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Re: [ST] RE: Shim Design Differences



Masiak, Richard wrote:
To the best of my limited understanding, under-bucket offers higher engine RPM's. I presume higher RPM gives higher engine performance?

As well, my guesstimate would be that in shim over bucket the cam contacts the shim, where shim under bucket the cam lobe touches the bucket. It may be easier to control the surface of the bucket than the shim, heat treating, hardness and all.


This it may be more reliable in terms of higher RPM and just plain old engine longevity to use shim under bucket.

But that is just my guesstimate.

t.

--
Thomas Emberson


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