The Rs2000 sump is not ideal as it only has a wing on one side, it therefore suffers surge problems on fast left handers as the oil all moves away from the pickup into the big space on the offside of the sump.
A standard cossie sump is not bad as it is fairly square around a central pick up pipe so doesn't have the same surge problems of the Escort one, to surge away from the pick up pipe the oil actually has to climb the sump walls, can happen but needs a lot more cornering force than with RS2000 sump.
There is a bit can be done to improve the Rs sump though too, a baffle plate against the opening to the wing helps, but the biggest issue and one that always seems to be overlooked is to make sure the oil pipe is near the bottom of the sump, I do this on every pinto and get it to around8mm, but having checked and measured them before I have found they are often 20-25mm away, that's a long way above the oil when it starts to move
They can also be omproved by adding a 1" band of alloy (by welding in) round them to increase the capacity.
Incidentally, Smiffy's Mk1 runs a RS2000 sump and has never had a problem, and at around 10,000 miles a year is probably one of the hardest used Cossied Escorts around, dunno how he gets away with it, maybe the oil returns from the head quicker on a YB than a pinto?
Bookmarks