I found this in a 2012 Hot Rod article. There are several difference from what I have read in the forum. What does everyone think? Is this new theory or just different.
If you are in between the two extremes--say 6,100 through 7,900 rpm with a production Cleveland block--you still might consider restricting the oil passages. If using the old-school main-saddle restrictor plug technique, the current recommended practice is not to restrict oil to the No. 1 main saddle, because this passage also supplies splash on the timing chain in addition to lubricating the distributor gear. This is why today's restrictor plug kits (including the referenced Moroso kit) now have only four small restrictors for the main saddles.
The kit's single, large plug that goes in the No. 5 main saddle's big hole should only be installed if running solid flat-tappet or solid-roller cams. It should not be used with any hydraulic flat-tappet or hydraulic-roller lifter. Also, use late-model, high-perf hydraulic lifters with a small oil opening (0.040 inch), or use restricted pushrods as noted above. Whether it's wise to take a hydraulic cam to such high rpm is, of course, another question entirely.
Read more: http://www.hotrod.com/techarti...g_fix/#ixzz3ER6CDntD
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