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Message: [QUOTE="Big Bore, post: 116948, member: 760"] The spring rate is transferred directly to the valve, otherwise it would have no affect on anything. What you are calling "connecting" is known as load transfer. This [I]should[/I] be obvious in that Doug has made larger locks to retain his higher rate springs Where do you think the seat pressure is measured? I think the word you are looking for is "implying". You would be the one "inferring". And I'm not implying anything, I'm making a clear statement. Boost acts on the valve, which is connected to the spring. Remove the valve springs, turn the head upside down so gravity will hold the valve in place, and put 60 psi to the sealed intake runner. Make sure no one is standing over the valve and that it's not aimed at anything important. Ok, I'll play. Not only have I disassembled several sets of heads, I have assembled the new heads (I did not do the actual head assembly, not that it's relevant) to the long block and installed the motors. I have had the VC's off numerous 7.3's and R&R'd several sets of injectors and o-rings. Additionally I've disassembled numerous heads both 4 stroke and 2 stroke and done head work including valve seat lapping and porting and polishing. I'm certified to work on large and small diesel generators, both the engines and the electronics, and I'm currently an engineering student. I have extensive experience in other fields that directly involve loads and supporting them properly. Now it would only be good manners to share your experience and qualifications. And your initial remark of claiming not to intend to insult me seems a bit disingenuous based on the remarks that followed and the ones below. Really?:slap: [/QUOTE]