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Fox Body Mustangs
GT40 Intake - to port or not to port
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<blockquote data-quote="351stang" data-source="post: 14974661" data-attributes="member: 1355"><p>Port matching the lower intake to the head intake port is always a good idea. Don't touch the upper intake.</p><p></p><p>I'd also double check the value of intake before you modify it. There are cheaper/better cast upper intakes from a performance perspective, but the GT40 intake was expensive and on a few special addition (non-ford) like the SCCA Mustangs.</p><p></p><p>I gave one of the things away 10 years ago. :mj:</p><p></p><p>FYI: A 1" phenolic spacer between the upper and lower was worth about 5 HP. Not just from a heat limiter, but from a runner length benefit.</p></blockquote><p></p>
[QUOTE="351stang, post: 14974661, member: 1355"] Port matching the lower intake to the head intake port is always a good idea. Don't touch the upper intake. I'd also double check the value of intake before you modify it. There are cheaper/better cast upper intakes from a performance perspective, but the GT40 intake was expensive and on a few special addition (non-ford) like the SCCA Mustangs. I gave one of the things away 10 years ago. :mj: FYI: A 1" phenolic spacer between the upper and lower was worth about 5 HP. Not just from a heat limiter, but from a runner length benefit. [/QUOTE]
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GT40 Intake - to port or not to port
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