Castillo then drilled out the oil passage plugs in the crank to facilitate cleaning and tapped the holes so screw in hex plugs could be used. This is much safer and more secure than the stock pressed in plugs. The journal oil holes were chamfered and teardropped to create a reservoir for oil from the main bearing feed to improve oil flow to the rod bearings. The bob weights of the same weight as our rods and pistons were bolted to the crank and the whole assembly was dynamically balanced. As a final step all of the cranks journals were micro polished to reduce friction and help improve bearing life. Although all of these steps are not needed in a low buck engine, they are not particularly expensive either.
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发表于 2011-4-12 00:05
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发表于 2011-4-12 01:19
发表于 2011-4-12 14:22