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Mustang Forums
2011-2014 Mustangs
Engine/Tuning
Custom L&M Intake Cam change results:
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<blockquote data-quote="Shaun@AED" data-source="post: 15337472" data-attributes="member: 32381"><p>I suppose that depends on the intended RPM band Comp had in mind.</p><p></p><p>We have seen valve float above 7600RPM with their Stage 3 setup on the coyote and stock valve springs. A buddy bent his exhaust valves from banging on the 8K rev limiter in his 14. Another customer in the middle east bent the exhaust valves as well. As a result I set the rev limits with Comp Cams lower than with stock cams unless valve springs are installed.</p><p></p><p>According to L&M the data he has on the Comp lobe profiles vs stock spring shows they will float the valves. They are too aggressive on the lobe profile for higher RPM. The intake lobe also floats, but due to where it floats (bounces on the seat) we've not seen it tap the piston and bend the valve. The exhaust closes during the overlap phase so it does get close enough to the piston to tap it.</p></blockquote><p></p>
[QUOTE="Shaun@AED, post: 15337472, member: 32381"] I suppose that depends on the intended RPM band Comp had in mind. We have seen valve float above 7600RPM with their Stage 3 setup on the coyote and stock valve springs. A buddy bent his exhaust valves from banging on the 8K rev limiter in his 14. Another customer in the middle east bent the exhaust valves as well. As a result I set the rev limits with Comp Cams lower than with stock cams unless valve springs are installed. According to L&M the data he has on the Comp lobe profiles vs stock spring shows they will float the valves. They are too aggressive on the lobe profile for higher RPM. The intake lobe also floats, but due to where it floats (bounces on the seat) we've not seen it tap the piston and bend the valve. The exhaust closes during the overlap phase so it does get close enough to the piston to tap it. [/QUOTE]
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Custom L&M Intake Cam change results:
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