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NASCAR valve spring
Posted: 03 Apr 2007, 16:04
by Ranald
This is a really interesting video of a NASCAR valve spring running at 7000 rpm. The example is from a 7 year old engine but is almost exactly the same to what is racing today.
http://www.youtube.com/watch?v=i_NpzU4pGjc
Posted: 04 Apr 2007, 08:30
by DaveKillens
And it's nothing to poo poo about. Those springs have to close large valves, at the limit of material science. And to top it off, they have to do it for hours and hours, 500, 600 miles (as well as practice and qualifying). Those puppies run red hot, and have to live in a constant oil spray to survive.
And as displayed, a lot of harminics going on between all the different parts. Get it wrong, and it's done blown up, bubba.
