Explain to me again, please

[Grey Ghost]

Why did hydraulic lifter combinations get solids and adjustable rockers? I'm fine with that improvement but it certainly wasn't new technology. My 64 MW was OEM solids.

[Frank Castros]

Originally Posted by Billy Nees

And that's an awful lot of flat tappet motors. What kind of an effect do you think that change will have on the rest of the motor? What else will need to be changed to take advantage of the ability to use more aggressive cam profiles without breaking a lifter or wiping a cam? Not to mention the higher RPM capability.
What we need is a valve spring rule.

When the Cam Duration and Valve Spring rules were changed many years ago that created a Domino effect that changed Stock Eliminator forever.

[KRatcliff]

Originally Posted by Frank Castros

When the Cam Duration and Valve Spring rules were changed many years ago that created a Domino effect that changed Stock Eliminator forever.

Just my opinion, but I think you are hitting on the reason for changes such as these. Simplification of tech because they have lost most everyone that could accurately measure cam duration. Almost every change looking back over the last few years has been to make it easier on the tech officials if they ever do look at something. Same thing with the lifter issue. Anyone can eyeball a roller vs flat and it is easier to measure lift without replacing the lifter with a solid if it is already solid.

Could be all wet, but this is why I think we see changes like these. This is not to be read as I agree with the simplification for them to do their job.