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2020+ Shelby GT500 Mustang
Anyone else frustrated with Ford over the next GT500?
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<blockquote data-quote="68fastback" data-source="post: 16151248" data-attributes="member: 44957"><p>The GT350 FPC factory headers are a cascaded design: they are neither equal length nor are they 4-into-1. On both sides they are 2-into-1 then 3-into-1 @ the collector, so the firing order is key because the 2-into-1 long runner intercepts the additional cylinder such that, when joined at the collector by the other two dedicated pipes, all pulses (one tube carrying two cylinders 'timed' around the other two dedicated pipes) are properly spaced for effective scavenging. That exact configuration cannot be transferred to a CPC engine. However I would expect that Ford will do a similar design for the GT500 but with the long runner of the 2-into-1 picking up a different cylinder . They could do a 4-into-1 but there likely is not enough space for 4 dedicated pipes to the collector (why they didn't do it on the GT350). Alternatively, they could do an old-school 'plenum' design which would be far less efficient, so a 4-into-1 would probably mean equal length which would be too problematic space-wise. So, given all constraints, a GT350-like cascaded (2>1 + 3>1) design, but re-optimized for CPC, makes the most sense, imho.</p></blockquote><p></p>
[QUOTE="68fastback, post: 16151248, member: 44957"] The GT350 FPC factory headers are a cascaded design: they are neither equal length nor are they 4-into-1. On both sides they are 2-into-1 then 3-into-1 @ the collector, so the firing order is key because the 2-into-1 long runner intercepts the additional cylinder such that, when joined at the collector by the other two dedicated pipes, all pulses (one tube carrying two cylinders 'timed' around the other two dedicated pipes) are properly spaced for effective scavenging. That exact configuration cannot be transferred to a CPC engine. However I would expect that Ford will do a similar design for the GT500 but with the long runner of the 2-into-1 picking up a different cylinder . They could do a 4-into-1 but there likely is not enough space for 4 dedicated pipes to the collector (why they didn't do it on the GT350). Alternatively, they could do an old-school 'plenum' design which would be far less efficient, so a 4-into-1 would probably mean equal length which would be too problematic space-wise. So, given all constraints, a GT350-like cascaded (2>1 + 3>1) design, but re-optimized for CPC, makes the most sense, imho. [/QUOTE]
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2020+ Shelby GT500 Mustang
Anyone else frustrated with Ford over the next GT500?
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