428 stroker valve spring recommendation solid roller

[blykins]

There should be no "wear" on the valve tips.  If so, then as Jay says, there is a hardness issue with the tips. 

[machoneman]

There should be no "wear" on the valve tips.  If so, then as Jay says, there is a hardness issue with the tips.

It seem that more worn valve tips have been commented on in recent years. In most cases, it appears that cheapo SS valves, available for some pretty low prices on E-Bay and through some mail order shops, don't have the proper heat-treat to the tips or are lacking a pressed-in hardened tip. I wonder if our pro engine builders like Brent are seeing more of these failures. 

[blykins]

Not really, but I use SI, REV, Ferrea, and Manley valves.  Not cheap stuff. 

Only issue I've ever had was on a custom hollow stem Ferrea that had a pressed on tip.  I went to put the valve up into the guide to assemble it and when the valve tip went into the guide, it shattered...

At some point it's worthwhile to run a lash cap, but I have run many 600-700 lb open pressure spring combos on the valves listed up above and didn't get any wear. 

[cjshaker]

It seem that more worn valve tips have been commented on in recent years. In most cases, it appears that cheapo SS valves, available for some pretty low prices on E-Bay and through some mail order shops, don't have the proper heat-treat to the tips or are lacking a pressed-in hardened tip.

That's the understatement of the year (and it's early in the year ) Staying away from the cheap junk listed on Ebay is the first step to building a decent engine. Or, in other words, you get what you pay for.

[oz fe]

the valves used in my motor are manley severe duty 427 valves pt no 11884 2.190 3/8''  marks in the top of them
all good top shelf parts used

[jayb]

That's interesting, the last valves I had that happen with were also Manleys, back in 2005.  Strange, because they are usually top shelf parts.

[oz fe]

lash caps I guess will fix this

[jayb]

That's how I fixed it with my engine.

[cjshaker]

the valves used in my motor are manley severe duty 427 valves pt no 11884 2.190 3/8''  marks in the top of them
all good top shelf parts used

I hope you didn't think I was referring to you, Oz. That wasn't the case.

I've used Manleys several times without issues, but even in the aerospace industry and NASA, rare but occasional issues with metallurgy can and do happen.

[oz fe]

no no cj all good I didn't think that