Carnage pics
#22
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They are Brian Tooley Racing .660 titanium springs. I have about 3k miles on them. I turned the engine 7200 on the dyno last year with them. If I had to guess I think the engine let go at around 5900 RPM's. I didn't inspect to see if a spring was broke. If I had to guess by the looks of the piston it appears that valve floated and got broke off when it touched the piston. If there isn't a broke spring, I'm sort of at a loss. Maybe I'm thinking too much into it, but if a valve were to float wouldn't it be the intake valve? I would assume it is heavier, it has a shorter duration therefore it is opening quicker, and has boost pressure helping it open.