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Mustang Forums
2011-2014 Mustangs
Engine/Tuning
2011-2014 Auto 5.0 8,000-rpm Tuning
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<blockquote data-quote="Shaun@AED" data-source="post: 15266251" data-attributes="member: 32381"><p>We see float on GT springs at 7600-7800 with Comps NSR line, Boss springs have 8lbs higher seat pressure, that does not give us much room and it's impossible to determine the point of valve float in a given application without actually hitting valve float. If you want to chance kissing the exhaust valve and piston I will raise your limiters to 8500, but I do not recommend it and you will still have VCT reverting back to base if you shift above 8K or if RPM's flare past 8K during a shift. Going thru the traps at 8500 is not the issue, it's VCT after a shift that changes.</p></blockquote><p></p>
[QUOTE="Shaun@AED, post: 15266251, member: 32381"] We see float on GT springs at 7600-7800 with Comps NSR line, Boss springs have 8lbs higher seat pressure, that does not give us much room and it's impossible to determine the point of valve float in a given application without actually hitting valve float. If you want to chance kissing the exhaust valve and piston I will raise your limiters to 8500, but I do not recommend it and you will still have VCT reverting back to base if you shift above 8K or if RPM's flare past 8K during a shift. Going thru the traps at 8500 is not the issue, it's VCT after a shift that changes. [/QUOTE]
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2011-2014 Auto 5.0 8,000-rpm Tuning
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