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Old 01-06-2010, 09:32 AM
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Originally Posted by RippinRon
I have a 355 that is sitting waiting to be installed in my camaro. It has a solid roller cam and roller rockers. It also has a screen kit installed into the lifter valley. Should I remove the oil restrictors and just run plugs? The car is mostly street but plan on the occasional trip to the strip and the road coarse. It has a canton road race oil pan with a 6 quart capacity. Any insight would be great.

There should be no oil restrictors or any elimination of flow to the lifters. The SBC is dependent upon flow from the lifters thru the pushrods for rocker box lubrication and cooling. While roller rockers drastically reduce the need for lubrication, high lift cams with stiff valve springs and high operating RPMs drastically increase the need for spring cooling, the source of which is that oil being pumped up there.

Some racers reroute upper end oil by terminating or reducing the typical Chevy flow from the lifter galleys, but they employ modified rocker covers that have an internal oil spray system that is used to cool the valve springs and secondarily lube the rockers. These systems are furnished with oil from externally added plumbing. This is a complicated and expensive solution to the problem considering the factory has a built in process. It does become a necessary addition for Grand National type engines where the hours long extended high speed running demands more precise cooling of the valve springs. But for the street and occasional races this is overkill.

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