7/8 to 1 5/8 if stepped) and 2.5" collector (or 3" collector then reduced) for 2.5" crossover pipes. Guys have made big four digit power with 2.25" crossovers. It's all about total combination :) -J [/QUOTE]
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2013-14 Shelby GT500
Big Front Mount Turbo from Kenne Bell Blower.
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