Oil pump FAILURE
#5
Staging Lane
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Join Date: May 2007
Location: San Leon TX
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Built 427 based on wet sump LS7 block.. Dedicated road race car, less than 8 hrs on engine but lives only in the top half of the RPM range.. Pick up and o-ring all looked good. This engine was rigged with external oil pressure regulator and allways had a high freq. chatter that I thought was the regulator but guess it was the pump.. Going dry sump.. After going thru the engine for a cleanup that is......
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#8
Staging Lane
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Join Date: May 2007
Location: San Leon TX
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It was a Mellings pump... rigged with the internal regulator blocked, the oil exits the block at the left front gallery plug, goes to ext. regulator-filter-cooler, then back in the block at the rear gallery plug..