setting up stage II oiling for wetsump

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May 28, 2001
My setup is currently done, but am going through and changing a few things. Stage II on center with stage II heads and roller cam bearings. I am downgrading from the dutweiller pump and high volume cover which uses high volume big block gears to a more sane standard cover with dutweiller pump using standard V-6 high volume gears. My motor was originally setup for hydraulic roller and Champions, but is now solid roller with the stage II heads. What do I need to look at as far as restricting oil to the top end or the lifters? Fairly healthy 9.0 @ 150 motor that is street driven. I was thinking of adding drainback holes in the valley to aid drainback and to get a little splash oiling on the cam at lower rpms since nothing is coming out the cam bearings. I also wanted to step down the oil pump since I should not need that volume of oil with roller cam bearings and the solid lifters. All valvetrain oiling is through the pushrods.

Greg Kring
9.0 @ 150
Arlington, Texas
 
Greg, why change something that works? I'd just leave the pump alone, and if you have too much pressure, go to a lighter oil. Your other ideas about the drain-back holes make sense, but you could also go with the lifter bore grooving thing to oil the cam lobes. (In which case you'd want the extra volume of the Duttweiller setup.) JMO.
 
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