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Discussion Starter #1
Has anyone put clean, stock D16Y8 intake and exhaust valves on a scale? Looking to get a stock baseline to compare with aftermarket options. Thanks
 

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It's not gonna make a difference so why does it matter? You might notice light weight racing wheels, but you're not gonna notice any power gain at all from valves that are a tenth of a gram lighter
 

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Discussion Starter #3
It's not gonna make a difference so why does it matter? You might notice light weight racing wheels, but you're not gonna notice any power gain at all from valves that are a tenth of a gram lighter
I'm trying to understand how much lighter they are than stock to figure out how much I can reduce stress on the valvetrain, and use that benefit to safely increase maximum rpm.
 

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Reducing stress, juicing success. The weakness in the valvetrain is the springs and the valves, a little bit of weight reduction won't help while using superior quality valves and springs will.

The weakness, specifically, is that the springs won't pull the valves back up quickly enough. So we replace them with springs that push harder. Another potential weakness is the valve itself, the face can chip or fall right off, so stronger valves is important too. Finally, and as important as the other parts, is the valve guides, which should always be replaced on high mileage engines if any of this sort of work is being done just as a crank seal should be replaced when doing a timing belt. I am however considering the springs assembly as the springs, they do also need retainers and possibly locks depending on the design of the replacement retainers.

All in all, this would be interesting info just to have but it's sort of irrelevant to higher rpm function.
 
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