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2011-2014 Mustangs
Engine/Tuning
5.0 Coyote Valve Spring Upgrade: Brands, size, and price
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<blockquote data-quote="kcsvt94l" data-source="post: 14033624" data-attributes="member: 52268"><p>I love how people didn't take the time to read Shaun's clear explanation of the information which was spot on. </p><p></p><p>How does pressure differential effect an all but closed valve? That is his point. Essentially the only point where you'll have a pressure differential occur on valves due to "BOOST" is in certain turbo applications with excess back pressure due to the additional pressure stored on the exhaust side (hot side) of the turbo. </p><p></p><p>What JPC is saying in regards to the the Boss exhaust cams contributing more so to the issue as opposed to a different cam is because the the bigger(more aggressive grind) exhaust cams in a Turbo boss 302 application magnifies what Shaun is referencing. pressure differential across the exhaust valve. </p><p></p><p>NTXRocker, your situation is no different because of how nitrous works which is simply compressing the amount of air that can be forced into the cylinders before the controlled explosion takes place. At the time of expansion of that compressed air the Intake valve is closed thus not creating any pressure differential across the intake valves.</p><p></p><p>Gpcalero, You would be perfectly ok on a max effort N/A Setup going with the boss 302 springs and valves.</p></blockquote><p></p>
[QUOTE="kcsvt94l, post: 14033624, member: 52268"] I love how people didn't take the time to read Shaun's clear explanation of the information which was spot on. How does pressure differential effect an all but closed valve? That is his point. Essentially the only point where you'll have a pressure differential occur on valves due to "BOOST" is in certain turbo applications with excess back pressure due to the additional pressure stored on the exhaust side (hot side) of the turbo. What JPC is saying in regards to the the Boss exhaust cams contributing more so to the issue as opposed to a different cam is because the the bigger(more aggressive grind) exhaust cams in a Turbo boss 302 application magnifies what Shaun is referencing. pressure differential across the exhaust valve. NTXRocker, your situation is no different because of how nitrous works which is simply compressing the amount of air that can be forced into the cylinders before the controlled explosion takes place. At the time of expansion of that compressed air the Intake valve is closed thus not creating any pressure differential across the intake valves. Gpcalero, You would be perfectly ok on a max effort N/A Setup going with the boss 302 springs and valves. [/QUOTE]
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Engine/Tuning
5.0 Coyote Valve Spring Upgrade: Brands, size, and price
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