Unless You're runnin' a flathead, gravity is working against Your valves........control-wise....Yeah, but the valves also have gravity on their side. I think some of yall are over thinkin this stuff. There's just no way in hell I'd run a hollow valve. I think it's splittin hairs and it's best to look elsewhere for "upgrades".
And BEEFY pushrods, lol! My "Killer 6" got wound to 7k a few times with "249" 340HP singles/dampers, no drama or damage or sound of "float", but when I retired it the evidence was there upon teardown.....All it takes is the right valve spring. You could put in a valve with a 1/2” stem and with enough spring not experience valve float.
Cool, thank you I do have the howard's springs. I suppose sometimes I overthink things and ask questions like this thread just because I don't know and end up finding some more guys to help me & all of us outThat's not a lazy cam, but not killer, the best way if You want to cut grams would be beehives with the small retainers. If You use the springs Howards recommends, float shouldn't be a concern, 7K+...
Yeah, you can be too light. When **** starts breakin from havin holes in it.Google EFI university and look for some of his videos on spintron development. Valve weight is a big deal, even at 6000 rpm. If you can spend a few hundred bucks and save valve weight it’s cheap money spent. Also, if you have your poop in one group you can use Ti retainers and save there too. You can’t make the valve side too light. Weight is a killer.
Initially the cam moves the valve, but after it starts moving you need spring to control the inertia and control bounce. Lighter valvesSomebody would have to explain to me how valve weight affects spring pressure. It's the lobe lift that dictates spring pressure. At least that's how I see it......maybe I'm misunderstooken.
I get it.....I guess what I should have said was, IMO it's splittin the HELL out of hairs to take a chance on using hollow valves. Valves crack and break sometimes as it is. Yall use that ****. I'm stickin with with solid ones.Initially the cam moves the valve, but after it starts moving you need spring to control the inertia and control bounce. Lighter valves
Have less inertia, kinda like lighter weight pistons are easier on your rods and bolts.
I won't even use those small diameter solid valves.I get it.....I guess what I should have said was, IMO it's splittin the HELL out of hairs to take a chance on using hollow valves. Valves crack and break sometimes as it is. Yall use that ****. I'm stickin with with solid ones.