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GEN 3 (2021+) Ford F-150 Raptor Forums
Ford Raptor Engine Discussion and Performance Mods
Official Gen 3 COBB Tuning Thread - Accessport, Intake Bracket, etc
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<blockquote data-quote="COBB Tuning" data-source="post: 1891324" data-attributes="member: 30143"><p>The photo labelled "Open and not problematic" is actually showing the factory revised shroud installed. Scroll a few photos down to see what the shroud removed looks like. In our testing, removal of the shroud performs just as well as our revised shroud, with the zip tie method basically just as efficient.</p><p></p><p>Pre-filter airbox pressure was identical for the removed shroud and the installed COBB shroud. The real problem is not necessarily the size of the opening, but the deformation of the stock unit under load. With greater airflow, the leading edge of the stock unit will warp and pull in closer to the snorkel inlet, blocking airflow even more. This is the primary difference between the original and revised factory units shown in the link below.</p></blockquote><p></p>
[QUOTE="COBB Tuning, post: 1891324, member: 30143"] The photo labelled "Open and not problematic" is actually showing the factory revised shroud installed. Scroll a few photos down to see what the shroud removed looks like. In our testing, removal of the shroud performs just as well as our revised shroud, with the zip tie method basically just as efficient. Pre-filter airbox pressure was identical for the removed shroud and the installed COBB shroud. The real problem is not necessarily the size of the opening, but the deformation of the stock unit under load. With greater airflow, the leading edge of the stock unit will warp and pull in closer to the snorkel inlet, blocking airflow even more. This is the primary difference between the original and revised factory units shown in the link below. [/QUOTE]
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GEN 3 (2021+) Ford F-150 Raptor Forums
Ford Raptor Engine Discussion and Performance Mods
Official Gen 3 COBB Tuning Thread - Accessport, Intake Bracket, etc
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