Originally Posted by Gadgetized

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.

Originally Posted by 03sierraslt

What lifters, they could be an issue also.

Originally Posted by Vortec350ss

Yes but the intake valve closes at the bottom of the stroke. The exhaust valve closes right up top. Intake valve float will not result in a valve hitting a piston where an exhaust valve floating will... And there is VERY little room for error there.

Originally Posted by 03sierraslt

I'll be honest, I don't trust them.... Period.

Originally Posted by Gadgetized

What should I get? I don't mind spending money on the right parts. I just put them in my Chevelle engine too.