There was an article in regards to LS7’s dropping valves with certain performance cam/ spring packages. It took a spintron and a laser inferometer to figure out there was excessive bounce during closing. They changed the spring package to resolve the issue and reliability was acceptable. Science is cool
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Originally Posted by r lane
A business friend of mine builds turbocharged drag engines. They built a motor with ti valves. The engine went lean and blew on the dyno.(I guess drag engines don't give you much time to make on the run adjustments). I don't know at the time of our conversation, whether the motor had been disassembled, but according to my friend, his assessment was that the ti valves had created more compression, heat due to there sealing ability, minimal bounce and therefore required more fuel than had been programmed. I am sure there are slo mo videos of high reving valve train systems. Be interesting to see what the valve really does when the cam releases it.
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