In my first post I mentioned an extended sump. The reason behind this upgrade is the standard sump on the RB26 is fine for a street-only vehicle, but if you take it to the track and push it hard enough you'll run into oil starvation problems. Oil starvation is obviously a bad thing. A spun bearing is usually the end result, requiring a rebuild - this is where things get expensive.
In a nut shell, high G forces from cornering, accelerating and braking will cause the oil to flow away from the pickup and climb the walls of the inside of the block.
The Garage101 extension and gated baffle setup looks to be a very well thought out solution to the problem especially when combined with other fixes to resolve the other oiling issues the RB26 suffers from. In addition to the sump and gated baffles, I've also got a Garage101 Head drain to fit at the same time. There is a lengthy discussion on the Skylines Australia forums in the Forced Induction Performance section about the why the "head drain" works. Looks to be not just a drain, but a pressure sump to head pressure equalisation solution to allow the factory oil return galleries to work better. Worth a read: http://www.skylinesaustralia.com/forums/Oil-Control-Rb-s-Circui-t110680.html
At present my sump/diff is off having the diff put back together with all new bearings and seals by a differential specialist. The GTR's front diff is integrated into the sump as you'll see in the photos below.
Sump dummy fitted to a spare motor up-side-down on an engine stand:
Gated and winged baffles that need fitting inside sump:
(Note: the wings stick into the left and right sides, facing forwards)
Winged, gated baffles with top cover plate sitting on top, extended pickup sitting in the centre:
Photo of head drain block.
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