Beehive valve springs

[Neil Harvey]

Nose pressures required are based upon Camshaft chosen and the masses that are moved and need to be controlled. Many have horrible harmonics built in that require more pressures to be included. Typically the "horrible's" don't happen until engine speeds get above 6000 RPM in these 2V engines.

Seat pressures are more about the valve seat shapes and widths, not the camshaft. The older more traditional designs where the opening and closing Valve speeds are the same don't require so much control. The more modern A symmetrical designs where valve speeds are faster on opening may require a different set of spec's.

Its great more innovation is happening to these older engines. There is no reason why we have to keep building these dinosaurs the same they were back in the days of Lincoln.

Bring it on! There is life left in these "clunkers".

[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.

[KTL]

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.

Watch this one.

https://www.youtube.com/watch?v=_REQ1PUM0rY

[BURN-BROS]

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

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.

[brighton911]

Thanks for posting that video Kevin. Amazing what is going on at higher RPM's. High speed video sure shows what happens if things aren't as they should be.

[stownsen914]

Originally Posted by KTL

Watch this one.

https://www.youtube.com/watch?v=_REQ1PUM0rY

That felt like a horror movie, in multiple ways!

Seriously, thanks for sharing that, KTL.