Andy, I loved the comment that the wear marks on the valve springs took energy to make. Wow!
Folks, if you're pondering how AndyF makes power, it's because of understanding things like this.
Conical springs? It just freaks me out how the Spintron has pushed the understanding of valve train dynamics. Years ago Isky made a spring for smallblock Chevies that had a small end to fit in the spring pockets, and then ballooned out to 1.55or so for the rest of the way up to the retainer. They were beehive springs, but they were upside down.
BTW I need one new Isky 2005 valve spring to round out a set.
