I believe a stock TR4 crank has one hole drilled thru the crank journal that
carries the oil from the main bearing housings into the crank and passes to
each rod journal. The stock crank has one set of cross drill holes in the rod
journals to carry the oil out to the rod bearings plus a second set, what we
are refering to as "cross drilled" at 90 degrees of each other.
Moldex is recommending just single passages on each journal. We think two on
the rods and maybe the mains as well? Rich thinks a stock crank has a very
small set of holes in the mains but we don't have a crank in our hands right
now to look and confirm.
Am I making it clear now?
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